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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: 71 views: 92,005
Avatar for Timo Pascal
Timo Pascal 1 week 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: 1,094 views: 483,271
Avatar for ulysses
ulysses 14th June 2019
Avatar for gabriel1

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

replies: 16 views: 44,108
Avatar for ponzi
ponzi 27th October 2017
Avatar for Tim Farrant

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

Tim Farrant
replies: 8 views: 32,913
Avatar for Aniol1349
Aniol1349 10th June 2017
Avatar for locust_tree

Greetings slutz, I just got my recording gear out of storage after a move and figured I'd give my Mackie 32-8 a light servicing,...

replies: 4 views: 619
Avatar for Brent Hahn
Brent Hahn 2 minutes ago
Avatar for cononojoda

Hello, I recently let a technician "repair" my Harrison Console. He cleaned everything, swapped a few ICs... But the...

replies: 9 views: 802
Avatar for David Kulka
David Kulka 3 hours ago
Avatar for Seccione

I have lost hope for finding a reasonably priced MV8-OP1 output expansion board for Roland's MV-8800. :( So I've been toying...

replies: 30 views: 6,362
Avatar for millionmiles
millionmiles 4 hours ago
Avatar for producerxtr

Hello there, We are looking for a company or an individual who can help us design and manufacture custom headphone drivers....

replies: 4 views: 790
Avatar for producerxtr
producerxtr 4 hours ago
Avatar for CRK

For some reason when slaving the Roland CR 8000 to an external DIN Sync clock, I get a hum out of the output jack. When clocking...

replies: 4 views: 878
Avatar for CRK
CRK 5 hours ago
Avatar for mlhmatt

I just recently bought a second-hand Vox AC4TV and after plugging it in I realized it didn't sound like the other demo's I'd...

replies: 1 views: 245
Avatar for tINY
tINY 7 hours ago
Avatar for recordinghopkins

Tonight the 17v +/- lights went out on my power supply. I have yet to remove it from the rack, but I was curious to see if anyone...

replies: 107 views: 21,950
Avatar for Aa63
Aa63 7 hours ago
Avatar for Steamy Williams

I've had a bantam patchbay custom made for me by the manufacturer that made my line level mixer. I specified most of the patchbay...

Steamy Williams
replies: 15 views: 4,419
Avatar for Jim Williams
Jim Williams 8 hours ago
Avatar for Riinehart

Hey everyone, I have a Korg Arp Odyssey (no longer under warranty) that has stopped working out of the blue. The power light...

replies: 9 views: 688
Avatar for Riinehart
Riinehart 8 hours ago
Avatar for Recycled_Brains

I have a Telecaster that I use with a vintage Ampeg Reverberocket, and the single-coil pickups generate a whole lotta buzz...

replies: 10 views: 4,932
Avatar for Paliyyy
Paliyyy 10 hours ago
Avatar for Djeldad36

Hi fuse in my sub died. You have to know which fuse is inside

replies: 1 views: 460
Avatar for S_mask
S_mask 16 hours ago
Avatar for jimbo.laboon

Hey yall, I've got an old Lowrey organ with a leslie (model no. 984-009211) and after hearing the incredible guitar tone in...

replies: 1 views: 343
Avatar for tINY
tINY 16 hours ago
Avatar for joecandy

Anybody have the schematic for the Mojave MA 201 fet? Thanks for any and all info! JC

replies: 0 views: 602
Avatar for joecandy
joecandy 22 hours ago
Avatar for nucelar

Hi all, Since TL Audio are out of business I don't know who to ask. I would need a service manual /schematic for a TL Audio...

replies: 6 views: 5,875
Avatar for diatad
diatad 1 day ago
Avatar for Farmboy presents

I just built and troubleshot a Gssl compressor kit. It works perfectly!!! It took a while to track down all the faults, nearly...

Farmboy presents
replies: 2 views: 640
Avatar for chipss36
chipss36 1 day ago
Avatar for copperline

Does anyone have an Eventide Clockworks 1745 or 1745A manual or schematic? I have searched everywhere with no luck. Thanks...

replies: 0 views: 701
Avatar for copperline
copperline 1 day ago
Avatar for owai

Hello, I'm trying to fix a Roland HP 2900g, but i can't find a schematic or a service manual. A small transistor...

replies: 7 views: 1,589
Avatar for bremusound
bremusound 1 day ago
Avatar for merseymale

Hi! I used to own the line 6 DM4 distortion moddler, Years ago and I eventually modded it (I never had an expression pedal) to...

replies: 13 views: 1,298
Avatar for S_mask
S_mask 1 day ago
Avatar for mrand

Looking for some guidance fixing my pcm60. --Problems: Only getting reverb on single channel. Other is silent. Undue...

replies: 0 views: 803
Avatar for mrand
mrand 2 days ago
Avatar for 386

I recently purchased a preowned Black Lion Audio Auteur Micro preamp (the original one not MKII). The previous owner has done a...

replies: 5 views: 735
Avatar for audiospecific
audiospecific 2 days ago
Avatar for beatsnblunts

im looking for service help on a ua2192? Schematics or parts? Or LA based tech familiar with? UA just told me that they dont...

replies: 4 views: 650
Avatar for audiospecific
audiospecific 2 days ago
Avatar for iaw1978

When replacing a slide pot how do you measure the length? sounds silly, but is it the length of the entire pot including the...

replies: 1 views: 502
Avatar for gyraf
gyraf 2 days ago
Avatar for matthollenberg

Repairing vintage amplifiers has always been a hobby and an interest of mine, and it's something I'd like to make a career out...

replies: 9 views: 3,642
Avatar for ChefRex
ChefRex 2 days ago
Avatar for StormLord11

My bass players amp head went dead recently and I'm trying to figure out what the problem is. When turned on and plugged into a...

replies: 3 views: 777
Avatar for Radardoug
Radardoug 3 days 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: 92 views: 12,118
Avatar for denork
denork 3 days ago
Avatar for pelaurendeau

Hi everybody, I bought a Philicorda 22GM751. The guy who sold it to me, told me straight away than the reverb wasn't working,...

replies: 3 views: 771
Avatar for EL504
EL504 3 days ago
Avatar for seaborg

This is a guide for replacing the screen in the Akai S900/950. The lcd screen was $8 it is a blue background with white script,...

replies: 3 views: 1,404
Avatar for MoodyStudios
MoodyStudios 3 days ago
Avatar for Its Mork

Hi, I got myself a TT Patchbay, cables are soldered on already (thank god), but without plugs. I will need to solder strictly...

Its Mork
replies: 12 views: 847
Avatar for Its Mork
Its Mork 4 days ago
Avatar for DonnyLuvd2Bowl

Ok-- was trying to track down some hum, seems to only be present when the control out to the monitors is plugged in, thinking...

replies: 0 views: 810
Avatar for DonnyLuvd2Bowl
DonnyLuvd2Bowl 4 days ago
Avatar for suchenderxxx

Cheers, i have got an Marantz Pmd 740 Six channel Mixer and 4 Track Recorder. Works and sounds good. Only Problem is that the...

replies: 7 views: 3,365
Avatar for S_mask
S_mask 4 days ago
Avatar for frankthefunky1

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

replies: 18 views: 3,060
Avatar for Orson Maxwell
Orson Maxwell 5 days ago
Avatar for soundrick

I have seen some of you guys are members of GroupDIY as well.... I have tried to register on this site with ZERO success. Is...

replies: 41 views: 5,356
Avatar for JohnRoberts
JohnRoberts 5 days ago
Avatar for Transmutant

Mixer mod


Hi I have a Soundtracs 32/4/2 mixer, not used at the moment but still a good unit. Just feel it's a bit lifeless... I'm going to...

replies: 61 views: 1,778
Avatar for Transmutant
Transmutant 5 days ago
Avatar for taarak

Hello, I don't know how to formulate an objective question for this, and it may be already answered, so please say to me if...

replies: 33 views: 1,264
Avatar for Paul Gold
Paul Gold 6 days ago
Avatar for deethefur888

Hi! I just bought Korg Microkorg s in Japan. It use 9v power adapter which originally meant to be used for Japanese socket which...

replies: 4 views: 674
Avatar for deethefur888
deethefur888 6 days ago
Avatar for Setze

Hi Are there any empty chassis TAB V72 size out there for sale? I'd like to clone my own design and use it in a suitable...

replies: 0 views: 725
Avatar for Setze
Setze 6 days ago
Avatar for Jarjar

Hi all, I just bought a 160X that needs a new compression ratio pot. Anyone know a source for these or an equivalent part...

replies: 5 views: 880
Avatar for Jarjar
Jarjar 6 days 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: 14 views: 1,363
Avatar for Jarjar
Jarjar 6 days ago
Avatar for Santiago

Hi, I have had for a while a Ross distortion pedal (the early tan version made in the US) that I like a lot, as it can go from...

replies: 1 views: 661
Avatar for Jim Williams
Jim Williams 6 days ago
Avatar for Timo Pascal

Hi, I'm looking for the Service Manual for the FOSTEX 450 Mixer. I can find it as a download for 45,- $ but I don't have the...

Timo Pascal
replies: 1 views: 583
Avatar for Radardoug
Radardoug 6 days ago
Avatar for victorianaylor

LR16 PROBLEMS hì folks I have owned the LR16 for several years without any major issues until now. When powering up, the...

replies: 0 views: 645
Avatar for victorianaylor
victorianaylor 6 days ago
Avatar for Dronomite

Hi. I have a problem with the gain control on my Axxe. When I bring the Gain slider up, a tone is also rising, like a hold tone....

replies: 1 views: 833
Avatar for Dronomite
Dronomite 1 week ago
Avatar for Amsoily

Ok, I'm going to Steal & Do it Myself Optical Compressor. Enclosure 2x Aphex 1404 2x Parmer Reamp...

replies: 0 views: 623
Avatar for Amsoily
Amsoily 1 week ago
Avatar for tourtelot

If anyone has one, knows a source, or knows of a DL, I'd appreciate it. I need to find the meter trimmers. PM me please...

replies: 1 views: 799
Avatar for dfchandler
dfchandler 1 week ago
Avatar for 1337_De_Hard

Greetings Gear Slutz! This is my first post on these forums! I have been interested in key detection for some time, but...

replies: 1 views: 539
Avatar for Amsoily
Amsoily 1 week ago
Avatar for RE201

A while back I came across a pair of mystery stuffed pcbs which seem to be some kind of (maybe) Pultec-like passive eq. What...

replies: 4 views: 671
Avatar for DrewE
DrewE 1 week ago
Avatar for samwolfson

Hey all, I'm beginning research into the process of repairing and refurbishing a tube amplifier I bought at a local guitar...

replies: 3 views: 579
Avatar for tchgtr
tchgtr 1 week ago
Avatar for atharanic

Hi! Need help. One of my M1 Active 520 SCREAMS super loud and has the red ring when I turn it on. Fiddling with the volume...

replies: 3 views: 624
Avatar for Bushman
Bushman 1 week ago
Avatar for snod_donkey

Looking for some help on a few bits i have picked up.. Pulling my hair out trying to find anything on this gear.. I have just...

replies: 4 views: 2,205
Avatar for snod_donkey
snod_donkey 1 week ago
Avatar for iaw1978

Anyone have an English version of the link...

replies: 0 views: 647
Avatar for iaw1978
iaw1978 1 week ago


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