※It has a cigarette smell, so it's cheap. Currently sold. 115V specification A power amplifier that is supported by a heavyweight power transformer and reproduces tight low frequency reproduction with good visibility. It shows high cost performance that exceeds size and price. There are scratches on the exterior. Serial 217380XCK00185 (Tamura Eiji)
Maintenance information: 2024.4.16 Operation confirmed
Accessories: none
Main specifications: 45W+45W (8Ω) 75W+75W (4Ω) W483 × H51 × D295mm 7.5 kg
The disposal price has been reduced. Member discounts are not applicable. 2023/6/12 sales price 49,800 yen ※1 mono amplifier only. The display lamp visible through the lattice is a transistor mono power amplifier with an indescribable design. As for the sound quality, it is a powerful sound with a sense of overhang while making you feel thick, and the low frequencies are not sluggish, making you listen to a pleasant sound. The exterior is dull all over, scratches on the top plate, etc., and there is a feeling of use (Kobayashi Hitoshi)
Maintenance information: 2023.6.13 Maintained (output relay contact correction input volume disassembly contact correction protection circuit transistor replacement input terminal polish)
Accessories: none
Main specifications: effective output 150 W, input level adjustment, SNR 110 dB, dimensions W436 x H95 x D328 mm, weight 11.5 kg/1 unit
The disposal price has been reduced. Member prices are not applicable. 2024/3/7 sales price 128,000 yen Maintained! A crisp, bright, and sharp sound typical of Marantz from the 1970s. Exactly, it's an American sound on the west coast. The design is also a simple design typical of US Marantz. ※The leg is out of stock. The exterior has dullness and small scratches. Serial 4180 (Yonejima Satoshi)
Maintenance information: 2024.3.7 Maintained (single CH power stage transistor replacement. Screwdriver transistor resistor replacement. Drive Tr Capacitor Replacement Contact polishing, aging test)
Accessories: No accessories
Main specifications: 125W+125W (8Ω) W445 × H170 × D265 mm 14.8 kg
The price has been drastically reduced. 2024/3/2 sales price 99,800 yen Maintained! professional monitor amplifier It has strength unique to commercial use, and the driving power in the low range is truly remarkable. However, it also has a strong sense of temperature typical of a quad, so it is an amplifier that I would like people who are shunned when the sound is too straight for commercial use to try it once. You can see a feeling of use, such as appearance, dullness, abrasions, etc. (Kobayashi Hitoshi)
Maintenance information: 2024.3.2 maintained (internal dismantling all check, Tr, C, R check, ±B INPUT bypass C replacement, Tr, R, etc., all OK, INPUT photocoupler check, operation check)
Accessories: copy of instruction manual, power cord, dedicated SP cord (cable length 2.5 m)
Main specifications: 100W+100W (8Ω) W483 × H88 × D310 mm 12.5 kg
*Currently sold. 120V specification. CROWN commercial power amplifier. It features driving power unique to professional use that lifts straight. The high braking power at high volume fully demonstrates the quality of a professional device. The exterior is dull. *There are no fixing brackets for mounting racks. Also, the AC plug has been replaced. Serial 8001294201 (Tamura Eiji)
Maintenance information: 2024.4.11 operation confirmed
Accessories: none
Main specifications: output 25W+25W (8Ω) 120V specification natural air cooling method W483 × H45 × D213 mm 4.5 kg
※Since it has poor loudness and balance, it is inexpensive and is sold as is. The pre-main amplifier with a simple design and tone typical of Yamaha has a clear sound, and it plays the source honestly. There are footprints on the top plate, small scratches, and dullness (Oikawa Tetsuji)
Maintenance information: 2024.3.24 Operation confirmed
Accessories: none
Main specifications: 105W x 105W (6Ω) W435 x H139 x D330 mm 9.0 kg
The disposal price has been reduced! (Member prices are not applicable) 2024/3/27 sales price 128,000 yen Maintained! Quad power amplifier. Despite its compact body, you can enjoy a smooth, thick sound. It really goes well with speakers made in England, and makes you listen to 70s analog sound with a sense of dynamism. On the exterior, there are scuffs scattered on the top surface, and many other small scratches can be seen. Serial 22063 (Yonejima Satoshi)
Maintenance information: 2024.3.27 Maintained (INPUT DIN connector replaced, DW4P-RCA female cable created. All internal checks. Lch power stage Tr x 3, DC cut C, gain setting C exchange. AC line fuse installation. Operation check)
Accessories: power cord, connection cord
Main specifications: 100W+100W frequency characteristics 20 to 20 kHz dimensions W341 x H115 x D195 mm weight 9 kg
The disposal price has been reduced! (Member prices are not applicable) 2024/3/22 sales price 128,000 yen Maintained! Quad power amplifier Despite its compact body, you can enjoy a smooth, thick sound. It really goes well with speakers made in England, and makes you listen to 70s analog sound with a sense of dynamism. The exterior has a feeling of use such as dullness. Serial 41000 (Tomoho Asaine)
Maintenance Information: 2024.3.22 Maintained! (Internal check DC cut C, gain setting C, etc., exchange Tr, etc. check operation check, DIN4P-RCA female cable creation)
Accessories: power cable
Main specifications: 100W+100W frequency characteristics 20 to 20 kHz dimensions W341 x H115 x D195 mm weight 9 kg
The disposal price has been reduced. Member prices are not applicable. 2024/3/21 sales price 128,000 yen Maintained! Quad power amplifier Despite its compact body, you can enjoy a smooth, thick sound. It really goes well with speakers made in England, and makes you listen to 70s analog sound with a sense of dynamism. The exterior has a feeling of use appropriate for the model year, such as line scratches on the top plate, rubber footprints, and overall dullness (Mizusaki Ryo)
Maintenance information: 2024.3.21 maintained (internal Tn, C, R check, Tn OK, gain setting C, DC cut C, etc. → replacement, DINININPUT connector replacement, cable creation ~ operation check)
Accessories: power cord, connection cord, copy of instruction manual
Main specifications: 100W+100W frequency characteristics 20 to 20 kHz dimensions W341 x H115 x D195 mm weight 9 kg
The disposal price has been reduced. Member discounts are not applicable. 2024/3/20 sales price 128,000 yen Maintained! Quad power amplifier. Despite its compact body, you can enjoy a smooth, thick sound. It really goes well with speakers made in England, and makes you listen to 70s analog sound with a sense of dynamism. You can see a feeling of use such as appearance, dullness, abrasions, scratches, stains, etc. (Kobayashi Hitoshi)
Maintenance information: 2024.3.19 maintenance (DIN connector replacement, resistance in both other channels, capacitor replacement, each Tr all check)
Accessories: connection cable, power cable, instruction manual (copy)
Main specifications: 100W+100W frequency characteristics 20 to 20 kHz dimensions W341 x H115 x D195 mm weight 9 kg
Maintained! A classic British Quad stereo power amplifier. Small in size yet full torque. The sound, which is as deep as a tube amp, exudes an appeal that won't fade. The exterior has a feeling of use over time, such as dullness and small scratches. Serial 62226 (Yonejima Satoshi)
Maintenance Information: 2024.3.25 Maintained (INPUT DIN 4P replacement, internal Tr, C, R all checks. DIN4P-RCA female cable created. Operation check, pattern solder processing)
Accessories: power cable, connection cable
Main specifications: 45W+45W W120×H159×D324mm 8.2 kg
Maintained! A classic British Quad stereo power amplifier. Small in size yet full torque. The sound, which is as deep as a tube amp, exudes an appeal that won't fade. There is a feeling of use such as dullness. Serial 3121 (Takasaki Atsushi)
Maintenance information: 2024.3.22 maintained (INPUT DIN4P and AC connector replacement, DIN4P-RCA x 2 (1m) creation, internal check, DC cut C, coupling C replacement, RCH offset VOL exchange, constant change in constant voltage circuit)
Accessories: copy of manual, power cord, connection cord
Main specifications: 45W+45W W120×H159×D324mm 8.2 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