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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: 1,174 views: 609,782
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phatbastard 21st December 2022
Avatar for MicroSonic

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

replies: 91 views: 146,756
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jokeramik 21st September 2022
Avatar for gabriel1

DSP Innovations has recently launched a FREE data sheet search site. The site, - Search Electronic Components ,...

replies: 19 views: 69,483
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msbettyhunt 27th March 2020
Avatar for David Kulka

I'm in the process of beefing up the UREI content on my website, and one often overlooked point that I will cover is termination....

David Kulka
replies: 90 views: 21,378
Avatar for Matt Syson
Matt Syson 51 minutes ago
Avatar for garronleslie

Hi all - I'm trying to locate a quality schematic for the ADA 8200 8ch ADAT interface. (plenty for the 8000) I'm looking to...

replies: 2 views: 236
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audiospecific 4 hours ago
Avatar for Seaclones

Hi everyone :) Based in the USA here. I bought a secondhand chameleon labs 7720 from Australia and it came with an Australian...

replies: 1 views: 77
Avatar for Thomas W. Bethe
Thomas W. Bethe 19 hours ago
Avatar for MLAudio

So I bought this preamp earlier this year (one of the first production pieces--payed $389 USD). I put it through its paces and...

replies: 88 views: 45,062
Avatar for EricCagle
EricCagle 1 day ago
Avatar for reprobyte

I was silly enough to store my Fostex PM1 in a hot space for a few years, and now I finally have a use for them I have found the...

replies: 2 views: 85
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reprobyte 1 day ago
Avatar for Rob2000

Hi guys! I would like to do a little mod to one of my microphone preamps and bypass all electrolytic caps in the audio path...

replies: 10 views: 386
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Rob2000 1 day ago
Avatar for Budda

I purchased a turntable that’s been a nightmare. Margules is the company and I don’t mind mentioning them to call them out on...

replies: 20 views: 317
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Budda 1 day ago
Avatar for Grimace

Original post is below. But I just wanted to update this in case anybody finds this in a search or whatever. The problem is...

replies: 52 views: 5,087
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AuldLangSine 1 day ago
Avatar for Chagalj

There has been alot of talk about importance of conversion in recording chain, and lots of people want to know which AD/DA chip...

replies: 591 views: 432,459
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kirkounet 2 days ago
Avatar for VitaEtMusica

Does anyone know if the microphone-parts RK-12 (sold on for $159) and the Rayking RK12 (sold on Alibaba for...

replies: 26 views: 5,133
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Dohreetoh 2 days ago
Avatar for trubadoor

Hello, I'm very new to using a soldering iron, but I've soldered a few hundred cable connectors so far and put together a...

replies: 44 views: 5,719
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cdkelly 3 days ago
Avatar for Beaucoup d’amour

Hi, I'm looking for R880 memory cards, but it seems they're impossible to find, so I was wondering if anyone knew about...

Beaucoup d’amour
replies: 14 views: 2,689
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Trigunaudio 3 days ago
Avatar for Coles Royce

Hi All - I have a new set of Dynaudio BM15A monitors which I quite like, but also have an unused Bryston 45 SST2 I'd love to use...

Coles Royce
replies: 4 views: 323
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anaudiopro 3 days ago
Avatar for anonyfous

Hello, I have spent weeks reverse engineering the Lexicon 300 GAL chip, finally I got it right. I am able to replicate the...

replies: 0 views: 53
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anonyfous 3 days ago
Avatar for boriscrispin

Hi Guys, I've look far and wide online - I simply cannot seem to find a downloadable manual or schematic for the...

replies: 15 views: 7,076
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analog_wizard 3 days ago
Avatar for Method Man

I received my unit from Thomann and two issues I am having: - VU gain reduction meter is not seating at 0 but around 2dB...

Method Man
replies: 18 views: 338
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Method Man 4 days ago
Avatar for WarmJetGuitar

Got myself a bag of 33uF 35v. Panasonic FR capacitors for the bias card on my Otari. But before I bother recapping the card I'd...

replies: 11 views: 381
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WarmJetGuitar 4 days ago
Avatar for MainTime

Hello I'm planning to recap my Pultec SP-3. Whant to change two electrolitic capatitors in it. One of them is in valve tube...

replies: 3 views: 643
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Eugene_Kei 4 days ago
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I am repainting mine and did some test panels of rustoleum gold hammertone spray paint 7210830 7210-830 as well as the Krylon...

jml designs
replies: 2 views: 123
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jml designs 4 days ago
Avatar for komysh

hi guys. I have a Neumann m147 kit. but when my tube will be blown (6s6b nos), I want to mod it to fet instead of lamp. why?...

replies: 1 views: 101
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Thomas W. Bethe 6 days ago
Avatar for polyspace

A couple years ago my Harbinger L802 mixer stopped working, and had that wonderful smell of burnt electronics. I put it in...

replies: 1 views: 70
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Thomas W. Bethe 6 days ago
Avatar for changeng

can someone point me in a direction to get a v67 modified and if you know, what are the differences before and after? thanks!

replies: 297 views: 115,580
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themicrophoneguy 1 week ago
Avatar for nervousfede

I'm having a small problem with an Eq I have built. I'ts a SS pultec stile eq. PCB designed by myself. It is working and I have...

replies: 18 views: 445
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kludgeaudio 1 week ago
Avatar for aliced25

hello everyone, I'd like to introduce MidiTraC... MidiTraC combines different device classes: * Step sequencer...

replies: 3 views: 573
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aliced25 1 week ago
Avatar for M50k

Got a couple of these USB-powered phantom power supplies to see if they'd be usable for non-critical auxiliary mics - they...

replies: 0 views: 82
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M50k 1 week ago
Avatar for MainTime

Hello, Silverstone wrote that it's possible to make a nice Di Box, which is used on Nashville studio, based on WE 111C ...

replies: 110 views: 25,988
Avatar for analoggg
analoggg 1 week ago
Avatar for jailhouse_frog

Hi! I've lurked this forum for years and it's finally time to actually post something that I couldn't find the answer to neither...

replies: 0 views: 71
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jailhouse_frog 1 week ago
Avatar for repro audio

Hi, I would greatly appreciate it if someone can send me schematics for the Auditronics DA6 distribution amplifier module. ...

repro audio
replies: 2 views: 905
Avatar for Cgastelu
Cgastelu 1 week ago
Avatar for play.exe

Hello fellow geeks! Would love to get some input/help for my tube mic's power supply. I just bought a tube mic from Luke...

replies: 14 views: 1,169
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mbrebes 1 week ago
Avatar for mckenzie126

I have a Waldorf Micro Q with one bad SRAM IC, the bad SRAM is one of 3 that the DSP uses. The SRAM is a GS72108TP-12 but its...

replies: 1 views: 105
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mbrebes 1 week ago
Avatar for ZRGuitarPickups

Hi there, I recently purchased a DBX 160A online. Upon plugging in the power supply (nothing connected to the 'Input' or...

replies: 18 views: 705
Avatar for Graham Sound
Graham Sound 1 week ago
Avatar for Peter99999

Hello, I'm new in this forum, I'm asking an help for a Groove Tubes Vipre I bought used. The problems is that I only hear ...

replies: 21 views: 6,975
Avatar for Matt Syson
Matt Syson 1 week ago
Avatar for Haysoundguy

Anyone happen to have a service manual for a Soundcraft spirit 8 mixer? I have one that needs some help on one channel and one...

replies: 2 views: 191
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Haysoundguy 1 week ago
Avatar for TormyVanCool

Dear all where can I find the schematics for the Focusrite ISA220, please?

replies: 9 views: 237
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TormyVanCool 1 week ago
Avatar for Zeppelin

Hi! Bought a nice Echoplex EP-2 off Ebay. Living in Europe I would need a power converter or I was hoping someone around here...

replies: 3 views: 2,479
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abstinent101 1 week ago
Avatar for themicrophoneguy

Very random question. I'm interested in swapping out a capsule in a LDC for a small diaphragm. But most of them are sold in...

replies: 0 views: 75
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themicrophoneguy 1 week ago
Avatar for Observant Sound

Hello everyone. I bought myself a 4-track tape recorder for learning more about tape loops but sadly there's a problem. This...

Observant Sound
replies: 1 views: 111
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tame1 1 week ago
Avatar for Hamburg58

So I'm installing this system into my studio. I need to run cable and put some outlets for the HRM-16 units into my walls. Just...

replies: 6 views: 2,416
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themaidsroom 1 week ago
Avatar for jac.kosiba

Hi! I recently found my first ever microphone, CAD E-100 2, which obviously got me super excited! Unfortunately it does not...

replies: 3 views: 164
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Thomas W. Bethe 1 week ago
Avatar for archdake

Hello, I'm taking apart a Lexi 1200c. Anyone know the specs of the T1 input transformer? Can't find a service manual/schematic...

replies: 1 views: 98
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archdake 1 week ago
Avatar for neveridentify

As the title suggests, will running a Japanese DX7/9 (configured for 100V, presumably) on 110V cause any issues? I'm looking at...

replies: 13 views: 365
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neveridentify 1 week ago
Avatar for Analogeezer

So I have one of these units, it's a two space rackmount guitar preamp (modeling preamp). I fired it up today and got a...

replies: 4 views: 163
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Analogeezer 1 week ago
Avatar for Chuck Moe

Hello Thought I'd share a really easy fix for an intermittent REL subwoofer popping sound. Over the course of the last year,...

Chuck Moe
replies: 5 views: 1,028
Avatar for pht100
pht100 2 weeks ago
Avatar for lame pseudonym

Hello. I have a relatively cheap large-diaphragm condenser mic that I put a relatively expensive capsule into. It sounds very...

lame pseudonym
replies: 5 views: 192
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lame pseudonym 2 weeks ago
Avatar for kevinharvey

I've got a Leslie 122 that works great with my Hammond CV organ. I've recently acquired a DIY preamp (to plug in 1/4 inch...

replies: 3 views: 162
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The Count 2 weeks ago
Avatar for lame pseudonym

I don't know whether these were executed well, and I know that they seem to be unavailable any more, but I sure would like a...

lame pseudonym
replies: 0 views: 94
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lame pseudonym 2 weeks ago
Avatar for starby

Hi all, I bought a secondhand PC3 and it needs new rotary encoder. Does anybody know model/part number of the encoder? Or...

replies: 7 views: 3,371
Avatar for baseten
baseten 2 weeks ago
Avatar for zongofficial

Hey all, Whenever I twist the output volume knob on my M-audio preamp slightly quickly, it creates a "crackling"...

replies: 1 views: 100
Avatar for Thomas W. Bethe
Thomas W. Bethe 2 weeks ago
Avatar for VoivoD

Hi! I'm looking for a phantom-powered onboard buffer with balanced output. Top (quality) level stuff. I use my guitar only by...

replies: 0 views: 89
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VoivoD 2 weeks ago
Avatar for euio

Lurked for a while but haven't had a reason to post till now, so hello! Hope this is the right forum for this question, if not...

replies: 0 views: 90
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euio 2 weeks ago