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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: 84 views: 117,308
Avatar for gyraf
gyraf 18 hours ago
Avatar for Tim Farrant



OK, something to spice up Geekslutz = here is where we post images of the INSIDE of audio equipment. Disclaimer; any photo...

Tim Farrant
replies: 1,151 views: 546,565
Avatar for pan60
pan60 2 weeks ago
Avatar for gabriel1

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

replies: 19 views: 54,886
Avatar for msbettyhunt
msbettyhunt 27th March 2020
Avatar for Tim Farrant

Anyone who offers technical services should get themselves listed into the new member directory here... Gearslutz Directory:...

Tim Farrant
replies: 9 views: 43,958
Avatar for msbettyhunt
msbettyhunt 24th March 2020
Avatar for AvS

I was thinking about trying some other tubes for my Summit pre but i dont know anything about changing tubes so bare with me. Is...

replies: 21 views: 5,607
Avatar for rbbrchckn
rbbrchckn 2 hours ago
Avatar for Pasterofmuppets

Whelp, I’ve owned this ADAT LX20 since new for $1400, and it won’t power up. I found some free time today to open it up, and...

replies: 2 views: 372
MISTERQCUE 2 hours ago
Avatar for symby

I'm trying to find a studio vocal mic that has the highest quality possible. Anybody know of any kind?

replies: 5 views: 281
Avatar for lame pseudonym
lame pseudonym 2 hours ago
Avatar for fredrikberg

Hi! I have a AMR 1600 console that have this problem. If I go out to off mixbus on Send L/R everything is fine. If I'm...

replies: 6 views: 220
Avatar for JohnRoberts
JohnRoberts 7 hours ago
Avatar for ifudontlikebees

Hey guys! Does anyone here know how to build a farfisa FA/R power supply? I just got a farfisa compact duo that I can’t test...

replies: 4 views: 105
Avatar for Rick Dalton
Rick Dalton 7 hours ago
Avatar for jml designs

I'm attaching a clip of my new 1963 u67 making an odd "fluttering" sound that seems to come and go (listen with...

jml designs
replies: 11 views: 174
Avatar for Radardoug
Radardoug 7 hours ago
Avatar for Mr Funk

Hello A friend of mine is designing and building a vari-mu compressor (commercial) and was asking me about features etc. It is...

Mr Funk
replies: 0 views: 70
Avatar for Mr Funk
Mr Funk 10 hours ago
Avatar for jml designs

Should this be in spec techs or here? I figuered it's a nerd question so belongs in the geek forum. Either way, I have a 1964 U67...

jml designs
replies: 1 views: 90
Avatar for jml designs
jml designs 11 hours ago
Avatar for arch1

Turned on my ghost 32 power supply and it died on me. CPS 275. No power to the board, fan stopped also. The center and right...

replies: 28 views: 2,504
Avatar for innerbooty
innerbooty 11 hours ago
Avatar for iangomes

Hello fellow geekslutz, I’ve been a big fan of these Orban 111b spring reverbs first quite a while. At one time, I shot my...

replies: 3 views: 234
Avatar for iangomes
iangomes 11 hours ago
Avatar for Rizz0

Hi there, Wondering if someone can help me out. Up front would like to ask that you forgive my ignorance if the answer seems...

replies: 8 views: 1,373
Avatar for Cabirio
Cabirio 12 hours ago
Avatar for sbass

Hi, I'm new here and I have a request. I recently bought a Soundcraft 16/08 series II (early 70's). It's a beautiful one but it...

replies: 55 views: 7,430
Avatar for Jim Williams
Jim Williams 13 hours ago
Avatar for lore

Hello , does somedy know if a soundcraft DCP100 PSU taken from a spirit live is compatible with a Delta DLX 16/4/2 , the...

replies: 2 views: 176
Avatar for lore
lore 18 hours ago
Avatar for gouge

I'm about to undertake some mods to my VLA and thought it would be fun for anyone else keen to do the same to join in the...

replies: 28 views: 7,889
Avatar for traw
traw 1 day ago
Avatar for pajczur

Hello, at first I need to say that of course I've already read planty articles about feedback compression. And I know all those...

replies: 12 views: 369
Avatar for ruffrecords
ruffrecords 1 day ago
Avatar for daversonbass

Hi all, There are some other topics about this on other forums, but all links seem to be dead at this point. I was wondering,...

replies: 2 views: 123
Avatar for daversonbass
daversonbass 1 day ago
Avatar for faridbostan

Hello everyone How can i open this thing? grrr there isn't any screws

replies: 4 views: 147
Avatar for faridbostan
faridbostan 1 day ago
Avatar for kinganalog

Hey everyone ,Im looking for a pdf or photocopy of a 1975 MCI jh-16 (non quior) tape machine . If anyone has any ideas who might...

replies: 24 views: 2,189
Avatar for HeadlessDinosaur
HeadlessDinosaur 2 days ago
Avatar for mogazi!

Hello, I'm just in the process of recapping a whole bunch of Allison Research Kepex 500 gates (the black 70s ones) and...

replies: 2 views: 202
Avatar for mogazi!
mogazi! 2 days ago
Avatar for Martin Elsey

Hi There I have a KRK VXT8 monitor with a couple of short-circuit burnt up diodes in the D3 and D4 circuit positions. Can...

Martin Elsey
replies: 0 views: 107
Avatar for Martin Elsey
Martin Elsey 2 days ago
Avatar for D40Oz

Surprisingly the Samson c01 and c01u pro are the best microphones for my voice out of a hundred mics I’ve tried But the hiss...

replies: 2 views: 126
Avatar for D40Oz
D40Oz 2 days ago
Avatar for Yoski

Hello Guys! It‘s the second time I bring up my Otari MX7000. It‘s fully restored now. I swaped all caps and bearings,...

replies: 8 views: 1,128
Avatar for Yoski
Yoski 2 days ago
Avatar for frenkonio

Hi guys, I need your help for a strange issue related to a Lexicon Larc. I got a M300L, I bought it used and thought, as the...

replies: 11 views: 927
Avatar for chicko
chicko 2 days ago
Avatar for konstantingroove

Hi everyone, i have a strange dilemma with the ATR tapes/flanges. I got a few of those and keep getting tape rub against the...

replies: 19 views: 519
Avatar for beats workin'
beats workin' 3 days ago
Avatar for sameal

Hello! I probably have failing components, but just to be sure, is there anything in this circuit on the 4 mic inputs only...

replies: 6 views: 454
Avatar for sameal
sameal 3 days ago
Avatar for Sailor Hope

Hi, today the front capsule(?), or, the gridded 3-4mm steel cap on the front of the mic, just fell off - and all the high end...

Sailor Hope
replies: 48 views: 7,402
Avatar for DavidChampoux
DavidChampoux 3 days ago
Avatar for dreske

Howdy. I want to start using higher sample rates (176 or 192), but have found that with both if the two different converters...

replies: 52 views: 6,237
Avatar for tekn0
tekn0 3 days ago
Avatar for Hayman

Hi GS I just bought this small Yamaha PM430 and are about to start working on it. It has been years since I last did something...

replies: 100 views: 1,677
Avatar for Cabirio
Cabirio 3 days ago
Avatar for Deadletteroffice

Hey all, wasn't sure where to post this so I'm trying here. I'm curious to buy a Hairball Rev D, but not confident to build it...

replies: 1 views: 355
Avatar for Catabolic
Catabolic 3 days ago
Avatar for ArntzenArtizterier

Hi, my Echolette Klemt M40 amp has suddenly started to get a pretty loud humming in the low frequencies, even when the gain and...

replies: 0 views: 148
Avatar for ArntzenArtizterier
ArntzenArtizterier 3 days ago
Avatar for sat159p1

Can you recommend me the best tube to use with spl mk2-t vitalizer? Unit has stock Sovtek 12AX7LPS tubes (one operating in stereo...

replies: 17 views: 4,551
Avatar for Sound Arch
Sound Arch 3 days ago
Avatar for Peewee76384

I have 40ch Series TWO, I have a brand new Blue Dog power supply. I rewired the studio ins and outs, got my motor humming, then...

replies: 1 views: 144
Avatar for Jim Williams
Jim Williams 4 days ago
Avatar for jasonnevis

Hi all, I've got an Oberheim Matrix 6 and currently it's power supply is set to 110v. After opening it up, I can see a sticker...

replies: 4 views: 695
Avatar for Mastropiero
Mastropiero 5 days ago
Avatar for whinylittlerunt

Need some help verifying an issue and identifying parts: Have an Avalon 737sp on the bench, appears to have a bad transformer...

replies: 8 views: 1,480
Avatar for Rick Dalton
Rick Dalton 5 days ago
Avatar for gearstudent

Hello, Faders on a normal mixer take many sound inputs, and mix them down to a single stereo output. I was wondering if the...

replies: 4 views: 273
Avatar for gearstudent
gearstudent 5 days ago
Avatar for pidr

I recently bought Poly61m and it works fine, in general. It required some basic maintenance so I replaced the original battery,...

replies: 0 views: 160
Avatar for pidr
pidr 6 days ago
Avatar for opacheco

Hi to everyone! Do someone have the CROWN XLi 3500 schematic? I have searched in the web but found nothing about! I...

replies: 2 views: 143
Avatar for opacheco
opacheco 6 days ago
Avatar for ChayaFFM

Is there something like the Radial JDI Stereo but without the padding down into mic level? Meaning just pure transformer...

replies: 22 views: 585
Avatar for Speedskater
Speedskater 6 days ago
Avatar for camargyle

I inherited a few patch bays, now I’m on the hunt for a discontinued PUNCHING TOOL! I believe it’s a QB-2 or QB-4 or QPC-115....

replies: 3 views: 185
Avatar for Thomas W. Bethe
Thomas W. Bethe 6 days ago
Avatar for isoparmesan

I have an Alesis MultiMix 12R (not the greatest mixer, I know). It works fine for the most part, does what I need it to do. But,...

replies: 2 views: 182
Avatar for isoparmesan
isoparmesan 6 days ago
Avatar for valis

I have 2 DSP cards (PCI based) that I'd love to service--even though they are still in operation. I have already had 1 fail...

replies: 3 views: 248
Avatar for valis
valis 6 days ago
Avatar for Sypowicz

Hello im in the process of fixing up my atb a bit. If anyone dabbled in changing pots and faders help me out pls. What pot to...

replies: 4 views: 393
Avatar for Sypowicz
Sypowicz 6 days ago
Avatar for UsedEQuipment

Well, the title says it: i can hear some local radio station playing in my headphones plugged into Mackie Onyx. I am not hearing...

replies: 3 views: 343
Avatar for deondamage
deondamage 6 days ago
Avatar for sonotor

hello I have a sony mxp 29 mixer and I would like to add a direct out on each channel! Could you help me to pick the signal...

replies: 29 views: 7,248
Avatar for shakemake
shakemake 1 week ago
Avatar for opacheco

Hi to everyone! I am having problems with a CROWN IT-6000 amplifier, this amp turn on but in few seconds after of the rutinary...

replies: 9 views: 328
Avatar for Rick Dalton
Rick Dalton 1 week ago
Avatar for frankthefunky1

Good day everybody. I own an Akai MPK88 midi controller. Three keys have problems hitting full velocity. These particularly...

replies: 21 views: 4,461
Avatar for Checky
Checky 1 week ago
Avatar for 3stamme

I will probably get crucified for posting this thread, but I have googled everywhere to find an answer for this, and cannot find...

replies: 1 views: 154
Avatar for CFB4
CFB4 1 week ago
Avatar for Jidis

This thing shows up in the service manual for a dbx type II noise reduction unit. It's used to produce a simultaneous stepped...

replies: 12 views: 462
Avatar for Jidis
Jidis 1 week ago
Avatar for plutoniq

I’m restoring an Eventide HD949 I bought a few years back not working correctly. Because I can’t “just repair something”,...

replies: 0 views: 156
Avatar for plutoniq
plutoniq 1 week ago
Avatar for thermal

I am trying to replace the cable/minijack assembly on my Beyerdynamic DT990's and have obviously resoldered the thing...

replies: 6 views: 1,829
Avatar for mustygoose
mustygoose 1 week ago


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