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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: 91,905
Avatar for Timo Pascal
Timo Pascal 4 days 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: 483,011
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: 44,060
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: 32,867
Avatar for Aniol1349
Aniol1349 10th June 2017
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: 12 views: 1,200
Avatar for merseymale
merseymale 1 hour ago
Avatar for cononojoda

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

replies: 5 views: 544
Avatar for cononojoda
cononojoda 4 hours 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: 616
Avatar for Radardoug
Radardoug 6 hours 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: 12,020
Avatar for denork
denork 7 hours 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: 694
Avatar for EL504
EL504 15 hours 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: 5 views: 1,494
Avatar for Mr. HorseMagic
Mr. HorseMagic 16 hours 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: 3 views: 558
Avatar for Radardoug
Radardoug 21 hours 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: 1,358
Avatar for MoodyStudios
MoodyStudios 1 day 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: 4 views: 637
Avatar for Radardoug
Radardoug 1 day 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: 793
Avatar for Its Mork
Its Mork 1 day 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: 685
Avatar for DonnyLuvd2Bowl
DonnyLuvd2Bowl 1 day 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: 3,314
Avatar for S_mask
S_mask 1 day 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: 3,019
Avatar for Orson Maxwell
Orson Maxwell 2 days 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: 2 views: 693
Avatar for producerxtr
producerxtr 2 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: 5,291
Avatar for JohnRoberts
JohnRoberts 2 days 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: 1 views: 527
Avatar for gyraf
gyraf 2 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: 1,719
Avatar for Transmutant
Transmutant 2 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: 1,181
Avatar for Paul Gold
Paul Gold 3 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: 607
Avatar for deethefur888
deethefur888 3 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: 655
Avatar for Setze
Setze 3 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: 807
Avatar for Jarjar
Jarjar 3 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: 1,324
Avatar for Jarjar
Jarjar 3 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: 589
Avatar for Jim Williams
Jim Williams 3 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: 514
Avatar for Radardoug
Radardoug 3 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: 576
Avatar for victorianaylor
victorianaylor 4 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: 761
Avatar for Dronomite
Dronomite 4 days 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: 552
Avatar for Amsoily
Amsoily 4 days 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: 730
Avatar for dfchandler
dfchandler 4 days 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: 458
Avatar for Amsoily
Amsoily 5 days 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: 599
Avatar for DrewE
DrewE 5 days 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: 506
Avatar for tchgtr
tchgtr 5 days 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: 557
Avatar for Bushman
Bushman 5 days 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: 2,166
Avatar for snod_donkey
snod_donkey 6 days ago
Avatar for iaw1978

Anyone have an English version of the link...

replies: 0 views: 575
Avatar for iaw1978
iaw1978 6 days ago
Avatar for waveterm

Hi, does anyone know what model and make the dual concentric pot for input/output level is used in the Aphex 9651 Expressor...

replies: 5 views: 1,710
Avatar for musicfirst234
musicfirst234 1 week ago
Avatar for StormLord11

So I think the title is pretty self explanatory.. anytime I hit a key, any key, on my D50, it plays at full velocity. I tried...

replies: 0 views: 736
Avatar for StormLord11
StormLord11 1 week ago
Avatar for Mablonowski Jarc

I´ve found an old Dynacord ADS at my workplace and I wondered what this thing would sound like. So I tried to power on - and...

Mablonowski Jarc
replies: 6 views: 2,039
Avatar for Dronomite
Dronomite 1 week ago
Avatar for TMI

I have located a small number of NOS a/d converters for the Lexicon PCM 80 PCM 90 series of digital reverbs that I am using for...

replies: 81 views: 22,440
Avatar for Lorenzop
Lorenzop 1 week ago
Avatar for thechrisl

I have a bunch of decade + old Tripp-Lite Isobar surge protectors in my gear collection. As far as overall quality goes, they...

replies: 4 views: 667
Avatar for thechrisl
thechrisl 1 week ago
Avatar for synthophile

Hi, I desperately need some basic information from a guy who have access inside of Kirovsky RITM 2 synth or at least know it...

replies: 1 views: 635
Avatar for synthophile
synthophile 1 week ago
Avatar for synthophile

Hey there! (Jump to Current situation for escaping boring parts) Recently I bought a soviet famous Kirovsky's РИТМ-02...

replies: 3 views: 771
Avatar for synthophile
synthophile 1 week ago
Avatar for electronicmusic

Does anyone know what would cause this behavior? There is no audio in the signal path.

replies: 2 views: 806
Avatar for electronicmusic
electronicmusic 1 week ago
Avatar for synthophile

DO NOT PANIC! The whole topic is about just 1 pin. Hi everyone. I've got a Roland SPD-S 9 sampling drum pad which the owner has...

replies: 1 views: 816
Avatar for synthophile
synthophile 1 week ago
Avatar for Mr Q

Hi folks, I imagine i have a multiway cable with DB25 Tascam pinout at both ends. This cable will work for both analog as...

Mr Q
replies: 1 views: 698
Avatar for Mr Q
Mr Q 1 week ago
Avatar for mexicola

Just saw this while ordering parts on mouser today LME49710NA/NOPB Texas Instruments | Mouser Same for the 49720. Sigh :(

replies: 57 views: 11,824
Avatar for Brian M. Boykin
Brian M. Boykin 1 week ago
Avatar for jennabowen

I have large number of OST files that I want to convert into Outlook PST file. Is there any solution available to convert...

replies: 2 views: 822
Avatar for dayanajoy
dayanajoy 1 week ago
Avatar for theBF

I spent the weekend trying to understand and improve the LA-610. I think I found a first step. Appreciate hearing from others...

replies: 23 views: 8,233
Avatar for chrisdee
chrisdee 1 week ago
Avatar for kroegermusic

Hey Everyone, I'm wondering if someone could tell me where I can source the Old School Output gain knobs that Brent Used on...

replies: 2 views: 995
Avatar for kroegermusic
kroegermusic 1 week ago
Avatar for aaeronn

Soooooo, Both amps in my ASP8s developed the same failure within a few months of each other - the woofer pulses/thumps even...

replies: 40 views: 9,179
Avatar for MikeInOttawa
MikeInOttawa 1 week 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: 3 views: 822
Avatar for CRK
CRK 1 week ago


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