The price has been drastically reduced. 2025/11/21 sales price 448,000 yen Vacuum tubes, capacitors, and deteriorated parts have been replaced and maintained. Comes with a step-up transformer! A separate amplifier that is still popular even now, 70 years after its release. The thickness, luster, and tension of the sound are all emotionally composed, and perfectly express the sound of the instrument. Anyway, it is a famous machine with thick, firm mid-bass, and a tasteful sound unique to vacuum tubes. There are threads and dirt on the exterior. Serial 36613/65790/36505 ※ As a result of prioritizing output differences centered on balance volume, there is a difference between left and right when maximized (Murakoshi Yoichi)
Maintenance information: 2025.11.20 Maintained (QUAD2 (common): block capacitor 15 μF x 2 ham noise replacement and mounting hardware manufacture x 2, film capacitor 0.1 μF deterioration x 2 replacement, 3 W 1 x 2 resistor replacement, vacuum tube socket caulking repair. QUAD22: Block capacitor 15 μF x 3 → electrolytic capacitor replaced with 22 μF, 1/2 W defective resistor replacement/1 W x 4 resistors replaced, gang error improvement countermeasure 4 resistors added, lamp instability replacement/RCA jack and vacuum tube socket caulking repair. Operation has also been checked with AC 220V (rated output measured at 14W SP: 16Ω)
Accessories: instruction manual (copy), step-up transformer
Main specifications: 13W (16Ω) with rated output AC220V [QUAD22] EF86 × 2 ECC83 × 2 input PHONO, RADIO, TAPE W267 × H89 × D148 mm 3.2 kg [QUAD2] KT66 × 4 EF86 × 2 GZ32 15W+15W W321 × H162 × D119 mm 8.2 kg