Maintained! The entry model for Yamaha premain amplifiers from the late 70s. Although it is an entry model, it is designed around a phono circuit, so it has a unique taste compared to the current model. There are many scratches and small scratches on the exterior (Hiura Katsutsugu)
Maintenance information: 2022.10.4 maintenance (main volume replacement. Tone control circuit IC deterioration replacement. (Switch and volume decomposition, polish contacts, and apply contact cleaner.)
Accessories: none
Main specifications: 40W+40W (8Ω) PHONO (MM/MC) compatible W435 x H112 x D338 mm 7.8 kg
It's been maintained! We thoroughly maintained everything from capacitors to transistors, SP terminals, and RCA terminals. The delicate and beautiful sound, which can be said to be the origin of Yamaha tones, has been revived with a refreshing effect. The smooth, textured sound quality of stringed instruments and vocals is so complete that it easily exceeds modern premain amplifiers in the same price range. The appearance has a feeling of use, such as scattered dents. Serial 10605 (Hiroki Aso)
Maintenance Information: 2022.6.4 Maintained (electrolytic capacitor, transistor, SP terminal, RCA terminal replacement board cleaning, re-soldering heat dissipation sheet replacement semi-fixed resistor, cement resistor, fuse Resistance, fuse, relay exchange input waveform confirmation load test (1kHz sine wave 8Ω load: A class 30W+30W B class 120W+120W sound output test)
Accessories: copy of instruction manual
Main specifications: B-grade 120W+120W/8Ω A grade 30W+30W/8Ω W461 × H170 × D360mm 20kg
The price has been reduced. 2023/6/7 sales price 55,000 yen with original box. A pre-main amplifier for the high-resolution era compatible with DSD 5.6 MHz native playback and PCM384 kHz. It is equipped with cutting-edge equipment such as a USB DAC function, and has a convenient design that can be easily operated with only knobs and buttons. It boasts a clear and wide range that matches the times. There are no particularly large noticeable scratches on the exterior (Oikawa Tetsuji)
Maintenance information: 2023.6.7 operation confirmed
Accessories: remote control, instruction manual, power cable, original box
Main specifications: 100W+100W (8Ω) input 9 systems (CD x 1 tuner x 1 line x 3 phono mm x 1 optical digital x 1 coaxial digital x 1 USB Type B x 1) output 5 systems (reck-out x 2, subwoofer x 1 headphone x 1, USB-DC out x 1) W435 x H152 x D387 mm 12.1 kg
Maintained! Yamaha's heavyweight premain amplifier. Low frequencies with good damping, supported by a high-quality power transformer, and clear sound typical of YAMAHA. The phono input also covers MC, making it a great specification for analog fans. Also, pre-main separation is possible, and future development into separation is also possible. The exterior has a feeling of use over time, such as dullness and small scratches. Serial 04294 (Hiroki Aso)
Maintenance information: 2023.9.24 Maintained (knob mount, output, bad contact, replacement switch, disassembly, contact cleaner application, left, right, main amplifier circuit, power supply circuit, equalizer circuit, and other boards, soldering correction, input/output pin jack polish)
Accessories: copy of instruction manual
Main specifications: 130W+130W (8Ω) 150W+150W (6Ω) PHONO (MM/MC) pre-main separable W473 x H169 x D464mm 26 kg
Maintained! The A-2000 is equipped with Yamaha's own RICHNESS circuit. Settings can be made by switching between speakers, such as the company's NS-2000 and 1000M. The low frequencies with a rich sense of scale and the transparent tone typical of Yamaha are attractive, and the luxurious structure typical of the bubble period is directly linked to the sound. On the exterior, there is a feeling of use such as dullness and small scratches. Serial 10148 (Hiroki Aso)
Maintenance information: 2023.1.7 Maintained (main amplifier and other circuit boards, soldering, deterioration correction, TAPE terminal replacement, output relay, contact defect, switch, disassembly, contact polishing, input/output pin jack polishing)
Accessories: instruction manual
Main specifications: 130W+130W (8Ω) richness circuit frequency characteristics 5Hz to 100kHz W473 x H169 x D464mm 26 kg
Refresh by replacing 54 capacitors, 80 transistors, and other deteriorated parts! The clear and refreshing sound has been revived. This is the 3rd generation model in the CA-1000 series. Even though the CA-2000's specs have been reduced, its sound characters are the same. It is also convenient to be able to switch instantly between Class A operation and Class B operation with switching. As for the exterior, there are chips on the back of both side panels, and a feeling of use such as dullness and small scratches can be seen (Kobayashi Hitoshi)
Maintenance information: 2023.3.25 Maintained (chemicon, transistor, heat dissipation sheet, SP terminal, RCA terminal, semi-fixed resistor, relay, resistor, diode, fuse, op amp, meter lamp replacement. VR contact cleaning, SW type ultrasonic cleaning. Substrates are re-soldered and flux removed. (Semi-fixed VR adjustment, in-flight cleaning, waveform check, input/output check, various function check F special check, input/output waveform confirmation, load test)
Accessories: instruction manual (copy)
Main specifications: Class B operation 100W+100W (8Ω) Class A operation 20W+20W (8Ω) phono MM/MC compatible W461 x H170 x D360 mm 19 kg
Maintained! The A-2000 is equipped with Yamaha's unique RICHNESS circuit. Settings can be made by switching between speakers, such as the company's NS-2000 or 1000M. The low frequencies with a rich sense of scale and the transparent sound typical of Yamaha are attractive, and the extravagant structure typical of the bubble period is directly linked to the sound. There are many scratches on the exterior, corrosion on the switch, and overall there is dullness (Oikawa Tetsuji)
Maintenance information: 2024.3.20 Maintained (Speaker terminals are processed and attached to something that can be obtained. CD input pin jack replacement. Other pin-jack dents etc. were disassembled and reworked. Disassemble the switch and volume contacts, polish them and apply contact cleaner. (Corrected soldering on all boards including the main amplifier board, equalizer board, etc.)
Accessories: instruction manual
Main specifications: 130W+130W (8Ω) richness circuit frequency characteristics 5Hz to 100kHz W473 x H169 x D464 mm 26 kg
We have drastically reduced the price. 2021/7/31 Sales price 128,000 yen 2020.10.22 overhauled. Delicate and beautiful sound that can be said to be the origin of Yamaha Tone has been revived with a refreshing effect. The smooth, textured sound quality of stringed instruments and vocals is just as complete as light as well as modern primain amplifiers in the same price range. The appearance is uneven rubbing on the top plate and rust on the rear chassis. Serial 11612 (Kondo Hirotsugu)
Maintenance information: 2021.7.31 operation check
2020.10.22 Maintained (lamp, acid gold resistance, semi-fixed resistor, fuse resistor, relay replacement. All VR, SW disassembly cleaning Offset, idle current adjustment. (Check input/output waveform, left and right balance check, load test, and comprehensive operation test to confirm normal operation)
Accessories: Manual copy
Main specifications: Output 30W+30W (Grade A), 120W+120W (Grade B) W461×H170 × D360mm 20kg
Overhauled! The delicate and beautiful sounds that can be said to be the origin of Yamaha tones have been revived with a refreshing effect. The smooth, textured sound quality of stringed instruments and vocals is a perfect addition to the premain amplifier in the same price range. Appearance is Kusumi, there are small scratches (Sasaki Shota)
Maintenance Information: 2020.2.21 Maintenance (chemicon, heat dissipation sheet, SP terminal, RCA terminal, semi-fixed resistor, relay, wheat bulb, fuse replacement. VR contact cleaning, SW ultrasonic cleaning. Substrates re-solder, flux removal. Semi-fixed VR adjustment, cabin cleaning, waveform check. I/O check, various function check, F special check, sound output check)
Accessories: Instruction manual copy
Main specifications: 120W+120W/8Ω · B class 30W+30W/8Ω · A class W461 × H170 × D360mm 20kg
Restored product with 34 transistors, 40 power supply capacitors, and other deteriorated parts all replaced. The delicate and beautiful sound, which can be said to be the origin of Yamaha Tone, has been revived with a refreshing effect. The smooth and textured sound quality of stringed instruments and vocals is so complete that it easily exceeds modern pre-main amplifiers in the same price range (Sasaki Shota)
Maintenance information: 2022.3.26 Maintained (electrolytic capacitor, transistor, SP terminal, RCA terminal replacement. Also, cleaning and re-soldering the substrate. Transistor heat dissipation sheet replacement, electrolytic capacitor transistor semi-fixed resistance fuse resistor fuse relay replacement, input waveform confirmation, load test (1kHz sine wave, 8Ω load: A class 30W+30 (W, B class 120W+120W, OK) sound output test.)
Accessories: Instruction manual copy
Main specifications: Output 30W+30W (A grade), 120W+120W (B grade) W461 × H170 × D360mm 20kg
Replace deteriorated parts and refresh! The clear and refreshing sound has come back to life. This is the third generation model in the CA-1000 series. Even though the specs of the CA-2000 were downgraded, the sound characters are the same. It is also convenient to be able to switch instantaneously between Class A operation and Class B operation by switching. On the exterior, there is a feeling of use over time, such as dullness and small scratches scattered around. Serial 10233 (Asae Tomonori)
Maintenance information: 2023.3.25 Maintained (chemicon, transistor, heat dissipation sheet, SP terminal, RCA terminal, semi-fixed resistor, relay, resistor, diode, fuse, operational amplifier, meter lamp replacement. VR contact cleaning, SW ultrasonic cleaning. Resolder substrates and remove flux. (Semi-fixed VR adjustment, in-flight cleaning, waveform check, input/output check, various function checks F special confirmation, input/output waveform confirmation, load test)
Accessories: copy of instruction manual
Main specifications: 100W+100W during Class B operation (8Ω) 20W+20W during Class A operation (8Ω) Phono MM/MC compatible W461 x H170 x D360 mm 19 kg