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I have been collecting schematics for 30 years and 5 years ago I started make them available at my site but...

replies: 91 views: 143,898
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jokeramik 21st September 2022
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OK, something to spice up GeekZone = here is where we post images of the INSIDE of audio equipment. Disclaimer; any photo...

Tim Farrant
replies: 1,169 views: 604,920
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Rtroost 25th July 2022
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DSP Innovations has recently launched a FREE data sheet search site. The site, - Search Electronic Components ,...

replies: 19 views: 68,341
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msbettyhunt 27th March 2020
Avatar for jmauer42

A pet peeve of mine is shopping for gear in 2022 and something says it gives you warm juicy fat tube tone and it doesn't tell you...

replies: 5 views: 77
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jmauer42 9 hours ago
Avatar for kinghaigy

Hey all, I've been messing with a free pair of Rokit 4 G3 monitors that the previous owner had issues with one dying. I've...

replies: 4 views: 87
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audiospecific 13 hours ago
Avatar for David Kulka

I’m very sad to announce the recent passing of Cary Altschuler, our long time tech and my good friend. I got to know Cary...

David Kulka
replies: 0 views: 44
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David Kulka 15 hours ago
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These three Alps potentiometers have the exact same dimensions. Are they interchangeable? What do the marking mean? first one:...

replies: 1 views: 61
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gyraf 17 hours ago
Avatar for cat alley

Hello, Connectors are provided on the input PCB of the Soundcraft Series 5 for wiring input transformers to the Hi-Z and XLR...

cat alley
replies: 15 views: 2,714
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Annex2 1 day ago
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Hi all. I hope this is the right place for this post but apologies if I've got that wrong. I am encountering a very specific...

replies: 24 views: 442
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audiospecific 1 day ago
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Hi everyone, over time I noticed my Lewitt LCT440 Pure started exhibiting a very hight noise floor, along with some occasional...

replies: 14 views: 225
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chris661 1 day ago
Avatar for Nahuel

Ok I just called Shenneiser and they're asking a huge amount of money to replace my m147 seems like the tube is a 6111,...

replies: 50 views: 17,859
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Hymnographer 1 day ago
Avatar for jaques

So I'm a complete beginner when it comes to the assembly of anything electronic. However I saw this microphone where I could...

replies: 1 views: 56
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Thomas W. Bethe 1 day ago
Avatar for MSR74

I am possibly interested in purchasing a Presonus Eureka. I was initially interested in an SPL Track One or a Mindprint Envoice...

replies: 24 views: 12,332
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play.exe 1 day ago
Avatar for Brent Hahn

I have an old UTC H-23 transformer. The connections diagram refers to "center tap," but it has no center tap lug. Do...

Brent Hahn
replies: 8 views: 208
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audiospecific 2 days ago
Avatar for Audio Related

Hello Audio Geeks, As some of you may know we bought the majority of TL Audio spares when Tim @ Sonic Solutions died, a sad...

Audio Related
replies: 0 views: 59
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Audio Related 2 days ago
Avatar for bagpuss22

Hi all, I am after a schematic for the KRK Rokit 5 G3 as I have a unit in from a friend that is not providing any sound. He was...

replies: 1 views: 364
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kinghaigy 2 days ago
Avatar for DannyMA

Hi all, Hoping someone can help; I’ve got a Studer A807 that was running very smoothly, but recently on power up it...

replies: 9 views: 206
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briczo 2 days ago
Avatar for bugchild

Hi I’ve been absent from this forum for a while and I don’t no if this is the place to ask this but I have an old Dynacord...

replies: 1 views: 65
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Thomas W. Bethe 3 days ago
Avatar for Mandelscope

So ive built a 3 channel L by 3 channel R mixer for my home rig. Until I can buy a real mixer. Im using a bluetooth stereo...

replies: 5 views: 94
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Mandelscope 3 days ago
Avatar for swild

I have a KRK10s that has been diagnosed with a bad volume controller. This is the part that it calls for:...

replies: 3 views: 104
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The Count 4 days ago
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Hi all, Been working on a MIDI controller for a bit and I got to spend quite a bit of time trying to get the best of the TP/9S...

replies: 0 views: 40
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bruno_z 4 days ago
Avatar for Joe_caithness

Hi, I just bought an original TC Finalizer Wizard Series, on plugging it in it sparked, made a little pop noise and...

replies: 24 views: 4,305
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Felipesku 5 days ago
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Hi everyone, I have been experiencing a problem with one of my genelec 8040a, the tweeter is making a little electric noise...

replies: 2 views: 117
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sahink 6 days ago
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Hey all. Would love some help or troubleshooting advice as I don't know what else to do any more. I've been doing studio stuff...

replies: 28 views: 601
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JohnRoberts 6 days ago
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Hello, Last year i bought a Delta 200 mixer. A few weeks ago there was a problem with the master channelstrip. When i...

replies: 18 views: 4,996
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Tripwave 6 days ago
Avatar for JoaT

Awrite.. I aquired a broken Lexicon pcm91 which I'm in the process of restoring. So far everything seems to be fine, except the...

replies: 31 views: 2,605
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mc1510 6 days ago
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I first posted this in "So Much Gear, So Little Time" but got no responses. I measured the relative gains of the 8...

replies: 0 views: 38
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ChipBurns 1 week ago
Avatar for Antony Scott

Hi gearfriends, let me share my repair video, which may be useful for many owners of a fairly popular Otari MX-5050 BII...

Antony Scott
replies: 2 views: 475
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Kappeyne 1 week ago
Avatar for Buddhaman

Eveanna and fellow gearslutz, does anyone know of a combination plug that will fit into one of these Combo plugs and...

replies: 11 views: 9,877
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Shredente 1 week ago
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Hi Forum This is my first post here and I hope that I am posting in the right section, if not apologies to the mods. I...

replies: 24 views: 7,068
Avatar for audiospecific
audiospecific 1 week ago
Avatar for gmel555

Have been on a search for a 47 type tube mic for a while and have landed on the Pearlman TM-47. I’ve gone down the tube...

replies: 1 views: 67
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gyraf 1 week ago
Avatar for QueenSisi

Microphone question “Somewhat newbie” Hi what is the biggest advantage of transformerbased mics 1 somewhat tube sound...

replies: 21 views: 570
Avatar for audiospecific
audiospecific 1 week ago
Avatar for Can_Br

Hi Guys, I would like to know if anyone has had a similar problem and could help. I have a Neumann KMR81 and for a few days it...

replies: 1 views: 81
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Thomas W. Bethe 1 week ago
Avatar for HardRubbish

Looking for a downloadable set of manual/schematics for an Otari MX7300 and remote. I have tried PM'ing people offering in some...

replies: 7 views: 965
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Javierochoa 1 week ago
Avatar for Mo Facta

Hi all, I know there are a few Chilton QM series console owners on here so I am here to ask for a favour. In short, I am...

Mo Facta
replies: 11 views: 3,299
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Gravity 1 week ago
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Hi, Couple weeks ago I bought an old Fernandes Stratocaster guitar (80's I think) and my friend who repairs guitars took care...

replies: 8 views: 12,017
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Big Noyzz 1 week ago
Avatar for demonfuzz

Wondering if this would be a good power supply for audio projects. In this case a Turntable motor & Amp that call for...

replies: 3 views: 134
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demonfuzz 1 week ago
Avatar for andrewpauly

Hi! I have a Fender Chorus Amp with a couple of issues. The first one being that the right channel output sounds funky. I hooked...

replies: 14 views: 319
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audiospecific 1 week ago
Avatar for muziekschuur

Hi all. Just got an Schaller Echo Sound in. It is a echo disc unit. The alu solid disc is covered in a brown paint. It has the...

replies: 53 views: 11,153
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Luman 1 week ago
Avatar for s.d.finley

Hi all, I have an 1176 revF my tech is looking at. We have the original schematics from Urei but IC1 is listed as a UREI part...

replies: 4 views: 196
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cathode 1 week ago
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sorry to ask this question, but i am still unclear after doing some searching. it was suggested to me that maybe my unbalance...

replies: 13 views: 39,162
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David Rick 1 week ago
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Scans of my handwritten copies of two Audio Technica mic power modules; the actual schems are not online anymore and I don't have...

replies: 11 views: 300
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audiospecific 1 week ago
Avatar for Thomas W. Bethe

This works GREAT. More expensive than normal but it does a perfect job of removing...

Thomas W. Bethe
replies: 7 views: 438
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oldgearguy 1 week ago
Avatar for alba359

Hello guys, Any help is greatly appreciated. I have a Behringer Ultra Curve Pro 8024 with low battery warning. Can anyone advise...

replies: 4 views: 2,072
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Thomas W. Bethe 1 week ago
Avatar for lioncrew

Hello Everyone, I recently got my hands on a Boss RAD-50 rackmount for Micro Rack half-size effects. I've been using the RDD20...

replies: 0 views: 100
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lioncrew 1 week ago
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Hello, I am trying to program a multi band gate. I was hoping to get some help with finding resources for the math involved. I am...

replies: 1 views: 101
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gyraf 1 week ago
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Hi there Geekslutz! I am in search of the service manual for the Audio Technica RMX64 cassette recorder. I would appreciate...

replies: 6 views: 901
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pyronet83 1 week ago
Avatar for BCPM_Custom

Hey everyone, Years ago, while reading some engineering literature I came across mention of the practice of gating 60Hz...

replies: 3 views: 163
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BCPM_Custom 1 week ago
Avatar for CarbonaraStudios

Hello Guys, anybody here who can help me repair my BAE 1073. The Input Gain Switch is broken and doesnt work anymore. I´ve...

replies: 3 views: 151
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audiospecific 1 week ago
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Hello everyone, I come here because I have a technical problem and I can't get out of it. I recently acquired a "behringer...

replies: 2 views: 110
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audiospecific 1 week ago
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Hello! I'll get right to the point here. Let's say i want to take a desktop processor/effect unit (i.e. analog heat, soma...

exhume 2 consume
replies: 0 views: 99
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exhume 2 consume 1 week ago
Avatar for Thomas W. Bethe

The local college used to have some students in their physics department who were interested in learning about audio electronics....

Thomas W. Bethe
replies: 61 views: 1,750
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Thomas W. Bethe 1 week ago
Avatar for London Bridge St

Hello everyone, I am wondering if anyone here in the thread has had issues with their AWS 900 randomly rebooting? It seems to...

London Bridge St
replies: 3 views: 270
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stibernik 2 weeks ago