TC Electronic M5000 Digital Multi-Effects Unit Rare Vintage ADA-1 ADA-2 DSP-1+ x2

For sale is a rare vintage TC Electronic M5000 Digital Multi-Effects Unit. It's in good shape overall with some minor signs of wear from racking. It's loaded with four cards: ADA-1, ADA-2, DSP-1+ x2. We did some servicing to this including a power supply recap and battery replacement. This is a classic vintage TC Electronic rack effect. From long-time owner's private smoke free home studio. It's tested and fully functional but because it had a dead battery, there is now a "Serial mismatch error" on power up. TC support is working on a solution for this. In the current condition, the unit is fully functional and you can get around the "serial mismatch error" situation by pressing "undo" when the error screen comes up and the unit will boot normally and work. If we hear back from TC with a solution, we will update the listing. Due to this one issue, this is sold as-is, no refunds or returns, but it will arrive as described. We will test it again before shipping to ensure that it's still operational.