MATRIXSYNTH: ARP Solus Analog Synthesizer Keyboard Fully Pro-Refurbished SN 235314x

Friday, October 23, 2026

ARP Solus Analog Synthesizer Keyboard Fully Pro-Refurbished SN 235314x

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via this eBay listing

Additional Tone Tweakers Listings

"There were reportedly only 700 of these made, though that number may be inaccurate. This is one of the only ones you’ll find in this exceptional condition though…

Meticulously refurbished sparing no expense, working perfectly and sounding great. This is not your usual vintage synth sale where the seller cuts corners. If you've wanted a Solus, this is the one to buy, and yes, it's pricey, because we paid our tech for all the time plus new parts it takes to make these better than the rest.

In addition to necessary repairs, we did the usual stuff we do to ARPs to this particular unit:

Cleaned unit inside and out
Replaced jack nuts
Cleaned all jacks
Cleaned and lubed all faders and switches
Rebuilt power supply
Replaced all tantalum capacitors
Replaced all electrolytic capacitors
Recalibrated
Rebuilt keyboard:
Cleaned bus bars
Cleaned j-wires
Replaced bushings
Aligned keys
Multiple systematic tests passed with flying colors

This Solus should make anyone looking for a really nice fully functional example very happy.

We also spotted a design flaw in this model that we confirmed was present in another technician's refurbished Solus as well (thanks, Tony!), so it's not a malfunction, but we wanted to mention it here so it's documented on the web and hopefully other people won't think their Solus is broken if they notice this - it only occurs under certain settings, so most people probably won't... when the VCO2 FM fader is all the way up and the modulation source is set to ADSR, the envelope will also pitch modulate VCO1. It happens less towards the bottom of the keyboard and doesn't always happen every time a key is played. VCO1 modulation stops once the fader is positioned slightly lower than at maximum.

235314x"

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