This TSR-12 is in good working condition and has been fully tested. All 12 factory presets produce sound and effects, and major controls including Store, Compare, Parameter buttons, Effects Library, and Bypass all function as they should.

The output volume knob works, though there is a minor intermittent spot where the signal may briefly cut unless the knob is moved slightly. This is common for vintage rack gear and does not affect overall performance. The unit passes a clean signal, and the effects sound great. Minor hiss at high output settings is normal for TSR-series units.

Features tested and working:

• Program select (up/down)
• Store and Compare functions
• Parameter editing & effect adjustments
• Effects Library (Reverb, Delay, Chorus, Pitch, Sample, EQ, Mod, Mix, More)
• Bypass
• Output and headphone jacks
• Display and navigation controls

Cosmetically shows normal rack wear for its age, but nothing that affects use.
Does not include original power supply (standard IEC).

This is a solid, vintage multi-effects processor with classic Digitech sounds — great for guitar, studio use, or collectors.