Huge Lot of 9 Rack-Mount Pro Audio Processors for Parts/Repair

Please understand that nothing in this lot is functioning properly right now , this listing is exclusively directed toward someone who's savvy with repairs and knows their way around a circuit and a solder gun. They've all been stored in a temperature controlled environment next to my bench for a couple years now, so you don't have to worry about any excessive marks of age/wear/storage.

There is a bundle of third-party power adapters included as well (for the few units that don't have cables attached). I'm also including a plastic organizer that I've used to store most of the pieces/parts from these units.

Things could be missing, and I could be overlooking something or another, but I believe that all of these units are serviceable in the right hands. This is a large undertaking for someone without experience and knowledge -- be advised that this is directed toward professionals and seasoned hobbyists. Please feel free to reach out with any questions/concerns. I won't get into the features and functionality of these units since they're not functioning at this point in time, but there's a couple rarities in this lot that should warrant some conceded effort for repair. There are obvious signs of wear, age, and storage - but generally speaking, they're in decent shape cosmetically. Please be advised that most of these are disassembled and most of the PCB's are disconnected, do not attempt to power these units in their current state. At least a couple of them will shock you without being properly wired beforehand. Below is a list of the specific issues for each unit. Dbx (Project 1) model 290 -- Unit does not power on with the correct adapter, dbx didn't have much advice when I contacted them about it.

The proper adapter is supplied, though I assume the jack needs re-soldered on the PCB. Aphex 208 EasyRider (2-channel model) -- unit powers on, but does not pass a signal when set to'out' and I'm unclear on where the signal path is cutting out. PreSonus FirePod -- needed a new power switch and never got around to it, 3-pin jumper clamp - pretty simple fix.

PreSonus MP20 -- this one's a doozy since it's a latter day model; I wanted to perform the revive-style mod and upgrade the caps, op-amps, and transformers to the original Jensen's. However, since this was one of the'outsourced' production models, the PCB was less apt to mods and one of the traces ended up getting cut near a capacitor in the center of the board. All of the capacitors have been removed, though the original transformers and op-amps are intact.

I believe it requires 470uF 16V bipolar capacitors and a surface-mount resistor or two. It'll be a pretty labor-intensive repair that a professional should perform. It's a great pre-amp but will take some additional time and resources to get back to operation.

ART MultiVerb II -- had intermittent output issues, pulled it apart to change the internal battery and re-solder some cold joints; but never finished the repair. Should be pretty simple, as it did work when I disassembled it. Crown MX4 Crossover -- checked the circuit and cleaned it up but all of the LED's stay lit when powered, unsure what the actual issue is. I assume that there's a bad ribbon cable in there. Furman Q-151 Graphic Equalizer (15-band, stereo) -- PCB is removed from the unit, the switches on channel one need replaced, but channel 2 works properly.

Should be an easy fix if you have the proper replacements. Sunn SPL 4120 Dual 10-Band EQ -- worked when I disassembled it, swapped all of the faders on channel 2 and couldn't get it properly re-wired. There is a ground terminal that needs connected before powering.

Please do not power it in the current state, as it's not properly grounded and will shock you - be advised. MXR model 172 (mono 1/3 octave EQ) - some moron ripped the high-pass button off the panel and a couple of the faders are broken. Probably one of the quicker fixes here if you have the proper materials.

The switch panel has been removed but will be included. The item "Huge Lot of 9 Rack-Mount Pro Audio Processors for Parts/Repair" is in sale since Sunday, October 31, 2021. This item is in the category "Musical Instruments & Gear\Pro Audio Equipment\Signal Processors/Rack Effects".

The seller is "veggyburger" and is located in Berlin, Ohio. This item can be shipped worldwide.

Number of Channels: 2
Input/Output Ports: 6.35 mm (1/4") TRS/TS In
Analog/Digital: Analog & Digital
Effect/Enhancement: Compression/Limiting
Type: Microphone Preamplifier
Features: Active
Brand: PreSonus
Form Factor: Rack Mountable
Rack Unit Height: 2U