* There is no problem with the operation, but it will be handed as it is because it is self-made. A single amplifier using 300B. The details are unknown, but it has a sound quality with a delicate and transparent 300B characteristic. The appearance is dull and small scratches are scattered. (Satoshi Yonejima)
Maintenance information: 2021.9.20 operation confirmed
Accessories: Power cord
Main specifications: Vacuum tube used: Elejammo (300B × 1 · 300BEH × 1) RAYTHEON (VT-48 × 2) SOVTEK (5AR4 × 1) W320 ✕ H215 × D265mm Weight 11.7 kg
Disposal prices have been reduced! (Member discounts do not apply) 2022/11/24 Sales price 1,480,000 yen Maintenance completed! A 300B single amplifier from Kanno Seisakusho, famous for its research on Western Electric amplifiers. It is a mono power amplifier equipped with WE 300B. It is a Japanese western sound with a neat yet rich tone. The exterior has a feeling of use such as dullness (Takahashi Nobuyuki)
Maintenance information: 2022.11.24 Maintenance completed (tube pin cleaning, socket cleaning, internal capacitor, etc., current state OK, bias, adjustment operation check to about .07)
Accessories: none
Main specifications: Vacuum tubes used Western Electric 300B x 1, Toshiba 6 NS7 x 1, 1
Size: W380 mm x D230 mm x H214 mm Weight 13.5 kg/1 unit (actual measurement)
The price has been drastically reduced. 2023/1/26 sales price 450,000 yen maintenance completed! This is a rare ZAIKA AUDIO 300B split push power amplifier. It achieves both the fresh sound unique to the 300B and its strength. It has the ability to play large TANNOY speakers loudly. There are 2 input terminals, but they are the same. There are some dullness and thin scratches on the exterior as a whole, but there are no major scratches that are particularly conspicuous (Kanai Hidetsugu)
Maintenance information: 2023.1.25 maintenance (resistor 1/2W noise and deterioration replacement, 2 x 2, circuit analysis and circuit re-solder multiple treatment, vacuum tube socket and RCA jack cab repair, BIAS and HUM BAL. readjustment. Single CH electrolytic capacitor 47 μF noise exchange. Operation checked at AC 100V (measured with rated output 61 W SP: 16 ohms)
*BIAS and ham balance etc. have been adjusted. Please do not change the order of the vacuum tubes as much as possible.)
Accessories: knob manual
Main specifications: rated output 61 W (actual measurement) Vacuum tubes used in mono: 300B x 4, 6SN7, ECC81 size W400 x H200 x D230 mm 15.3 kg (actual measurement)
*Currently on sale. Single amplifier using PSVANE300B. How about a 300B introductory machine at a reasonable price? There is no gap in volume and it works well (Oikawa Tetsuji)
Maintenance information: 2023.3.29 operation confirmed
Accessories: none
Main specifications: vacuum tube used PSVANE 300B RCA 5693 RCA 5V4G output 6W+6W W350 × H180 × D220 9.5 kg
Kyoto “Kimura no Kimura” special amplifier equipped with 2 x 300B (TRIODE). It combines traditional smoothness and delicate expressiveness, and is finished in a gem where you can feel the size and volume of space reproduction (Atsushi Takasaki)
Maintenance information: 2021.9.25 Maintained (input and output waveform confirmation, load test (1kHz sine wave. (At 8Ω load: 3.5W+3.5W actual measurement), sound output test.)
Accessories: Power cord
Main specifications: Output 3.5W+3.5W (measured) W200 × H220 × D400mm 14.5kg
Below price (2021.3.8 selling price 198,000 yen) HEINTZ & KAUFMAN 300B x 2, Kyoto's “Kimura Audio” special amplifier. Combining traditional smoothness and delicate expressiveness, it is finished in a gem where you can feel the size and volume of space reproduction. (Takasaki Takasaki)
Maintenance Information: 2020.12.20 Maintenance (Vacuum Tube Replacement, Ripple Filter Circuit Board Ground Strengthening, Input/Output Waveform Confirmation, Running Sound Test (48h))
2020.4.26 Maintenance carried out (RCA terminal/ripple filter circuit capacitors/block capacitors/each replacement, input and output waveform confirmation, load test 1kHz sinusoidal wave, 4.5W+ at 8Ω load 4.5W, sound out test)
Accessories: Power cord (general purpose)
Main Specifications: Output 4.5W+4.5W (Measured) W200 × H220 × D400mm 14.5kg
Kyoto “Kimura no Kimura” special amplifier equipped with 2 x 300B (probably Chinese Akebono Electronics). It combines traditional smoothness and delicate expressiveness, and is finished in a gem where you can feel the size and volume of space reproduction (Atsushi Takasaki)
Maintenance information: 2021.9.25 Maintained (input/output waveform confirmation, load test (1kHz sine wave, 8Ω load: 3.5W+3.5W actual measurement), sound output test.)
Accessories: Power cord
Main specifications: Output 3.5W+3.5W (measured) W200 × H220 × D400mm 14.5kg
Nobsound monoblock design power amplifier By using an independent power supply and signal line, the degree of separation is higher than most amplifiers on the market, and you can enjoy better sound quality. There are scratches on the exterior (Fujisawa Yukishi)
Maintenance information: 2024.4.13 maintained (VU meter replacement, vacuum tube pin cleaning, bias check, output sound check)
Accessories: power cord
Main specifications: 10 W x 2, input sensitivity, 500 mV to 2000 mV, input impedance, 100 KΩ, frequency response, 20 Hz to 30 kHz, signal to noise ratio 98 dB, W102 x H335 x D352 mm (excluding protrusions), weight 24 kg
The price has been reduced! 2022/8/4 selling price 100,000 yen Nobsound's monoblock design power amplifier. By using separate power and signal lines, the isolation is higher than most amplifiers on the market, and you can enjoy better sound quality. The exterior has a feeling of use such as slight dullness. (Hiroshi Aso)
Maintenance information: 2022.8.4 operation confirmed
Accessories: electric key cable
Main specifications: Vacuum tube used/Electron Tube 300B-98 Electron Tube 6S7GT Output power: 10W × 2 Input sensitivity: 500mV to 2000mV Input impedance : 100KΩ Frequency response: 20HZ-30KHZ Signal-to-noise ratio: 98dB Volume (W × H × D): 102 × 335 × 352 mm (excluding protrusions) Weight: 24kg