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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: 66 views: 82,167
Avatar for Philbo King
Philbo King 6 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: 1,071 views: 449,841
Avatar for gyraf
gyraf 2 weeks ago
Avatar for gabriel1

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

replies: 16 views: 39,333
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: 28,270
Avatar for Aniol1349
Aniol1349 10th June 2017
Avatar for Systolic

I was given a SPX90II. It powers on, the menus work, it sees the input signal, but no sound is output on either channel. Is...

replies: 56 views: 17,790
Avatar for soulguitar
soulguitar 26 minutes ago
Avatar for grizzlycables

Does anyone know where i can find neutrik connectors cheap wholesale. I've been looking everywhere and the prices are always the...

replies: 15 views: 584
Avatar for Richard Crowley
Richard Crowley 26 minutes ago
Avatar for dvdr

I am hoping for some advice here: I got myself a used TL Audio A 4 summing unit. Mint condition, but on closer inspection, it...

replies: 0 views: 42
Avatar for dvdr
dvdr 1 hour ago
Avatar for dreadbizniz

If you require schematics / user manual for the EMT 258 noise filters i am currently racking a pair and have this data document...

replies: 3 views: 1,546
Avatar for tron23
tron23 3 hours ago
Avatar for noah330

Hi, I have done a lot of searching and can't find a product to do what I need. I need a mute switch that simply mutes my...

replies: 6 views: 1,105
Avatar for Richard Crowley
Richard Crowley 8 hours ago
Avatar for Gzmo

Dear all, hope someone could help me. I need a help to find any service manual for Tweed Audio consoles. It looks a really...

replies: 47 views: 16,375
Avatar for RE201
RE201 14 hours ago
Avatar for Alvin Row

Hey i dont know if this is the right section to ask but i am working on my russian TOM 1501 synth and i noticed that some of the...

Alvin Row
replies: 9 views: 338
Avatar for Alvin Row
Alvin Row 15 hours ago
Avatar for tomatoKetchup

Hello all, I'm doing a bit of investigation on this filter and trying to figure out: what was the famous "critical"...

replies: 2 views: 250
Avatar for tomatoKetchup
tomatoKetchup 16 hours ago
Avatar for niva

Hello sluters! I am looking for various Yamaha PM-2000 bits and parts. The most valuable ones are: - Knobs - PSU...

replies: 8 views: 638
Avatar for niva
niva 19 hours ago
Avatar for dsaudio

I'm wondering what is causing the periodic static bursts on output #14 on my Alesis HD24XR recorder. The static only appears on...

replies: 1 views: 251
Avatar for Jim Williams
Jim Williams 19 hours ago
Avatar for forestcreature

What is the "demodulated follower", e.g. pin 10 on a CD4046? I think I understand that it follows the correction...

replies: 0 views: 169
Avatar for forestcreature
forestcreature 20 hours ago
Avatar for Jack Duelisis

Hi I have a weird problem. My OB8 has a tuning issue. Around E4, it drops about 3,2 semitones. The calibrations are ok the...

Jack Duelisis
replies: 21 views: 1,571
Avatar for Sonate
Sonate 20 hours ago
Avatar for iltrich

Hello, I have a DBX 166XL Compressor/Limiter/Gate :facepalm:. Is there anyway to modify it to improve its performance? Is the...

replies: 6 views: 2,598
Avatar for LifeWhyz
LifeWhyz 1 day ago
Avatar for Hollowman9

I have begun making modifications to an old Univox Maxi-Korg synthesizer. When I bought the unit it was partially functioning...

replies: 32 views: 1,198
Avatar for Hollowman9
Hollowman9 1 day ago
Avatar for The Untuned

My Korg DRV 3000 (vintage reverb/delay) says in the display: internal memory low. So I have to change the internal battery. I...

The Untuned
replies: 1 views: 268
Avatar for Northamusi
Northamusi 1 day ago
Avatar for BHW

I have problems with my Zoom 9010, if i switch to routing 3 and use on e1 and e2 and phaser. I have problems on the e1 channel....

replies: 0 views: 194
Avatar for BHW
BHW 1 day ago
Avatar for MrTeach

Im an old musician/composer who decided to make something again after over 25 years of pause. Have some old relic instruments...

replies: 3 views: 327
Avatar for zamproject
zamproject 1 day ago
Avatar for Spano

Hey everybody how are you? ^^) I want to try building a guitar cabinet it seems like it could be an easy way to really branch...

replies: 8 views: 663
Avatar for lame pseudonym
lame pseudonym 1 day ago
Avatar for jetproplabs

I have a lomo 19a9 that I bought about ten years ago. The power supply is a pretty straight forward box like a neumann, AKG,...

replies: 12 views: 2,348
Avatar for rozovoku4e
rozovoku4e 2 days ago
Avatar for Whoopysnorp

I've been eyeing the Microphone Parts SDC kit lately. I have a couple of MXL603s that never get used, and either I'll mod them or...

replies: 15 views: 1,686
Avatar for joesilver
joesilver 2 days ago
Avatar for rachtaia

Hi I was looking for a service manual and someone suggest me to ask here. I repair some old stuff as tube amps, pedals,...

replies: 1 views: 333
Avatar for Synth Guru
Synth Guru 2 days ago
Avatar for SP2016

I own a brand new Eventide Orville (old stock) and intended to use it again. When it boots it says it is a DSP7000 (!!), and get...

replies: 7 views: 402
Avatar for electricsound
electricsound 3 days ago
Avatar for Pinebox Studio Services

I have a PSU for a Gefell UN-920 that has a patter selector switch which has mechanically failed. I contacted Gefell and they...

Pinebox Studio Services
replies: 1 views: 300
Avatar for Pinebox Studio Services
Pinebox Studio Services 3 days ago
Avatar for wolf1419

Hello, I'm a DIY guy that gets things fixed if I have some guidance. A used Yamaha AW1600 Digital Multitrack that I own , has a...

replies: 7 views: 474
Avatar for wolf1419
wolf1419 3 days ago
Avatar for tasoshobby

Greetings people! Im posting about a pair of ESI Near05 classic, which need a new tweeter speaker as i have done the one! I...

replies: 1 views: 331
Avatar for tasoshobby
tasoshobby 3 days ago
Avatar for Blissy

My SPX 90 is really noisy. i believe it is the power supply. It gets very hot, I think its on it's way out. was thinking of...

replies: 9 views: 1,076
Avatar for soulguitar
soulguitar 3 days ago
Avatar for crzmky

So the tiny fuse in the Phantom power circuit has blown at some point on the 8304 here at the studio I work at. Was wondering if...

replies: 2 views: 258
Avatar for crzmky
crzmky 4 days ago
Avatar for ArKay99

I bought an AVID Artist Mix a few months back and it's been working great. Today during a session without touching it I hear a...

replies: 17 views: 4,965
Avatar for Legali
Legali 4 days ago
Avatar for mr. harrison

hi there, me and my tech are about to give up on this tuning problem my P5 has. only voices 4 and 5 of osc b are not tuning...

mr. harrison
replies: 0 views: 258
Avatar for mr. harrison
mr. harrison 5 days ago
Avatar for Martel80

Hello, I'm looking for the Schematic for the Series 800. If anyne got them, I would really appreciate if they could...

replies: 3 views: 645
Avatar for Martel80
Martel80 5 days ago
Avatar for steefaan

Hi People, i have a little Problem with my Ensoniq ESQ-1. The Filter Cutoff don't open right. The sounds missing...

replies: 3 views: 541
Avatar for Man-Machine
Man-Machine 5 days ago
Avatar for Princeton.Verb

Lately I've noticed that I have to use quite a lot of gain on my mic pres to get a good level out of my Phanthera V. I decided...

replies: 10 views: 1,066
Avatar for Princeton.Verb
Princeton.Verb 5 days ago
Avatar for noah330

Hi, I am currently working on building myself an 8 channel summing mixer from the NY Dave schematic that has been floating...

replies: 15 views: 604
Avatar for forestcreature
forestcreature 5 days ago
Avatar for Riinehart

Hi all, I'm trying to bring a Crumar Performer back to life. It looks like a previous owner made some sort of modification to...

replies: 2 views: 716
Avatar for analog greg
analog greg 5 days ago
Avatar for DanFor

Does somebody has a copy of any firmware version for Yamaha KX88/76 master keyboard? I just bought KX76 with some issues and...

replies: 3 views: 540
Avatar for DanFor
DanFor 6 days ago
Avatar for RichRadio

hey guys This is my first post here so apologies if I'm not in the right place! I have been playing around with a...

replies: 0 views: 247
Avatar for RichRadio
RichRadio 6 days 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: 379 views: 245,424
Avatar for onlyme
onlyme 6 days ago
Avatar for Rockman Rock

Hello, I think I might need a new drive for my e4xt every time I try to save anything it won't work and every time I try to flash...

Rockman Rock
replies: 1 views: 310
Avatar for dfchandler
dfchandler 6 days ago
Avatar for tubeing

Hi all, I was using my Apogee to calibrate another piece of gear and I realized that the balanced line outs are...not very well...

replies: 7 views: 329
Avatar for tubeing
tubeing 6 days ago
Avatar for BradM

I just scored an Otari MX55 in good condition with MRL tape, 8 reels of unopened tape and a HandiMag for $200 this morning. I'm...

replies: 17 views: 5,646
Avatar for feadan
feadan 6 days ago
Avatar for Sadomiso

Hi, Any recommendations for old gear repair/servicing (Urei 1176, Dynachord delay, Api EQs....)? Not John Klett whom I already...

replies: 4 views: 423
Avatar for RKelly
RKelly 6 days ago
Avatar for sameal

I've seen this done before, but im curious if theres an exact science, has to be, about placement of the preview head on an...

replies: 30 views: 927
Avatar for Ingenia
Ingenia 6 days ago
Avatar for belzrebuth

I got a nova modded SH-101 having the following issue: The LFO is always routed to the filter except if I plug a jack cable on...

replies: 1 views: 333
Avatar for belzrebuth
belzrebuth 1 week ago
Avatar for hemi666

Hi all, I have an Akai VX-90 which has been acting a bit funny, not tuning, voices not behaving as expected. I have a couple of...

replies: 3 views: 501
Avatar for hemi666
hemi666 1 week ago
Avatar for ejt

Howdy all. I use a Digitech s100 for effects on my bass rig, with a Digitech FS-300 midi pedal to control it. The FS-300 has...

replies: 1 views: 345
Avatar for ejt
ejt 1 week ago
Avatar for Gimlay

Hey Sluts Im recapping a soundcraft delta for a summing mixer and i had a few questions. Im assuming on using Panasonic FM 220...

replies: 8 views: 2,749
Avatar for hellofishy
hellofishy 1 week ago
Avatar for Praxisaxis

Hey All, My (usually) 100% reliable Moog Voyager has been intermittently shutting down after powering up. It's not a clean...

replies: 16 views: 758
Avatar for WorldPowerLabs
WorldPowerLabs 1 week ago
Avatar for PatPend

Anyone know where to get Petrick panel buttons used in late-model OB-8's? These have the "diagonal" contact...

replies: 3 views: 499
Avatar for PatPend
PatPend 1 week ago
Avatar for David Kulka

A friend tells me that people are starting to use standard CAT-5 data cable for balanced analog and digital audio wiring, with...

David Kulka
replies: 85 views: 20,501
Avatar for ponzi
ponzi 1 week ago
Avatar for danmaxson

Hi, I’m new to recording analog so my terminology might be a little off. The issue I am having is that when I record a second...

replies: 4 views: 317
Avatar for danmaxson
danmaxson 1 week ago


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