Maintained! An eye-catching diamond-tone power amplifier with a rugged design. The extrusion of the mid-range is clear and the sound is slightly firm, but the sound is good, so it seems to go well with jazz and rock. There are small scratches and dents on the exterior as a whole (Mizusaki Ryo)
Maintenance information: 2024.6.1 Maintained (replacement of deteriorated transistors and capacitors in each circuit. Input volume and output relay contact correction. Electric circuit adjustment)
Accessories: copy of instruction manual
Main specifications: 2 mono construction system 100W+100W (8Ω) W425×H170×D285mm 16.5 kg
The disposal price has been reduced. Member prices are not applicable. 2024/5/30 sales price 398,000 yen ※It is cheap because there are many scratches. Maintained by Taiyo International. This time it comes with a special battery BPS-2. Geoff Roland's peak stereo power amplifier. Genuine Oba Shoji product. A thorough non-resonance design using the company's traditional hard aluminum material. The high range with a sense of transparency and sharpness, the mid and low range with a sense of speed and driving power, and a vivid and satisfying sound are attractive. The exterior has scratches, line scratches, and dirt marks (Ryo Mizusaki)
Maintenance information: 2024.5.2 manufacturer maintained (BPS-2: internal cleaning, battery replacement, inspection of various parts, operation inspection. (Model2: Inspection of each part, characteristic inspection, running test)
Accessories: power cord, connection cable
Main specifications: 75W+75W (8Ω) GAIN26/32dB with changeover switch, input impedance with HIGH/LOW changeover switch, input impedance switching W445 × H133 × D362mm 21kg BPS-2: W445 × H133 × D362 mm weight 22 kg
The price has been drastically reduced. 2024/6/4 sales price 698,000 yen Oba Shoji genuine 2nd generation mono amplifier equipped with an ultra-high speed switching power supply. The suppleness, delicacy, and strength are all first-class products. First of all, I was surprised by the smooth, cored sound. The driving power is also excellent, and it has the ability to easily drive high-class speakers. There are 2 noticeable paint peeling spots on the top plate and light scuffs and minor scratches in places (Sasaki Shota)
Maintenance information: 2024.6.4 operation confirmed
Accessories: instruction manual, power cable, connection cable
Main specifications: 200W+200W (8Ω) 350W+350W (4Ω) main body W445 × H97 × D335 mm 13.5 kg/unit power supply unit W445 × H97 × D319 mm 13.7 kg/unit
The price has been reduced. 2024/5/17 sales price 378,000 yen The flagship model of a Macintosh power amplifier with silver panel specifications. It is characterized by its strong, dense sound. The extrusion is strong and goes great with JBL large monitor speakers. The dynamism in the mid to low range, which is difficult to obtain with current Mackin power amplifiers, is attractive. There are scratches, dullness, and discoloration in places (Kojima Yosuke)
Maintenance information: Maintained on 2020.8.26 (2 input volumes, 4 semi-fixed volumes, 2 RCA plugs, 12 lamps, 8 electrolytic capacitors, replacement input mode switch disassembly cleaning, card edge cleaning, soldering, bias and offset check, output sound check)
(*The interior and exterior have been cleaned.)
Accessories: power cable
Main specifications: 500W+500W (1000W when mono) equipped with power guard circuit W483 x D465 x H263 mm 60.3 kg
The price has been reduced. 2024/6/1 sales price 378,000 yen Maintained! The flagship model of the Macintosh power amplifier with a silver panel. It is characterized by its strong, dense sound. The extrusion is strong and goes great with JBL large monitor speakers. The dynamism in the mid to low range, which is difficult to obtain with current Mackin power amplifiers, is attractive. There are scratches and stains on the exterior, and rust can be seen on the top plate and back panel (Mizusaki Ryo)
Maintenance information: 2024.6.1 maintained (transistor in driver board, LDR, capacitor deterioration, GAIN, VOL noise, meter board capacitor deterioration, power supply board capacitor deterioration, meter lamp, display lamp deterioration → replacement. Meter dismantling terminal lead wire soldering treatment, MODE SW dismantling cleaning, operation check, power stage check OK)
Accessories: power cord, copy of instruction manual
Main specifications: 500W+500W (1000W when mono) equipped with power guard circuit W483 x D465 x H263 mm 60.3 kg
The price has been drastically reduced! 2024/1/18 sales price 49,800 yen Maintained! An American-made amplifier from the 1970s that can hardly be seen today. Circuits for self-preservation, such as security, correction, and protection, have been cut off, and I think that handsome atmosphere is well reflected in the sound. It has the same feeling of use as the model year (Daiki Goto)
Maintenance information: 2024.1.18 Maintained (check capacitors, resistors, transistors, etc. as is OK. bias check)
Accessories: none
Main specifications: size (actual measurement) W406 x H155 x D327 mm weight (actual measurement) 12.2 kg
※There are no operation confirmation issues, but since it is for business use, it will be handed over as is without warranty. It is an attractive amplifier with a maximum output of 100W during 4-channel operation, and the strength unique to commercial use. There is a feeling of use such as scratches and dullness on the exterior as a whole (Ryo Mizusaki)
Maintenance information: 2024.2.3 sound output confirmed
Accessories: none
Main specifications: 80 W x 4 (8 Ω continuous output) 100 W x 4 (4 Ω continuous output) 200 W (BTL 8 Ω continuous output) W480 x H88 x D417 mm weight 12.5 kg
The disposal price has been reduced (member prices are not applicable). 2023/11/26 Sales price 128,000 yen Maintained in 2022/6! An eye-catching power amplifier with its black and large power meter typical of Sansui. It entertains me with its power, which can be felt from its appearance, and its supple, stretchy sound quality. The exterior has dullness, scratches, rust, etc. over time (Oikawa Tetsuji)
Maintenance information: 2022.6.23 Maintained (both channel volumes replaced. SP relay bad contact replacement. Replace protectors, deteriorated transistors, resistors, and diodes in meter boards. Replace deteriorated transistors and resistors in the power supply board. Replace deteriorated transistors and capacitors in the drive board. OUTPUT selector switch cleaning. (General adjustment)
Accessories: none
Main specifications: left and right independent 2 power supply diamond differential circuit effective output 110W+110W (8Ω) load impedance 4 to 16 ohms W482 x H187 x D450 mm 20.3 kg
Maintained! A power amplifier using the AB/LR independent power supply system, which is a further development of the A class B class 2 independent power supply system. Contrary to its solid appearance, it has a beautiful sound with a sense of transparency. The sound quality is moderately tight and firm, and it naturally handles crisp and energetic intonation expressions. The exterior has small scratches and dullness appropriate for the model year (Oikawa Tetsuji)
Maintenance information: 2024.5.12 Maintained (replacement of defective output relay contacts. (Replace deteriorated capacitors in power supply circuits and other circuits)
Accessories: none
Main specifications: 100W+100W (8Ω) compatible speakers 4Ω to 16Ω SNR 110dB W420 x H166.5 x D300 mm 19.2 kg