This is a listing for my ADA MP-1 tube preamp. I originally bought this with plans to rebuild my rack of outboard gear from my high school years, but I am thinning out my gear and am happy with my modeling amps at this point. The unit is very clean, the only real issue is the headphone back was broken off before I bought the unit. Also, for ease of use in a rack, I assume the previous owner cut and shortened the power cord. I was told the battery mod had been done, but the unit will NOT save presets at this time. I do not know which firmware or software this is running.

I have a soundbite that a session player friend made for me showcasing the unit, I will add a link.

No returns, refunds or exchanges, unit is sold AS IS. I don’t know a lot about these units. it is my understanding that this is an older model because it has the hole in the top where you can select the input

Here is a description I found online.

The A/DA MP-1 is a classic 1980s MIDI-programmable dual-tube guitar preamp. For historical documentation, user programs, and community resources, enthusiasts typically reference dedicated user forums like ADA Depot or marketplace archives for original eBay print ads. [1, 2, 3]Technical Specifications

• Circuitry: Dual vacuum tube (12AX7) architecture
• Memory: 128 programmable preset locations
• Effects & Control: Built-in digital chorus, programmable stereo effects loop, and full MIDI control
• Inputs/Outputs: Front/rear inputs, stereo left/right outputs, and a headphone jack [1, 2, 3]

Community & Documentation Resources

• User Manuals: Setup guides and firmware details are hosted across amplifier-mod enthusiast sites.
• Preset Sheets: Blank and filled patch template logs are available for download on community forum threads.
• Modifications: Popular third-party updates include gain modifications and battery replacements.