Comes with a wood case The deteriorated capacitors etc. have been replaced and refreshed! It is a model that was sold between the first stereo preamp C20 and Tubyu's last preamp C22, and was only sold for a very short period of time. The highly perfected sound made during the maturity period of vacuum tube amplifiers, which is a bit different from the C20 and C22, is attractive. The exterior is varnished on the cabinet, and there are small scratches and dullness etc. on the main body due to use over time (Murakoshi Yoichi)
Maintenance information: 2026.6.18 maintained (2 block capacitors, 1000 μF replacement, wiring re-soldering treatment, 1/2W resistors replaced with American-made resistors, 1/4 W 6 resistors added, main volume cleaning and repair, restored to original input circuit, 4 short pins added, vacuum tube socket and RCA jack caulk repair. Operation has been checked with AC 100 to 117 V)
Accessories: instruction manual (copy)
Main specifications: use ECC83 x 6, W388 x H179 x D360 mm, weight 7.46 kg