Maintained! This MC boost transformer is ideal for SPUs using the No. 6600 JS transformer. The sharp high frequencies and the tenacious sound in the mid and low frequencies make the SPU sound even more energetic. The exterior has small scratches, paint peeling, etc. (Satoshi Yonejima)
Maintenance information: 2026.4.23 maintained (miswiring correction switch disassembled, polished, cleaned, coated with protective agent, replaced due to grommet damage, RCA terminal, caulked, operation check gain approx. 42 dB)
Accessories: No accessories
Main specifications: boost ratio 31 times with bypass function, primary impedance 1.5 ohm/secondary impedance 1.5 kΩ dimensions W90 x H68 x D88 mm weight 420 g