{"id":5725,"date":"2026-01-11T00:09:03","date_gmt":"2026-01-10T23:09:03","guid":{"rendered":"https:\/\/cbrell.de\/blog\/?p=5725"},"modified":"2026-01-23T11:40:38","modified_gmt":"2026-01-23T10:40:38","slug":"ebass-hacks-amp-headphone-attenuator","status":"publish","type":"post","link":"https:\/\/cbrell.de\/blog\/ebass-hacks-amp-headphone-attenuator\/","title":{"rendered":"Ebass Hacks: Amp Headphone Attenuator"},"content":{"rendered":"<p><em>DE: Manchmal w\u00e4re es praktisch, die ganze Klangkette Ebass \/ Gitarre -&gt; Pedalboard -&gt; Verst\u00e4rker in Zimmerlautst\u00e4rke und ohne den Einfluss der Box mit einem Kopfh\u00f6rer testen zu k\u00f6nnen. Oder man braucht f\u00fcr eine Aufnahme ein Line-taugliches Signal aus dem Ausgang des alten R\u00f6hrenverst\u00e4rkers. Dazu ist ein Attenuator (Signal-Abschw\u00e4cher) hilfreich. Dieser ist schnell zusammengebaut &#8211; hier ist die Bauanleitung.<\/em><\/p>\n<p><em>Das Titelbild zeigt den Amp Headphone Attenuator (Verst\u00e4rker zu Kopfh\u00f6rer Abschw\u00e4cher) fertig aufgebaut im 3D-Druck-Geh\u00e4use auf einem 700 Watt Ebass-Digitalverst\u00e4rker neben einer 100 Watt Gitarrenendstufe. Damit k\u00f6nnen auch komplexere Einstellungen und Austesten der Send-Return-Anschl\u00fcsse zuhause ohne Boxenschleppen* vorgenommen werden.<\/em><\/p>\n<p><em>EN: Sometimes it would be useful to be able to test the entire sound chain (electric bass\/guitar -&gt; pedalboard -&gt; amplifier) at room volume and without the influence of the speaker cabinet using headphones. Or you may need a line-compatible signal from the output of your old tube amplifier for a recording. An attenuator (signal attenuator) is helpful for this. This is quick to assemble \u2013 here are the instructions.<\/em><\/p>\n<p><em>The cover photo shows the amp headphone attenuator fully assembled in a 3D-printed casing on a 700-watt electric bass digital amplifier next to a 100-watt guitar power amplifier. This allows you to make more complex settings and test the send-return connections at home without having to lug around speakers.<\/em><\/p>\n<p><em>(*) Der Verst\u00e4rker treibt sonst eine <a href=\"https:\/\/cbrell.de\/blog\/ebass-box-umbau-18-zoll-speaker-thomann-the-box-500watt\/\">Box mit 18 Zoll Lautsprecher<\/a> und einem Gewicht von 36 kg an. Die Box bleibt besser im Probenraum.<\/em><\/p>\n<p>Ersterstellung 11.01.2026<br \/>\n\u00dcberarbeitung 22.01.2026<\/p>\n<h2>Anschlussm\u00f6glichkeiten und Nutzung<\/h2>\n<p>Der Amp Headphone Attenuator hat einen 6,3mm Mono-Klinkenanschluss f\u00fcr den Verst\u00e4rkerausgang und zwei Anschl\u00fcsse in Stereoklinke 3,5mm und 6,3mm. Somit k\u00f6nnen Kopfh\u00f6rer mit unterschiedlichen Anschl\u00fcssen verwendet werden. Einfache Ohrh\u00f6rer f\u00fcr das Handy tun es auch. Das Mono-Signal des Verst\u00e4rkers gelangt zu gleichen Teilen auf die beiden Kopfh\u00f6rer-Stereoausg\u00e4nge, ist also kein echtes Stereo.<\/p>\n<p>Die Leuchtdioden zeigen das Verst\u00e4rkersignal ab etwa 2,4V mit einem leichten Glimmen an. Am Kopfh\u00f6rerausgang kommen dann etwa 0,2V heraus, etwas weniger bei niederohmigen Kopfh\u00f6rern.<\/p>\n<p>Es ist auch m\u00f6glich, ein Aufnahmeger\u00e4t an die 3,5mm Buchse anzuschlie\u00dfen und parallel an 6,3mm einen Kopfh\u00f6rer. Das w\u00e4re dann sinnvoll, wenn man den Originalklang seines alten R\u00f6hrenverst\u00e4rkers auf die Aufnahme bannen will. Das ist authentischer als eine Amp-Simulation in der Aufnahmesoftware.<\/p>\n<p>Der Abschw\u00e4cher arbeitet rein passiv und ben\u00f6tigt keine Batterien.<\/p>\n<h2>EN: Connection options and use<\/h2>\n<p>The Amp Headphone Attenuator has the following connections:<br \/>\n&#8211; 6.3 mm mono jack for the amplifier output<br \/>\n&#8211; Two stereo jack connections: 3.5 mm and 6.3 mm This means that headphones with different connections can be used. Even simple earphones for mobile phones will work. However, as the mono signal from the amplifier is sent equally to both stereo headphone outputs, it is not true stereo.<\/p>\n<p>The LEDs indicate the amplifier signal with a slight glow from approximately 2.4 V. The headphone output then provides an output of approximately 0.2 V, which is slightly less for low-impedance headphones.<\/p>\n<p>You can also connect a recording device to the 3.5 mm jack and headphones to the 6.3 mm jack in parallel. This would be useful if you want to capture the original sound of your old tube amplifier in your recording. This is more authentic than using an amp simulation in recording software.<\/p>\n<p>The attenuator is purely passive and does not require batteries.<\/p>\n<h2>Aufbau<\/h2>\n<p>Der Aufbau erfolgt \u201efliegend\u201c. Die Bauteileliste gibt Liste 1 wieder. Die stabilen 6,3mm Klinkenbuchsen dienen als Tr\u00e4ger f\u00fcr die \u00fcbrigen Bauteile.<\/p>\n<p>Zun\u00e4chst werden die acht 470 Ohm Widerst\u00e4nde in zwei Gruppen zu je 4 parallel verl\u00f6tet und in Schrumpfschlauch gepackt. Die Leuchtdioden finden Halt auf einem St\u00fcck Schaltdraht am Masseanschluss der Klinkenbuchse.<\/p>\n<p>Die 10 Ohm Widerst\u00e4nde werden direkt an die 3,5mm Klinkenbuchse gel\u00f6tet. Die 6,3mm Klinkenbuchse wird mit d\u00fcnner Litze einfach dazu parallel geschaltet.<span class=\"Apple-converted-space\">\u00a0<\/span><\/p>\n<h2>EN: Assembly<\/h2>\n<p>Assembly is carried out &#8218;on the fly&#8216;. The components are listed in List 1 and the sturdy 6.3 mm jack sockets serve as supports for them.<\/p>\n<p>First, eight 470 \u03a9 resistors are soldered in parallel in two groups of four and placed in heat-shrink tubing. The light-emitting diodes are held in place on a piece of connecting wire at the ground connection of the jack socket.<\/p>\n<p>The 10 \u03a9 resistors are soldered directly to the 3.5 mm jack socket. The 6.3 mm jack socket is connected in parallel with thin stranded wire.<\/p>\n<p><a href=\"https:\/\/cbrell.de\/blog\/wp-content\/uploads\/2026\/01\/Amp-Headphone-Attenuator-erste-Skizze.jpg\"><img decoding=\"async\" class=\"alignnone size-full wp-image-5728\" src=\"https:\/\/cbrell.de\/blog\/wp-content\/uploads\/2026\/01\/Amp-Headphone-Attenuator-erste-Skizze.jpg\" alt=\"\" width=\"1024\" height=\"884\" srcset=\"https:\/\/cbrell.de\/blog\/wp-content\/uploads\/2026\/01\/Amp-Headphone-Attenuator-erste-Skizze.jpg 1024w, https:\/\/cbrell.de\/blog\/wp-content\/uploads\/2026\/01\/Amp-Headphone-Attenuator-erste-Skizze-300x259.jpg 300w, https:\/\/cbrell.de\/blog\/wp-content\/uploads\/2026\/01\/Amp-Headphone-Attenuator-erste-Skizze-768x663.jpg 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<p>Abb. 1: Erste grobe Skizze f\u00fcr das Geh\u00e4use<br \/>\nFig. 1: Initial rough sketch for the casing<\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/cbrell.de\/blog\/wp-content\/uploads\/2026\/01\/Amp-Headphone-Attenuator-Geraet-fertig.jpg\"><img decoding=\"async\" class=\"alignnone size-full wp-image-5727\" src=\"https:\/\/cbrell.de\/blog\/wp-content\/uploads\/2026\/01\/Amp-Headphone-Attenuator-Geraet-fertig.jpg\" alt=\"\" width=\"1024\" height=\"576\" srcset=\"https:\/\/cbrell.de\/blog\/wp-content\/uploads\/2026\/01\/Amp-Headphone-Attenuator-Geraet-fertig.jpg 1024w, https:\/\/cbrell.de\/blog\/wp-content\/uploads\/2026\/01\/Amp-Headphone-Attenuator-Geraet-fertig-300x169.jpg 300w, https:\/\/cbrell.de\/blog\/wp-content\/uploads\/2026\/01\/Amp-Headphone-Attenuator-Geraet-fertig-768x432.jpg 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<p>Abb. 2: Das fertige kleine Ger\u00e4t mit einem Geh\u00e4use aus dem 3D-Drucker<br \/>\nFig. 2: The finished small device with a casing from the 3D printer<\/p>\n<p>Der sich daraus ergebende Spannungsteiler hat je Kanal einen Ausgangswiderstand von 10 Ohm, das liegt unter der Impedanz handels\u00fcblicher Kopfh\u00f6rer und hat sich als ausreichend erwiesen.<\/p>\n<p>Der Eingangswiderstand liegt bei \u00fcber 120 Ohm, auch im Probenraumbetrieb k\u00f6nnte der Amp Headphone Attenuator parallel zu den Boxen &#8211; z.B. f\u00fcr Aufnahmen &#8211; betrieben werden. Die Endstufe wird kaum etwas davon merken.<\/p>\n<pre>8 St\u00fcck Widerst\u00e4nde 470 Ohm 0,25W (f\u00fcr Spannungsteiler)\r\n<span style=\"font-size: inherit; font-style: inherit; font-variant-caps: inherit;\">2 St\u00fcck Widerst\u00e4nde 10 Ohm 0,25W (f\u00fcr Spannungsteiler)\r\n<\/span>2 St\u00fcck 6,3mm Klinkenbuchse, davon min. eine Stereo\r\n1 St\u00fcck Widerstand 2k2 0,25W (Vorwiderstand LEDs)\r\n1 St\u00fcck 3,5mm Klinkenbuchse Stereo\r\n1 St\u00fcck Leuchtdiode blau\r\n1 St\u00fcck Leuchtdiode rot\r\nEtwas Schaltdraht\r\nEtwas flexible Litze\r\nGeh\u00e4use z.B. aus dem 3D-Drucker<\/pre>\n<p>Liste 1: Bauteile. Man erh\u00e4lt die Bauteile leicht bei den \u00fcblichen Versendern Reichelt, Conrad, Mauser\u2026<\/p>\n<h2>Schaltplan<\/h2>\n<p>Die Schaltung ist denkbar einfach. Jeweils vier parallel geschaltete 470 Ohm-Widerst\u00e4nde bilden mit einem 10 Ohm Widerstand einen Spannungsteiler, der das Signal f\u00fcr den Kopfh\u00f6rer abschw\u00e4cht. Am Eingang sind \u00fcber einen 2,2 Kiloohm Widerstand zwei Leuchtdioden antiparallel geschaltet, sie geben eine optische Kontrolle \u00fcber das anliegende Signal. Das hat sich in der Vergangenheit als praktisch erwiesen. F\u00fcr die Grundfunktion des Abschw\u00e4chers k\u00f6nnten diese auch weggelassen werden.<span class=\"Apple-converted-space\">\u00a0<\/span><\/p>\n<h2>EN: Circuit diagram<\/h2>\n<p>The circuit is very simple. Four 470-ohm resistors connected in parallel form a voltage divider with a 10-ohm resistor, which reduces the signal strength for the headphones. Two light-emitting diodes connected in anti-parallel via a 2.2 k\u03a9 resistor provide visual control over the applied signal at the input. This has proven practical in the past. However, these could be omitted if the attenuator is to perform its basic function only.<\/p>\n<p><a href=\"https:\/\/cbrell.de\/blog\/wp-content\/uploads\/2026\/01\/Schaltplan-Amp-Headphone-Attenuator.png\"><img decoding=\"async\" class=\"alignnone size-full wp-image-5729\" src=\"https:\/\/cbrell.de\/blog\/wp-content\/uploads\/2026\/01\/Schaltplan-Amp-Headphone-Attenuator.png\" alt=\"\" width=\"1024\" height=\"576\" srcset=\"https:\/\/cbrell.de\/blog\/wp-content\/uploads\/2026\/01\/Schaltplan-Amp-Headphone-Attenuator.png 1024w, https:\/\/cbrell.de\/blog\/wp-content\/uploads\/2026\/01\/Schaltplan-Amp-Headphone-Attenuator-300x169.png 300w, https:\/\/cbrell.de\/blog\/wp-content\/uploads\/2026\/01\/Schaltplan-Amp-Headphone-Attenuator-768x432.png 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<p>Abb. 3 Schaltplan des Amp Headphone Attenuators. Zu sehen sind die beiden antiparallel geschalteten Leuchtdioden D1 und D2 mit dem strombegrenzenden Widerstand R5, R1 und R2 bestehen jeweils aus vier parallelgeschalteten Widerst\u00e4nden, um besser die W\u00e4rme abzuf\u00fchren, R1 und R3 sowie R2 und R4 bilden jeweils einen Spannungsteiler f\u00fcr die Abschw\u00e4chung.<br \/>\nFig. 3 Circuit diagram of the Amp Headphone Attenuator. The two anti-parallel connected light-emitting diodes D1 and D2 with the current-limiting resistor R5 can be seen. R1 and R2 each consist of four resistors connected in parallel to better dissipate heat. R1 and R3 as well as R2 and R4 each form a voltage divider for attenuation.<\/p>\n<h2>Geh\u00e4use<\/h2>\n<p>Das Geh\u00e4use ist einfach, wurde mit Tinkercad designed und besteht aus zwei Teilen:<\/p>\n<ol>\n<li>Das Geh\u00e4use, das die Elektronikkomponenten aufnimmt<\/li>\n<li>Eine Frontblende, die die Anschl\u00fcsse kennzeichnet<\/li>\n<\/ol>\n<p>Die Bauteile k\u00f6nnen mit jedem 3D-Drucker gedruckt werden. Die Frontblende wird besonders schick, wenn man nach 1,4mm die Filamentfarbe wechselt.<br \/>\nAls Drucker kam hier ein Bambu Lab P1S mit AMS und PETG-Filament von SUNLU zum Einsatz.<span class=\"Apple-converted-space\">\u00a0<\/span><\/p>\n<p>Die mit Tinkercad erstellen STL-Dateien f\u00fcr das Geh\u00e4use und die Frontblende kann man sich hier in einer ZIP-Datei herunterladen.<\/p>\n<h2>EN: Housing<\/h2>\n<div>The housing is simple and was designed using Tinkercad. It has two parts:<\/div>\n<div><\/div>\n<div>1. The box that holds the electronic parts.<\/div>\n<div>2. A front panel with labels for the connections.<\/div>\n<div><\/div>\n<div>You can print the parts using any 3D printer. The front panel looks really good if the filament colour is changed after 1.4 mm.<\/div>\n<div>A Bambu Lab P1S printer with AMS and PETG filament from SUNLU was used to print the object.<\/div>\n<div><\/div>\n<div>You can download the 3D-printed models (STL files) for the housing and front panel here. These were created with Tinkercad.<\/div>\n<div><\/div>\n<p><a href=\"https:\/\/cbrell.de\/blog\/wp-content\/uploads\/2026\/01\/Amp-Headphone-Attenuator-STL-Files-260111.zip\">ZIP-Archiv mit den STL-Dateien f\u00fcr das Geh\u00e4use zum Download<\/a><\/p>\n<h2>Funktionstests<\/h2>\n<h3>Trockentest im Arbeitszimmer<\/h3>\n<p>Der 700 Watt Verst\u00e4rker (Harley Benton Block 800B) bringt bei einem Sennheiser HD280 Pro (80 Ohm) eine angenehme Lautst\u00e4rke.<\/p>\n<p>Eine Gitarrenendstufe mit 100 Watt an 4 Ohm (Harley Benton GPA-100) mit zus\u00e4tzlichem Preamp kann ganz aufgedreht werden, die Lautst\u00e4rke im Kopfh\u00f6rer ist dann kurz unter der Schmerzgrenze.<\/p>\n<p>Beide Einstellungen erzeugen an gro\u00dfen Boxen brauchbare Probenraum-Lautst\u00e4rken.<span class=\"Apple-converted-space\">\u00a0<\/span><\/p>\n<p>Die LEDs flackern sch\u00f6n und geben auch ein optische R\u00fcckmeldung \u00fcber das Signal.<\/p>\n<h3>Tests im Probenraum<\/h3>\n<p>Tests mit den R\u00f6hrenverst\u00e4rkern im Probenraum und Aufnahmen als \u201eDI-Ersatz\u201c stehen noch aus.<\/p>\n<h2>EN: Tests to check how well the function works<\/h2>\n<p>The study involved a dry test.<\/p>\n<p>The amplifier (Harley Benton Block 800B) is 700 watts and the Sennheiser HD280 Pro headphones (80 ohms) are nice and loud.<\/p>\n<p>A 100-watt guitar amplifier (Harley Benton GPA-100) with an additional preamp can be turned up all the way, bringing the volume in the headphones to just below the pain threshold.<\/p>\n<p>Both settings produce enough volume for rehearsing on large speakers.<\/p>\n<p>The LEDs flicker nicely and also provide visual feedback about the signal.<\/p>\n<p>Tests in the room where the band rehearses.<\/p>\n<p>Tests with the tube amplifiers in the rehearsal room and recordings as a &#8218;DI replacement&#8216; are still pending.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/cbrell.de\/zaehler?x=8301\" \/><\/p>\n<div class=\"shariff shariff-align-flex-start shariff-widget-align-flex-start\" data-services=\"facebook\" data-url=\"https%3A%2F%2Fcbrell.de%2Fblog%2Febass-hacks-amp-headphone-attenuator%2F\" data-timestamp=\"1769168438\" data-backendurl=\"https:\/\/cbrell.de\/blog\/wp-json\/shariff\/v1\/share_counts?\"><div class=\"ShariffHeadline\">Teile diesen Beitrag.<\/div><ul class=\"shariff-buttons theme-round orientation-horizontal buttonsize-medium\"><li class=\"shariff-button twitter shariff-nocustomcolor\" style=\"background-color:#32bbf5\"><a href=\"https:\/\/twitter.com\/share?url=https%3A%2F%2Fcbrell.de%2Fblog%2Febass-hacks-amp-headphone-attenuator%2F&text=Ebass%20Hacks%3A%20Amp%20Headphone%20Attenuator\" title=\"Bei Twitter teilen\" aria-label=\"Bei Twitter teilen\" role=\"button\" rel=\"noopener nofollow\" class=\"shariff-link\" style=\"; 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Pedalboard -&gt; Verst\u00e4rker in Zimmerlautst\u00e4rke und ohne den Einfluss der Box mit einem Kopfh\u00f6rer testen zu k\u00f6nnen. Oder &#8230;<\/p>\n","protected":false},"author":1,"featured_media":5726,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[107,1356,1277,15,1354,1355],"class_list":["post-5725","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-allgemein","tag-3d-druck","tag-abschwaechen","tag-ebass","tag-elektronik","tag-kopfhoerer","tag-signal"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Ebass Hacks: Amp Headphone Attenuator - Bienen, Natur und Internet of Things<\/title>\n<meta name=\"description\" content=\"Amp Headphone Attenuator - Bauanleitung f\u00fcr einen passiven Abschw\u00e4cher, um einen Kopfh\u00f6rer direkt an einen Gitarrenverst\u00e4rker anzuschlie\u00dfen\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cbrell.de\/blog\/ebass-hacks-amp-headphone-attenuator\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ebass Hacks: Amp Headphone Attenuator - 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