{"id":6824,"date":"2025-03-18T14:23:14","date_gmt":"2025-03-18T14:23:14","guid":{"rendered":"https:\/\/support.lehle.com\/lehle-p-iso-trs-xlr-stereo"},"modified":"2025-06-13T08:02:10","modified_gmt":"2025-06-13T08:02:10","slug":"lehle-p-iso-trs-xlr-stereo","status":"publish","type":"page","link":"https:\/\/support.lehle.com\/en\/lehle-p-iso-trs-xlr-stereo","title":{"rendered":"LEHLE P-ISO TRS XLR STEREO"},"content":{"rendered":"<p>[vc_row equal_height=&#8221;yes&#8221; row_content_display=&#8221;in_grid&#8221; row_content_display_align=&#8221;left&#8221; row_type=&#8221;row&#8221; stretch_row_type=&#8221;yes&#8221; css=&#8221;.vc_custom_1718966832697{margin-top: 3vh !important;}&#8221;][vc_column width=&#8221;1\/2&#8243;][vc_single_image image=&#8221;6708&#8243; img_size=&#8221;large&#8221;][\/vc_column][vc_column width=&#8221;1\/2&#8243;][vc_column_text]<\/p>\n<h1><\/h1>\n<h3>OPERATING INSTRUCTIONS<\/h3>\n<h1>LEHLE P-ISO TRS XLR STEREO<\/h1>\n<p>[\/vc_column_text][\/vc_column][\/vc_row][vc_row row_content_display=&#8221;in_grid&#8221; row_content_display_align=&#8221;left&#8221; row_type=&#8221;row&#8221; stretch_row_type=&#8221;yes&#8221;][vc_column]<div class=\"content-wrapper body-content\"><aside class=\"col-md-4 col-sm-12 inlinedocsidebar\" id=\"sidebar-box\" style=\"padding-left: 0px;\"><div class=\"custom-well blankbg sidebar-nav\" style=\"padding-left:0px; padding-top:0px;\"><div class=\"inlinedocs-sidebar\" id=\"docinlinespy\"><div class=\"inlinesearch_formwrap\"><form role=\"search\" method=\"get\" id=\"searchform\" class=\"searchform\" action=\"https:\/\/support.lehle.com\/en\"><input type=\"hidden\" value=\"manual_documentation\" name=\"post_type\" id=\"search_post_type\"><input type=\"text\" placeholder=\"Search \u2026\" value=\"\" name=\"s\" id=\"s\" class=\"inlinesearchbox\"\/><\/form><\/div><ul class=\"nav\"><li class=\"inline-root-li\"><span class=\"inline-progress-bar\"><\/span><a href=\"#6822\" class=\"inlineclick root\">LEHLE P-ISO TRS XLR STEREO<\/a><ul class=\"nav inline-child\"><li><a href=\"#6882\" class=\"inlineclick child\">Introduction<\/a><\/li><li><a href=\"#6884\" class=\"inlineclick child\">Technical data<\/a><\/li><\/ul><span class=\"icon\"> <i class=\"icon_plus\"><\/i> <i class=\"icon_minus-06\"><\/i> <\/span><\/li><li class=\"inline-root-li\"><span class=\"inline-progress-bar\"><\/span><a href=\"#6886\" class=\"inlineclick root\">Signal routing<\/a><ul class=\"nav inline-child\"><li><a href=\"#6887\" class=\"inlineclick child\">Unbalanced Signal Routing<\/a><\/li><li><a href=\"#6889\" class=\"inlineclick child\">Balanced Signal Routing<\/a><\/li><\/ul><span class=\"icon\"> <i class=\"icon_plus\"><\/i> <i class=\"icon_minus-06\"><\/i> <\/span><\/li><li class=\"inline-root-li\"><span class=\"inline-progress-bar\"><\/span><a href=\"#6898\" class=\"inlineclick root\">General description<\/a><\/li><li class=\"inline-root-li\"><span class=\"inline-progress-bar\"><\/span><a href=\"#6895\" class=\"inlineclick root\">TYPICAL USES: LEHLE P-ISO TRS XLR STEREO<\/a><ul class=\"nav inline-child\"><li><a href=\"#6931\" class=\"inlineclick child\">as isolator for effect devices<\/a><\/li><li><a href=\"#6906\" class=\"inlineclick child\">as isolator in the studio<\/a><\/li><li><a href=\"#6908\" class=\"inlineclick child\">as isolator in a stereo setup<\/a><\/li><li><a href=\"#6904\" class=\"inlineclick child\">as isolator for keyboards and active speakers<\/a><\/li><\/ul><span class=\"icon\"> <i class=\"icon_plus\"><\/i> <i class=\"icon_minus-06\"><\/i> <\/span><\/li><li class=\"inline-root-li\"><span class=\"inline-progress-bar\"><\/span><a href=\"#6910\" class=\"inlineclick root\">Signal flow diagram<\/a><\/li><\/ul><\/div><\/div><\/aside><div class=\"col-md-8 col-sm-12 inline-content-block-left inline-content-wrap\" style=\"padding-right: 0px;\"><div class=\"print-content inline-content-block\"><div class=\"printinlinedoc\"><span class='printomatic pom-small-grey ' id='id4006'  data-print_target='.print-content'><\/span><\/div><div id=\"6822\" class=\"ininebody padding-bottom-45\" style=\"padding-top: 0px;\"><div class=\"page-title-header\"><h2 class=\"inline-pagetitle\">LEHLE P-ISO TRS XLR STEREO<span class=\"inlinedoc-postlink\" onclick=\"prompt('Press Ctrl + C, then Enter to copy to clipboard','https:\/\/support.lehle.com\/en\/manual\/signal-flow-diagram-12#6822')\">#<\/span><\/h2><\/div><div class=\"post-cat margin-btm-35\"><\/div><div class=\"entry-content clearfix\"><div id=\"toctoc\"><\/div>\t\t<div class='wp-block-ppb-print-page noPrint  align' id='ppbPrintPage-d47464c3-7' data-attributes='{&quot;cId&quot;:&quot;d47464c3-7&quot;,&quot;isPrintSection&quot;:true,&quot;sectionSelector&quot;:&quot;.print-content&quot;,&quot;icon&quot;:{&quot;type&quot;:&quot;default&quot;,&quot;default&quot;:&quot;fiPrinter&quot;,&quot;url&quot;:&quot;&quot;},&quot;btnColors&quot;:{&quot;color&quot;:&quot;rgba(0, 0, 0, 1)&quot;,&quot;bg&quot;:&quot;#ffffff&quot;},&quot;btnBorder&quot;:{&quot;radius&quot;:&quot;0px&quot;,&quot;width&quot;:&quot;0px&quot;,&quot;color&quot;:&quot;#00d084&quot;},&quot;align&quot;:&quot;&quot;,&quot;alignment&quot;:&quot;right&quot;,&quot;isModal&quot;:false,&quot;isIcon&quot;:true,&quot;isText&quot;:true,&quot;btnText&quot;:&quot;Print&quot;,&quot;btnTypo&quot;:{&quot;fontSize&quot;:{&quot;desktop&quot;:22,&quot;tablet&quot;:20,&quot;mobile&quot;:18}},&quot;btnPadding&quot;:{&quot;vertical&quot;:&quot;5px&quot;,&quot;horizontal&quot;:&quot;15px&quot;},&quot;btnShadow&quot;:[]}'>\r\n\t\t\t<style>\r\n\t\t\t\t#ppbPrintPage-d47464c3-7 .ppbPrintPage button{ font-weight: 400;font-size: 22px;font-style: normal;text-transform: none;text-decoration: auto;line-height: 135%;letter-spacing: 0px; } @media (max-width: 768px) { #ppbPrintPage-d47464c3-7 .ppbPrintPage button{ font-size: 20px; } } @media (max-width: 576px) { #ppbPrintPage-d47464c3-7 .ppbPrintPage button{ font-size: 18px; } }\r\n\t\t\t#ppbPrintPage-d47464c3-7 .ppbPrintPage{\r\n\t\t\t\ttext-align: right;\r\n\t\t\t}\r\n\t\t\t#ppbPrintPage-d47464c3-7 .ppbPrintPage button{\r\n\t\t\t\tcolor: rgba(0, 0, 0, 1);background: #ffffff;\r\n\t\t\t\tpadding: 5px 15px;\r\n\t\t\t\tborder-radius: 0px;\r\n\t\t\t\tbox-shadow: 0px 0px 0px 0px #7090b0 ;\r\n\t\t\t}\r\n\t\t\t\t\t<\/style>\r\n\t\r\n\t\t\t<div class='ppbPrintPage'>\r\n\t\t\t\t<button>\r\n\t\t\t\t\t<svg xmlns='http:\/\/www.w3.org\/2000\/svg' width='30' height='30' viewBox='0 0 24 24' strokeWidth='2' strokeLinejoin='round' stroke='currentColor' style='fill: none;'>\r\n\t\t\t\t<polyline points='6 9 6 2 18 2 18 9' \/>\r\n\t\t\t\t<path d='M6 18H4a2 2 0 0 1-2-2v-5a2 2 0 0 1 2-2h16a2 2 0 0 1 2 2v5a2 2 0 0 1-2 2h-2' \/>\r\n\t\t\t\t<rect x='6' y='14' width='12' height='8' \/>\r\n\t\t\t<\/svg>\t\r\n\r\n\t\t\t\t\t<span>Print<\/span>\t\t\t\t<\/button>\r\n\t\t\t<\/div>\r\n\t\t<\/div>\r\n\r\n\t\t\n\n\n<h4 class=\"wp-block-heading print-content\">Dear Musician!<\/h4>\n\n\n\n<p>Thank you for purchasing the LEHLE P-ISO TRS XLR STEREO<\/p>\n\n\n\n<p>I have been building units that switch, split and route signals with no technical compromises and with maximum musical fidelity since 1999. With the LEHLE P-ISO TRS XLR STEREO, you have purchased a product that uses only the best components.  <\/p>\n\n\n\n<p>All components of the LEHLE P-ISO TRS XLR STEREO are manufactured, assembled and tested in Germany.<\/p>\n\n\n\n<p>The LEHLE P-ISO TRS XLR STEREO is built so robustly that you will enjoy it for a long time. If you should nonetheless have a problem, or simply a question, just mail me or a member of the Lehle team at: <a href=\"mailto:support@lehle.com\">support@lehle.com <\/a><\/p>\n\n\n\n<div class=\"wp-block-columns is-not-stacked-on-mobile is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:30%\">\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"831\" height=\"1024\" src=\"https:\/\/support.lehle.com\/wp-content\/uploads\/2024\/06\/Burkhard-Georg-Lehle-2019-831x1024.jpg\" alt=\"\" class=\"wp-image-2176\" style=\"width:196px;height:auto\" srcset=\"https:\/\/support.lehle.com\/wp-content\/uploads\/2024\/06\/Burkhard-Georg-Lehle-2019-831x1024.jpg 831w, https:\/\/support.lehle.com\/wp-content\/uploads\/2024\/06\/Burkhard-Georg-Lehle-2019-244x300.jpg 244w, https:\/\/support.lehle.com\/wp-content\/uploads\/2024\/06\/Burkhard-Georg-Lehle-2019-768x946.jpg 768w, https:\/\/support.lehle.com\/wp-content\/uploads\/2024\/06\/Burkhard-Georg-Lehle-2019.jpg 1200w\" sizes=\"auto, (max-width: 831px) 100vw, 831px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p>I wish you lots of fun and success with the LEHLE P-ISO TRS XLR STEREO.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"863\" height=\"174\" src=\"https:\/\/support.lehle.com\/wp-content\/uploads\/2024\/06\/Unterschrift.jpg\" alt=\"\" class=\"wp-image-2177\" style=\"width:241px;height:auto\" srcset=\"https:\/\/support.lehle.com\/wp-content\/uploads\/2024\/06\/Unterschrift.jpg 863w, https:\/\/support.lehle.com\/wp-content\/uploads\/2024\/06\/Unterschrift-300x60.jpg 300w, https:\/\/support.lehle.com\/wp-content\/uploads\/2024\/06\/Unterschrift-768x155.jpg 768w\" sizes=\"auto, (max-width: 863px) 100vw, 863px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div><div id=\"6882\" class=\"ininebodyinner\"><h3 class=\"inline-pagetitle\">Introduction<span class=\"inlinedoc-postlink inner\" onclick=\"prompt('Press Ctrl + C, then Enter to copy to clipboard','https:\/\/support.lehle.com\/en\/manual\/lehle-p-iso-trs-xlr-stereo#6882')\">#<\/span><\/h3><div class=\"entry-content clearfix\"><div id=\"toctoc\"><\/div>\n<p>The LEHLE P-ISO TRS XLR STEREO brings you closer to the main mixing system.<br\/><br\/>It converts your stereo audio signal not only to balanced XLR but lifts the ground so there\u2019s no chance of unwanted noise or humming loops. Perfect for your pedal board, modeler and amp simulation in studios, clubs, bars or stadiums \u2013 all fitted into a handy size.<br\/><br\/>The combination of passive isolation with highest possible signal fidelity is only realisable thanks to its core, existing of two LEHLE TRANSFORMER HZ, which galvanically isolate the signals.<br\/>While being designed especially for high impedance signals, they process low impedance signals with the same uncompromising sound quality as well. The high coupling and flat frequency response won\u2019t let you miss any detail in the signal.<br\/><br\/>The classic application for the LEHLE P-ISO TRS XLR STEREO is the connecting link in between your stereo device and the professional world of mixers, FOH and DAW recording systems.<br\/>It lifts the ground in between those worlds, so the devices are galvanically isolated &#8211; any hum or noise caused by a ground loop becomes a thing of the past.<br\/><br\/>Offering balanced audio signals at the two male XLR sockets by Neutrik gets you protected even closer to the mixer while using simple standard XLR cables.<br\/><br\/>Not only for stereo effects, digital modeler and amp simulation devices &#8211; even keyboards, synths, playback systems or audio interfaces are in safe hands of the LEHLE P-ISO TRS XLR STEREO.<br\/>You won\u2019t find a power connection as you get all the performance of that compact box passively, without the need for a power supply.<br\/><br\/>And due to its optimised size and low weight, it fits easily below your pedalboard or in any pocket &#8211; always installed or as flexible tool to share (if you really want).<\/p>\n<\/div><\/div><div id=\"6884\" class=\"ininebodyinner\"><h3 class=\"inline-pagetitle\">Technical data<span class=\"inlinedoc-postlink inner\" onclick=\"prompt('Press Ctrl + C, then Enter to copy to clipboard','https:\/\/support.lehle.com\/en\/manual\/lehle-p-iso-trs-xlr-stereo#6884')\">#<\/span><\/h3><div class=\"entry-content clearfix\"><div id=\"toctoc\"><\/div>\n<figure class=\"wp-block-table\"><table><tbody><tr><td>Weight<\/td><td>428 g<\/td><\/tr><tr><td>Length<\/td><td>72 mm<\/td><\/tr><tr><td>Width<\/td><td>94 mm<\/td><\/tr><tr><td>Overall height<\/td><td>35 mm<\/td><\/tr><tr><td>Max. Level <\/td><td>7.7 V RMS \/ 20 dBu (THD &lt; 1%, 50Hz &#8211; 20 kHz)<\/td><\/tr><tr><td>Total harmonic distortion<\/td><td>0,003 % (0 dBu, 1 kHz)<\/td><\/tr><tr><td>Frequency range<\/td><td>20 Hz &#8211; 100 kHz -0.1\/ +0.4 dB<br\/>(source 600 \u03a9, load 1 M\u03a9)<\/td><\/tr><tr><td>Input impedance <br\/>(transformer load impedance)<\/td><td>min. 2 M\u03a9 at 2 kHz  <\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div><\/div><\/div><div id=\"6886\" class=\"ininebody padding-bottom-45\" ><div class=\"page-title-header\"><h2 class=\"inline-pagetitle\">Signal routing<span class=\"inlinedoc-postlink\" onclick=\"prompt('Press Ctrl + C, then Enter to copy to clipboard','https:\/\/support.lehle.com\/en\/manual\/signal-flow-diagram-12#6886')\">#<\/span><\/h2><\/div><div class=\"post-cat margin-btm-35\"><\/div><div class=\"entry-content clearfix\"><div id=\"toctoc\"><\/div>\n<\/div><div id=\"6887\" class=\"ininebodyinner\"><h3 class=\"inline-pagetitle\">Unbalanced Signal Routing<span class=\"inlinedoc-postlink inner\" onclick=\"prompt('Press Ctrl + C, then Enter to copy to clipboard','https:\/\/support.lehle.com\/en\/manual\/signal-routing-4#6887')\">#<\/span><\/h3><div class=\"entry-content clearfix\"><div id=\"toctoc\"><\/div>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p>Unbalanced signal lines predominate when instruments such as guitars, basses and keyboards are used. <\/p>\n\n\n\n<p>These signal lines have two conducting cores. <\/p>\n\n\n\n<p>The signal itself is present on the signal conductor and is connected to the tip of the jack plug. <\/p>\n\n\n\n<p>The second core, which is connected to the sleeve of the jack plug, screens the signal conductor and constitutes the signal ground.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/support.lehle.com\/wp-content\/uploads\/2024\/07\/Asymmetrisch_EN.svg\" alt=\"\" class=\"wp-image-2956\"\/><\/figure>\n<\/div>\n<\/div>\n\n<h2 class=\"wp-block-heading\">UNBALANCED SIGNAL ROUTING<\/h2>\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>JACK<\/td><td>CABLE<\/td><td>JACK<\/td><\/tr><tr><td>Sleeve<\/td><td>Ground<\/td><td>Sleeve<\/td><\/tr><tr><td>Tip<\/td><td>Signal in phase<\/td><td>Tip<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div><\/div><div id=\"6889\" class=\"ininebodyinner\"><h3 class=\"inline-pagetitle\">Balanced Signal Routing<span class=\"inlinedoc-postlink inner\" onclick=\"prompt('Press Ctrl + C, then Enter to copy to clipboard','https:\/\/support.lehle.com\/en\/manual\/signal-routing-4#6889')\">#<\/span><\/h3><div class=\"entry-content clearfix\"><div id=\"toctoc\"><\/div>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p>Balanced signal lines are used to cross larger distances without interference. <\/p>\n\n\n\n<p>They are generally fitted with XLR connectors or TRS (Tip Ring Sleeve) jack plugs.<\/p>\n\n\n\n<p>Here, three cores are required: <br\/>there are two signal conductors. <\/p>\n\n\n\n<p>In a balanced signal line, the signal is present in phase at the tip, as in the case of an unbalanced signal line (XLR Pin 2). The second signal conductor carries the same signal, but with the opposite polarity or mirror-image phase (Ring, XLR Pin 3). The third conductor is the screening, and again constitutes the signal ground (Sleeve, XLR Pin 1).<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/support.lehle.com\/wp-content\/uploads\/2024\/07\/Symmetrisch.svg\" alt=\"\" class=\"wp-image-2883\"\/><\/figure>\n<\/div>\n<\/div>\n\n<h2 class=\"wp-block-heading\">BALANCED SIGNAL ROUTING<\/h2>\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>JACK<\/td><td>CABLE<\/td><td>XLR<\/td><\/tr><tr><td>Sleeve<\/td><td>Ground<\/td><td>Pin 1<\/td><\/tr><tr><td>Ring<\/td><td>Signal in mirrored phase<\/td><td>Pin 3<\/td><\/tr><tr><td>Tip<\/td><td>Signal in phase<\/td><td>Pin 2<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div><\/div><\/div><div id=\"6898\" class=\"ininebody padding-bottom-45\" ><div class=\"page-title-header\"><h2 class=\"inline-pagetitle\">General description<span class=\"inlinedoc-postlink\" onclick=\"prompt('Press Ctrl + C, then Enter to copy to clipboard','https:\/\/support.lehle.com\/en\/manual\/signal-flow-diagram-12#6898')\">#<\/span><\/h2><\/div><div class=\"post-cat margin-btm-35\"><\/div><div class=\"entry-content clearfix\"><div id=\"toctoc\"><\/div>\n<div class=\"wp-block-getwid-image-hotspot\" data-appearance-animation=\"none\" data-image-points=\"[{&quot;link&quot;:&quot;#outputsocket&quot;,&quot;icon&quot;:&quot;fas fa-circle&quot;,&quot;title&quot;:&quot;3. OUTPUT SOCKET&quot;,&quot;color&quot;:&quot;&quot;,&quot;content&quot;:&quot;&quot;,&quot;backgroundColor&quot;:&quot;&quot;,&quot;newTab&quot;:false,&quot;popUpOpen&quot;:false,&quot;popUpWidth&quot;:350,&quot;placement&quot;:&quot;top&quot;,&quot;position&quot;:{&quot;x&quot;:&quot;43%&quot;,&quot;y&quot;:&quot;17.5%&quot;}},{&quot;link&quot;:&quot;#outputsocket&quot;,&quot;icon&quot;:&quot;fas fa-circle&quot;,&quot;title&quot;:&quot;3. OUTPUT SOCKET&quot;,&quot;color&quot;:&quot;&quot;,&quot;content&quot;:&quot;&quot;,&quot;backgroundColor&quot;:&quot;&quot;,&quot;newTab&quot;:false,&quot;popUpOpen&quot;:false,&quot;popUpWidth&quot;:350,&quot;placement&quot;:&quot;top&quot;,&quot;position&quot;:{&quot;x&quot;:&quot;31.5%&quot;,&quot;y&quot;:&quot;17.5%&quot;}},{&quot;link&quot;:&quot;#inputsocket&quot;,&quot;icon&quot;:&quot;fas fa-circle&quot;,&quot;title&quot;:&quot;1. INPUT SOCKET&quot;,&quot;color&quot;:&quot;&quot;,&quot;content&quot;:&quot;&quot;,&quot;backgroundColor&quot;:&quot;&quot;,&quot;newTab&quot;:false,&quot;popUpOpen&quot;:false,&quot;popUpWidth&quot;:350,&quot;placement&quot;:&quot;top&quot;,&quot;position&quot;:{&quot;x&quot;:&quot;58%&quot;,&quot;y&quot;:&quot;15%&quot;}},{&quot;link&quot;:&quot;#inputsocket&quot;,&quot;icon&quot;:&quot;fas fa-circle&quot;,&quot;title&quot;:&quot;1. INPUT SOCKET&quot;,&quot;color&quot;:&quot;&quot;,&quot;content&quot;:&quot;&quot;,&quot;backgroundColor&quot;:&quot;&quot;,&quot;newTab&quot;:false,&quot;popUpOpen&quot;:false,&quot;popUpWidth&quot;:350,&quot;placement&quot;:&quot;top&quot;,&quot;position&quot;:{&quot;x&quot;:&quot;66.5%&quot;,&quot;y&quot;:&quot;15%&quot;}},{&quot;link&quot;:&quot;#groundswitch&quot;,&quot;icon&quot;:&quot;fas fa-circle&quot;,&quot;title&quot;:&quot;2. GROUND SWITCH&quot;,&quot;color&quot;:&quot;&quot;,&quot;content&quot;:&quot;&quot;,&quot;backgroundColor&quot;:&quot;&quot;,&quot;newTab&quot;:false,&quot;popUpOpen&quot;:false,&quot;popUpWidth&quot;:350,&quot;placement&quot;:&quot;top&quot;,&quot;position&quot;:{&quot;x&quot;:&quot;50.5%&quot;,&quot;y&quot;:&quot;15%&quot;}}]\" data-trigger=\"click\" data-theme=\"light\" data-tooltip-animation=\"shift-toward\" data-arrow=\"true\"><div class=\"wp-block-getwid-image-hotspot__wrapper\"><img loading=\"lazy\" decoding=\"async\" width=\"2560\" height=\"1707\" src=\"https:\/\/support.lehle.com\/wp-content\/uploads\/2025\/03\/1-1035-LEHLE-P-ISO-TRS-XLR-STEREO-06-scaled.jpg\" alt=\"\" class=\"wp-block-getwid-image-hotspot__image wp-image-6715\" srcset=\"https:\/\/support.lehle.com\/wp-content\/uploads\/2025\/03\/1-1035-LEHLE-P-ISO-TRS-XLR-STEREO-06-scaled.jpg 2560w, https:\/\/support.lehle.com\/wp-content\/uploads\/2025\/03\/1-1035-LEHLE-P-ISO-TRS-XLR-STEREO-06-300x200.jpg 300w, https:\/\/support.lehle.com\/wp-content\/uploads\/2025\/03\/1-1035-LEHLE-P-ISO-TRS-XLR-STEREO-06-1024x683.jpg 1024w, https:\/\/support.lehle.com\/wp-content\/uploads\/2025\/03\/1-1035-LEHLE-P-ISO-TRS-XLR-STEREO-06-768x512.jpg 768w, https:\/\/support.lehle.com\/wp-content\/uploads\/2025\/03\/1-1035-LEHLE-P-ISO-TRS-XLR-STEREO-06-1536x1024.jpg 1536w, https:\/\/support.lehle.com\/wp-content\/uploads\/2025\/03\/1-1035-LEHLE-P-ISO-TRS-XLR-STEREO-06-2048x1365.jpg 2048w\" sizes=\"auto, (max-width: 2560px) 100vw, 2560px\" \/><div data-point-id=\"0\" class=\"wp-block-getwid-image-hotspot__dot has-animation-pulse\" style=\"left:43%;top:17.5%\"><div class=\"wp-block-getwid-image-hotspot__dot-wrapper\"><div class=\"wp-block-getwid-image-hotspot__dot-content\"><i class=\"fas fa-circle wp-block-getwid-image-hotspot__dot-icon\"><\/i><\/div><\/div><div class=\"wp-block-getwid-image-hotspot__dot-description\"><div class=\"wp-block-getwid-image-hotspot__dot-title\"><a href=\"#outputsocket\">3. OUTPUT SOCKET<\/a><\/div><\/div><\/div><div data-point-id=\"1\" class=\"wp-block-getwid-image-hotspot__dot has-animation-pulse\" style=\"left:31.5%;top:17.5%\"><div class=\"wp-block-getwid-image-hotspot__dot-wrapper\"><div class=\"wp-block-getwid-image-hotspot__dot-content\"><i class=\"fas fa-circle wp-block-getwid-image-hotspot__dot-icon\"><\/i><\/div><\/div><div class=\"wp-block-getwid-image-hotspot__dot-description\"><div class=\"wp-block-getwid-image-hotspot__dot-title\"><a href=\"#outputsocket\">3. OUTPUT SOCKET<\/a><\/div><\/div><\/div><div data-point-id=\"2\" class=\"wp-block-getwid-image-hotspot__dot has-animation-pulse\" style=\"left:58%;top:15%\"><div class=\"wp-block-getwid-image-hotspot__dot-wrapper\"><div class=\"wp-block-getwid-image-hotspot__dot-content\"><i class=\"fas fa-circle wp-block-getwid-image-hotspot__dot-icon\"><\/i><\/div><\/div><div class=\"wp-block-getwid-image-hotspot__dot-description\"><div class=\"wp-block-getwid-image-hotspot__dot-title\"><a href=\"#inputsocket\">1. INPUT SOCKET<\/a><\/div><\/div><\/div><div data-point-id=\"3\" class=\"wp-block-getwid-image-hotspot__dot has-animation-pulse\" style=\"left:66.5%;top:15%\"><div class=\"wp-block-getwid-image-hotspot__dot-wrapper\"><div class=\"wp-block-getwid-image-hotspot__dot-content\"><i class=\"fas fa-circle wp-block-getwid-image-hotspot__dot-icon\"><\/i><\/div><\/div><div class=\"wp-block-getwid-image-hotspot__dot-description\"><div class=\"wp-block-getwid-image-hotspot__dot-title\"><a href=\"#inputsocket\">1. INPUT SOCKET<\/a><\/div><\/div><\/div><div data-point-id=\"4\" class=\"wp-block-getwid-image-hotspot__dot has-animation-pulse\" style=\"left:50.5%;top:15%\"><div class=\"wp-block-getwid-image-hotspot__dot-wrapper\"><div class=\"wp-block-getwid-image-hotspot__dot-content\"><i class=\"fas fa-circle wp-block-getwid-image-hotspot__dot-icon\"><\/i><\/div><\/div><div class=\"wp-block-getwid-image-hotspot__dot-description\"><div class=\"wp-block-getwid-image-hotspot__dot-title\"><a href=\"#groundswitch\">2. GROUND SWITCH<\/a><\/div><\/div><\/div><\/div><\/div>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-columns is-not-stacked-on-mobile mt-5 is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\" id=\"inputsocket\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:10%\">\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<figure class=\"wp-block-image size-full is-style-default\"><img decoding=\"async\" src=\"https:\/\/support.lehle.com\/wp-content\/uploads\/2024\/07\/Runter.svg\" alt=\"\" class=\"wp-image-2881\"\/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:90%\">\n<h4 class=\"wp-block-heading\">1. INPUT SOCKET&nbsp;<\/h4>\n\n\n\n<p>Connect the left and right output of your pedal board, modeler or amp simulation to these sockets.<\/p>\n\n\n\n<p>The LEHLE P-ISO TRS XLR STEREO operates entirely passively. The input signal remains connected to the outputs at all times, with no semiconductors or any other active components in the signal path.<\/p>\n\n\n\n<p>Both balanced and unbalanced signals can be split, since the LEHLE TRANSFORMER HZ is capable of handling both types.<\/p>\n\n\n\n<div class=\"wp-block-getwid-section check alert\"><div class=\"wp-block-getwid-section__wrapper getwid-justify-content-flex-start\"><div class=\"wp-block-getwid-section__inner-wrapper\"><div class=\"wp-block-getwid-section__background-holder\"><div class=\"wp-block-getwid-section__background\"><\/div><div class=\"wp-block-getwid-section__foreground\"><\/div><\/div><div class=\"wp-block-getwid-section__content\"><div class=\"wp-block-getwid-section__inner-content\">\n<p>If the INPUT SOCKET L is not occupied,\u00a0the signal of the INPUT SOCKET R will\u00a0automatically be mirrored.<br>This way you can split a mono signal to two galvanically isolated outputs.<\/p>\n<\/div><\/div><\/div><\/div><\/div>\n<\/div>\n<\/div>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-columns is-not-stacked-on-mobile mt-5 is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\" id=\"groundswitch\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:10%\">\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<figure class=\"wp-block-image size-full is-style-default\"><img decoding=\"async\" src=\"https:\/\/support.lehle.com\/wp-content\/uploads\/2024\/07\/Masse.svg\" alt=\"\" class=\"wp-image-2873\"\/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:90%\">\n<h4 class=\"wp-block-heading\">2. GROUND SWITCH<\/h4>\n\n\n\n<p>Connect the grounds of the INPUT and ISO output if necessary.<\/p>\n\n\n\n<p>Pressing this switch connects the ground conductors of the INPUT sockets and ISO outputs. Connecting the ground conductors of these can help in some situations, depending on the units connected and on their power supplies.<\/p>\n\n\n\n<p>Use the ground switch to find out for yourself the position in which noise is minimised.<\/p>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns is-not-stacked-on-mobile mt-5 is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\" id=\"outputsocket\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:10%\">\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<figure class=\"wp-block-image size-full is-style-default\"><img decoding=\"async\" src=\"https:\/\/support.lehle.com\/wp-content\/uploads\/2024\/07\/ISO.svg\" alt=\"\" class=\"wp-image-2871\"\/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:90%\">\n<h4 class=\"wp-block-heading\">3. OUTPUT SOCKET<\/h4>\n\n\n\n<p>Connect your audio inputs of a DAW or a mixer here.<\/p>\n\n\n\n<p>The ISO output has an input signal which is isolated by means of the LEHLE TRANSFORMER HZ.<\/p>\n\n\n\n<p>A balanced or an unbalanced signal is possible, irrespective of the type of signal fed from the input.<\/p>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<\/div>\n<\/div>\n\n\n\n<p><\/p>\n<\/div><\/div><div id=\"6895\" class=\"ininebody padding-bottom-45\" ><div class=\"page-title-header\"><h2 class=\"inline-pagetitle\">TYPICAL USES: LEHLE P-ISO TRS XLR STEREO<span class=\"inlinedoc-postlink\" onclick=\"prompt('Press Ctrl + C, then Enter to copy to clipboard','https:\/\/support.lehle.com\/en\/manual\/signal-flow-diagram-12#6895')\">#<\/span><\/h2><\/div><div class=\"post-cat margin-btm-35\"><\/div><div class=\"entry-content clearfix\"><div id=\"toctoc\"><\/div>\n<\/div><div id=\"6931\" class=\"ininebodyinner\"><h3 class=\"inline-pagetitle\">as isolator for effect devices<span class=\"inlinedoc-postlink inner\" onclick=\"prompt('Press Ctrl + C, then Enter to copy to clipboard','https:\/\/support.lehle.com\/en\/manual\/application-examples-lehle-p-iso-trs-xlr-stereo#6931')\">#<\/span><\/h3><div class=\"entry-content clearfix\"><div id=\"toctoc\"><\/div>\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"682\" src=\"https:\/\/support.lehle.com\/wp-content\/uploads\/2025\/06\/P-ISO-TRS-XLR-STEREO-ISOLATOR-EFFECTS-1024x682.jpg\" alt=\"\" class=\"wp-image-6879\" srcset=\"https:\/\/support.lehle.com\/wp-content\/uploads\/2025\/06\/P-ISO-TRS-XLR-STEREO-ISOLATOR-EFFECTS-1024x682.jpg 1024w, https:\/\/support.lehle.com\/wp-content\/uploads\/2025\/06\/P-ISO-TRS-XLR-STEREO-ISOLATOR-EFFECTS-300x200.jpg 300w, https:\/\/support.lehle.com\/wp-content\/uploads\/2025\/06\/P-ISO-TRS-XLR-STEREO-ISOLATOR-EFFECTS-768x512.jpg 768w, https:\/\/support.lehle.com\/wp-content\/uploads\/2025\/06\/P-ISO-TRS-XLR-STEREO-ISOLATOR-EFFECTS-1536x1024.jpg 1536w, https:\/\/support.lehle.com\/wp-content\/uploads\/2025\/06\/P-ISO-TRS-XLR-STEREO-ISOLATOR-EFFECTS.jpg 2000w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h4 class=\"wp-block-heading\">DEVICE CONNECTION<\/h4>\n\n\n\n<figure class=\"wp-block-table tabelleohne\"><table><tbody><tr><td><img decoding=\"async\" class=\"wp-image-2881\" style=\"width: NaNpx;\" src=\"https:\/\/support.lehle.com\/wp-content\/uploads\/2024\/07\/Runter.svg\" alt=\"\"\/><\/td><td>Output effects pedal<\/td><\/tr><tr><td><img decoding=\"async\" class=\"wp-image-2871\" style=\"width: NaNpx;\" src=\"https:\/\/support.lehle.com\/wp-content\/uploads\/2024\/07\/ISO.svg\" alt=\"\"\/><\/td><td>Input mixer<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n<\/div>\n\n<p>Background noise can often occur if you connect the stereo outputs of your effects pedal to a mixer. <\/p>\n\n<p>Here again, ground loops occur when units grounded by a protective earth conductor (\u201cPE conductor\u201d) are connected to each other. If you place the LEHLE P-ISO TRS XLR STEREO in between the effects pedal and the mixer, this connection is isolated and the noise eliminated. <\/p>\n\n<p>The signal connections can be either symmetrical or asymmetrical.<\/p>\n\n<h4 class=\"wp-block-heading\">HOW TO DO THIS:<\/h4>\n\n<ol class=\"wp-block-list\">\n<li>Connect the right output of the effects pedal to the right INPUT SOCKET of the LEHLE.<\/li>\n\n\n\n<li>Take the left output of the effects pedal and connect it to the left INPUT SOCKET of the LEHLE.<\/li>\n\n\n\n<li>Use the right R ISO output to connect to the right input of your mixer. Use balanced cables with XLR connectors.<\/li>\n\n\n\n<li>Now take the left L ISO output and connect it to the the left input of your mixer. Again with XLR and balanced cables. <\/li>\n\n\n\n<li>Use the ground lift switch to determine which position eliminates the most background noise.<\/li>\n\n\n\n<li>There you go!<\/li>\n<\/ol>\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<\/div><\/div><div id=\"6906\" class=\"ininebodyinner\"><h3 class=\"inline-pagetitle\">as isolator in the studio<span class=\"inlinedoc-postlink inner\" onclick=\"prompt('Press Ctrl + C, then Enter to copy to clipboard','https:\/\/support.lehle.com\/en\/manual\/application-examples-lehle-p-iso-trs-xlr-stereo#6906')\">#<\/span><\/h3><div class=\"entry-content clearfix\"><div id=\"toctoc\"><\/div>\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"682\" src=\"https:\/\/support.lehle.com\/wp-content\/uploads\/2025\/06\/P-ISO-TRS-XLR-STEREO-ISOLATOR-STUDIO-1024x682.jpg\" alt=\"\" class=\"wp-image-6864\" srcset=\"https:\/\/support.lehle.com\/wp-content\/uploads\/2025\/06\/P-ISO-TRS-XLR-STEREO-ISOLATOR-STUDIO-1024x682.jpg 1024w, https:\/\/support.lehle.com\/wp-content\/uploads\/2025\/06\/P-ISO-TRS-XLR-STEREO-ISOLATOR-STUDIO-300x200.jpg 300w, https:\/\/support.lehle.com\/wp-content\/uploads\/2025\/06\/P-ISO-TRS-XLR-STEREO-ISOLATOR-STUDIO-768x512.jpg 768w, https:\/\/support.lehle.com\/wp-content\/uploads\/2025\/06\/P-ISO-TRS-XLR-STEREO-ISOLATOR-STUDIO-1536x1024.jpg 1536w, https:\/\/support.lehle.com\/wp-content\/uploads\/2025\/06\/P-ISO-TRS-XLR-STEREO-ISOLATOR-STUDIO.jpg 2000w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h4 class=\"wp-block-heading\">DEVICE CONNECTION<\/h4>\n\n\n\n<figure class=\"wp-block-table tabelleohne\"><table><tbody><tr><td><img decoding=\"async\" class=\"wp-image-2881\" style=\"width: NaNpx;\" src=\"https:\/\/support.lehle.com\/wp-content\/uploads\/2024\/07\/Runter.svg\" alt=\"\"\/><\/td><td>Output preamp<\/td><\/tr><tr><td><img decoding=\"async\" class=\"wp-image-2871\" style=\"width: NaNpx;\" src=\"https:\/\/support.lehle.com\/wp-content\/uploads\/2024\/07\/ISO.svg\" alt=\"\"\/><\/td><td>Input Audio interface<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n<\/div>\n\n<p>If connecting a preamp or amp modeler to the audio interface generates a ground loop, causing undesirable noise, again this problem can be effectively eliminated using the LEHLE P-ISO TRS XLR STEREO. The built-in LEHLE TRANSFORMER HZ galvanically isolates the ground connections and offers a balanced signal to record.<\/p>\n\n<p>The signal connections can be either symmetrical or asymmetrical.<\/p>\n\n<h4 class=\"wp-block-heading\">HOW TO DO THIS:<\/h4>\n\n<ol class=\"wp-block-list\">\n<li>Connect the right output of the preamp to the right INPUT SOCKET of the LEHLE.<\/li>\n\n\n\n<li>Take the left output of the preamp and connect it to the left INPUT SOCKET of the LEHLE.<\/li>\n\n\n\n<li>Use the right R ISO output to connect to an input of your interface. Use balanced cables with XLR connectors.<\/li>\n\n\n\n<li>Now take the left L ISO output and connect it to another input of your interface. Again with XLR and balanced cables. <\/li>\n\n\n\n<li>Use the ground lift switch to determine which position eliminates the most background noise.<\/li>\n\n\n\n<li>There you go!<\/li>\n<\/ol>\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<\/div><\/div><div id=\"6908\" class=\"ininebodyinner\"><h3 class=\"inline-pagetitle\">as isolator in a stereo setup<span class=\"inlinedoc-postlink inner\" onclick=\"prompt('Press Ctrl + C, then Enter to copy to clipboard','https:\/\/support.lehle.com\/en\/manual\/application-examples-lehle-p-iso-trs-xlr-stereo#6908')\">#<\/span><\/h3><div class=\"entry-content clearfix\"><div id=\"toctoc\"><\/div>\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"682\" src=\"https:\/\/support.lehle.com\/wp-content\/uploads\/2025\/06\/P-ISO-TRS-XLR-STEREO-ISOLATOR-STEREO-SETUP-1-1024x682.jpg\" alt=\"\" class=\"wp-image-6860\" srcset=\"https:\/\/support.lehle.com\/wp-content\/uploads\/2025\/06\/P-ISO-TRS-XLR-STEREO-ISOLATOR-STEREO-SETUP-1-1024x682.jpg 1024w, https:\/\/support.lehle.com\/wp-content\/uploads\/2025\/06\/P-ISO-TRS-XLR-STEREO-ISOLATOR-STEREO-SETUP-1-300x200.jpg 300w, https:\/\/support.lehle.com\/wp-content\/uploads\/2025\/06\/P-ISO-TRS-XLR-STEREO-ISOLATOR-STEREO-SETUP-1-768x512.jpg 768w, https:\/\/support.lehle.com\/wp-content\/uploads\/2025\/06\/P-ISO-TRS-XLR-STEREO-ISOLATOR-STEREO-SETUP-1-1536x1024.jpg 1536w, https:\/\/support.lehle.com\/wp-content\/uploads\/2025\/06\/P-ISO-TRS-XLR-STEREO-ISOLATOR-STEREO-SETUP-1.jpg 2000w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h4 class=\"wp-block-heading\">DEVICE CONNECTION<\/h4>\n\n\n\n<figure class=\"wp-block-table tabelleohne\"><table><tbody><tr><td><img decoding=\"async\" class=\"wp-image-2881\" style=\"width: NaNpx;\" src=\"https:\/\/support.lehle.com\/wp-content\/uploads\/2024\/07\/Runter.svg\" alt=\"\"\/><\/td><td>Stereo outputs pedal board<\/td><\/tr><tr><td><img decoding=\"async\" class=\"wp-image-2871\" style=\"width: NaNpx;\" src=\"https:\/\/support.lehle.com\/wp-content\/uploads\/2024\/07\/ISO.svg\" alt=\"\"\/><\/td><td>Stereo inputs mixer<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n<\/div>\n\n<p>Background noise often occur when you connect the stereo outputs of your last device to the mixer or the stagebox \/ FOH. <\/p>\n\n<p>It not only converts your stereo audio signal to balanced XLR, but also lifts the ground, so there is no possibility for unwanted background noise or humming loops. Place the LEHLE P-ISO TRS XLR STEREO in between the output of your pedal board, modeler or amp simulation and the mixer or stagebox \/ FOH and this connection is isolated. <\/p>\n\n<p>The signal connections can be either symmetrical or asymmetrical. If your last device already offers balanced outputs, you can connect them balanced via TRS to the inputs of the LEHLE P-ISO TRS XLR STEREO.<\/p>\n\n<h4 class=\"wp-block-heading\">HOW TO DO THIS:<\/h4>\n\n<ol class=\"wp-block-list\">\n<li>Connect the right output of the last stereo pedal to the right INPUT SOCKET of the LEHLE.<\/li>\n\n\n\n<li>Take the left output of the pedal and connect it to the left INPUT SOCKET of the LEHLE.<\/li>\n\n\n\n<li>Use the right R ISO output to connect to the right input of your mixer. Use balanced cables with XLR connectors. <\/li>\n\n\n\n<li>Now take the left L ISO output and connect it to the the left input of your mixer. Again with XLR and balanced cables. <\/li>\n\n\n\n<li>Use the ground lift switch to determine which position eliminates the most background noise.<\/li>\n\n\n\n<li>There you go!<\/li>\n<\/ol>\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<\/div><\/div><div id=\"6904\" class=\"ininebodyinner\"><h3 class=\"inline-pagetitle\">as isolator for keyboards and active speakers<span class=\"inlinedoc-postlink inner\" onclick=\"prompt('Press Ctrl + C, then Enter to copy to clipboard','https:\/\/support.lehle.com\/en\/manual\/application-examples-lehle-p-iso-trs-xlr-stereo#6904')\">#<\/span><\/h3><div class=\"entry-content clearfix\"><div id=\"toctoc\"><\/div>\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"682\" src=\"https:\/\/support.lehle.com\/wp-content\/uploads\/2025\/06\/P-ISO-TRS-XLR-STEREO-KEYS-SPEAKER-1024x682.jpg\" alt=\"\" class=\"wp-image-6868\" srcset=\"https:\/\/support.lehle.com\/wp-content\/uploads\/2025\/06\/P-ISO-TRS-XLR-STEREO-KEYS-SPEAKER-1024x682.jpg 1024w, https:\/\/support.lehle.com\/wp-content\/uploads\/2025\/06\/P-ISO-TRS-XLR-STEREO-KEYS-SPEAKER-300x200.jpg 300w, https:\/\/support.lehle.com\/wp-content\/uploads\/2025\/06\/P-ISO-TRS-XLR-STEREO-KEYS-SPEAKER-768x512.jpg 768w, https:\/\/support.lehle.com\/wp-content\/uploads\/2025\/06\/P-ISO-TRS-XLR-STEREO-KEYS-SPEAKER-1536x1024.jpg 1536w, https:\/\/support.lehle.com\/wp-content\/uploads\/2025\/06\/P-ISO-TRS-XLR-STEREO-KEYS-SPEAKER.jpg 2000w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h4 class=\"wp-block-heading\">DEVICE CONNECTION<\/h4>\n\n\n\n<figure class=\"wp-block-table tabelleohne\"><table><tbody><tr><td><img decoding=\"async\" class=\"wp-image-2881\" style=\"width: NaNpx;\" src=\"https:\/\/support.lehle.com\/wp-content\/uploads\/2024\/07\/Runter.svg\" alt=\"\"\/><\/td><td>Output keyboard<\/td><\/tr><tr><td><img decoding=\"async\" class=\"wp-image-2871\" style=\"width: NaNpx;\" src=\"https:\/\/support.lehle.com\/wp-content\/uploads\/2024\/07\/ISO.svg\" alt=\"\"\/><\/td><td>Input speaker<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n<\/div>\n\n<p>The LEHLE P-ISO TRS XLR STEREO can be used in any scenario to eliminate noise resulting from ground loops or hum. Ground loops occur when units grounded by a protective earth conductor (\u201cPE conductor\u201d) are connected to each other. E.g. here a keyboard which is connected to two active speaker.  The protective earth conductor and the ground connection of the audio signal create a loop which will pick up external interference generated, for example, by coils. Such interference will impair the signal. The LEHLE TRANSFORMER HZ included in the LEHLE P-ISO galvanically isolates the ground connection. The hum loop is thus broken at this point.<\/p>\n\n<p>The signal connections can be either symmetrical or asymmetrical.<\/p>\n\n<h4 class=\"wp-block-heading\">HOW TO DO THIS:<\/h4>\n\n<ol class=\"wp-block-list\">\n<li>Connect the right output of your keyboard to the right input socket of the LEHLE.<\/li>\n\n\n\n<li>Connect the left output socket of your keyboard to the left input socket of the LEHLE.<\/li>\n\n\n\n<li>Use the right R ISO output to connect to the right speaker. Use balanced cables with XLR connectors.<\/li>\n\n\n\n<li>Now take the left L ISO output and connect it to the the left speaker. Again with XLR and balanced cables. <\/li>\n\n\n\n<li>Use the ground lift switch to determine which position eliminates the most background noise.<\/li>\n\n\n\n<li>There you go!<\/li>\n<\/ol>\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<\/div><\/div><\/div><div id=\"6910\" class=\"ininebody padding-bottom-45\" ><div class=\"page-title-header\"><h2 class=\"inline-pagetitle\">Signal flow diagram<span class=\"inlinedoc-postlink\" onclick=\"prompt('Press Ctrl + C, then Enter to copy to clipboard','https:\/\/support.lehle.com\/en\/manual\/signal-flow-diagram-12#6910')\">#<\/span><\/h2><\/div><div class=\"post-cat margin-btm-35\"><\/div><div class=\"entry-content clearfix\"><div id=\"toctoc\"><\/div>\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/support.lehle.com\/wp-content\/uploads\/2025\/06\/Signalflussdiagramm-LEHLE-P-ISO-TRS-XLR-STEREO-EN-V1.2.svg\" alt=\"\" class=\"wp-image-6872\"\/><\/figure>\n\n\n\n<p><\/p>\n<\/div><\/div><\/div><\/div><\/div>[\/vc_column][\/vc_row]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>[vc_row equal_height=&#8221;yes&#8221; row_content_display=&#8221;in_grid&#8221; row_content_display_align=&#8221;left&#8221; row_type=&#8221;row&#8221; stretch_row_type=&#8221;yes&#8221; css=&#8221;.vc_custom_1718966832697{margin-top: 3vh !important;}&#8221;][vc_column width=&#8221;1\/2&#8243;][vc_single_image image=&#8221;6708&#8243; img_size=&#8221;large&#8221;][\/vc_column][vc_column width=&#8221;1\/2&#8243;][vc_column_text] OPERATING INSTRUCTIONS LEHLE P-ISO TRS XLR STEREO [\/vc_column_text][\/vc_column][\/vc_row][vc_row row_content_display=&#8221;in_grid&#8221; row_content_display_align=&#8221;left&#8221; row_type=&#8221;row&#8221; stretch_row_type=&#8221;yes&#8221;][vc_column][\/vc_column][\/vc_row]<\/p>\n","protected":false},"author":5,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"inline_featured_image":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-6824","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/support.lehle.com\/en\/wp-json\/wp\/v2\/pages\/6824","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/support.lehle.com\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/support.lehle.com\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/support.lehle.com\/en\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/support.lehle.com\/en\/wp-json\/wp\/v2\/comments?post=6824"}],"version-history":[{"count":9,"href":"https:\/\/support.lehle.com\/en\/wp-json\/wp\/v2\/pages\/6824\/revisions"}],"predecessor-version":[{"id":6927,"href":"https:\/\/support.lehle.com\/en\/wp-json\/wp\/v2\/pages\/6824\/revisions\/6927"}],"wp:attachment":[{"href":"https:\/\/support.lehle.com\/en\/wp-json\/wp\/v2\/media?parent=6824"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}