Maintained in 2024. serial 7-10926. It is a 3-digit serial model 7 with impressive brown knobs. You can enjoy a glossy mid to high range sound with a high sense of transparency and a thick, exquisite balance. It's a model that has been over half a century since it went on sale for analog fans, but it's still one they admire. The lustrous, indescribable tone is an appeal that cannot be enjoyed on modern devices. (MURAKOSHI Yoichi)
Maintenance information: 2024.7.24 maintenance (main volume disassembly, cleaning repair, oil capacitor replacement with BlackBeauty, addition of a diode to protect high-pressure selenium, 1W resistor, 200μF electrolytic capacitor replacement, vacuum tube socket and RCA jack caulking repair. Operation check with AC 100 to 117 V)
Accessories: none
Main specifications: tubular control amplifier, vacuum tube, ECC83/12AX7, 3-stage NF equalizer, NF type step switching control, W453 x H185 x D267 mm, 7.5 kg