Sun Valley audio selector. You can now select 3 preamps, 5 power amplifiers, and 3 speakers according to the model number. In the power amplifier switching unit where stability is required in particular, the 4 unselected systems are designed to short between input HOT-COLD, and the output is connected to a dummy load. It is possible to switch amplifiers safely. There are no visible scratches on the exterior, etc., and it is only dull (Kobayashi Hitoshi)
Maintenance information: 2026.3.11 continuity confirmed
Accessories: none
Main specifications: 3 input/pre systems, 5 power systems, SP3 system W420 x H130 x D360 mm 10.5 kg