Maintained! This model from the late 80s is popular for its sound that has a good balance between clarity and thickness. The advantages of components such as power transformers, etc., and the sense of energy in the mid to low range are abilities unique to this era. In particular, it shows its characteristics in jazz and rock. There is a feeling of use on the exterior such as abrasions and whitish dullness (Mizusaki Ryo)
Maintenance information: 2026.3.22 maintained (① main volume dismantling and cleaning ② switch dismantling and polishing (input selector, power amplifier direct, source direct, tape) ③ push switch disassembly and polishing (tone, loudness, subsonic, muting, processor, MMMC switching) ④ output relay replacement ⑤ protector part capacitor replacement ⑥ solder main part repair ⑦ other volume, switch cleaning, inside Exterior inspection and cleaning, removing the pin jack from the rear panel for polishing, operation confirmation)
Accessories: instruction manual
Main specifications: 90W+90W (8Ω) MM/MC compatible phono equalizer W430 × H159 × D446 mm 18 kg
Every corner has been maintained, such as replacing 2 output relays, replacing 4 transistors, disassembling and polishing switches, etc. Upgraded model from AU-D607. The sharp punch is strong, and the sound with a sense of dynamism is superior to the α series. You can enjoy sharp and powerful sound. I recommend this car for people who like analog jazz, blues, etc. You can see a feeling of use such as appearance, dullness, scratches, etc. (Kobayashi Hitoshi)
Maintenance information: 2026.3.22 maintained (main volume replacement, output relay replacement, selector lamp replacement, protector transistor replacement, switch disassembly and polishing (input selector, RECOUT, phono selector, tone, loudness, muting, subsonic) solder main part repair, other volume sound wave cleaning, pin jack polishing, interior and exterior inspection cleaning, adjustment inspection)
Accessories: copy of instruction manual
Main specifications: effective output 90W+90W (8Ω) damping factor 80 (6Ω) W466 × H161 × D431 mm 15.0 kg
Thorough maintenance has been carried out from polishing the internal contacts to replacing the deterioration resistors! The standard ES Primain model released in 1986. It is also equipped with a cartridge load selector, making it a perfect car for those who want to use it in a wide range of ways. The sound has momentum, and the thick sound is attractive. The exterior has scratches on the top plate and a reversal on the veneer on the back side (Mizusaki Ryo)
Maintenance information: 2026.3.22 maintained (① main volume dismantling and cleaning ② switch disassembly and polishing (input selector, speaker, mode, tone, turnover, reckout, cartridge, muting, source direct, subsonic) ③ tone, balance VR sound wave cleaning ④ power amplifier section incombustible resistors (14 pieces) deterioration replacement ⑤ output relay, headphone relay, signal relay replacement ⑥ main solder part repair ⑦ (Pin jack polishing, interior and exterior inspection cleaning, bias adjustment, operation inspection)
Accessories: copy of instruction manual
Main specifications: 105W+105W (8Ω) phono input mm/MC compatible dimensions W470 x H161 x D436 mm weight 18.6 kg
Maintenance has been completed with attention to detail, such as dismantling and cleaning the main volume, disassembling and polishing the switch, replacing 2 output relays, and replacing 2 capacitors. Best buy model from the late 90s. It inherits the traditional diamond actuation circuit, and is characterized by a well-balanced sound with a refined circuit configuration, such as a sense of SN in the mid-high range, and the certainty of the outline in the low range. You can see a feeling of use such as dullness, stains, and abrasions on the exterior (Kobayashi Hitoshi)
Maintenance information: 2026.3.22 maintenance completed (main volume dismantling and cleaning, switch disassembly and polishing (input selector, power amplifier direct, reck-out, processor, MMMCK replacement) switch replacement (tone, speaker A/B, loudness, subsonic) output relay replacement, protector capacitor replacement, pin jack polishing, other volume cleaning, interior and exterior inspection and cleaning, operation confirmation)
Accessories: copy of instruction manual
Main specifications: 80W+80W (8Ω) phono (MM/MC) W432 x H165 x D450 mm weight 18 kg
※The remote control is out of stock, so it's cheap. A popular model that won the Good Design Award. Equipped with Onkyo's unique digital amplifier technology “VL Digital” circuit. The thin yet high power, and the smooth sound is attractive even though it is a digital amplifier. The slim housing allows you to enjoy it anywhere. There are small scratches and a feeling of use. Serial 1810912080A (Fujisawa Yukishi)
Maintenance information: 2026.3.22 operation confirmed
Accessories: power cord
Main specifications: 100W+100W phono MM pre-out/power-in terminals W435 x H82 x D390 mm 11.3 kg
VOL, balance VOL, and other SW decomposition, polishing, cleaning, etc. have been maintained! Each SW has been disassembled and cleaned and maintained! Sony vintage amplifier. It was the flagship model at the time, and I was first surprised by the feeling of extrusion that I could tell the moment it made a sound. The thickness of the mid-range is perfectly combined with the well-contoured sound, and you can feel more power than the specs. There are spots and scratches on the exterior. Serial 21322 (Yonejima Satoshi)
Maintenance information: 2026.2.4 maintained (volume, balance VR disassembly and cleaning, etc. MODESW, FUNCTIONSW BASS, TREBLESW, SPEAKER rotation SW, MONITORSW, TONESW, LOWFILTER, HIGHFILTER, FUNCTION lever SW disassembly, polishing and cleaning, other power supply micro SW, bias adjustment semi-fixed VR x 4, flat AMP Capacitor 3,3uf x 4 deterioration replacement, other RCA input/output jack cleaning, speaker terminal cleaning, front panel, knob cleaning, bias adjustment, sound output running test)
Accessories: No accessories
Main specifications: 80W+80W W400×H149×D327mm 13kg
Beautiful item with original box! A Danish Gato Audio line premen amplifier with an excellent simple and beautiful design. The sound quality is flat with no coloring, but it has a moderately warm color that is not too clean, and it sounds relaxed with a comfortable tone with fine particles. *If you press the heat lamp after turning on the power, the lamp will not turn off for about 30 minutes, but this is a specification. Genuine Zephan There are some minor scratches, but it is generally in good condition. Serial 002100051 (Yamato Yuki)
Maintenance information: 2026.3.21 operation confirmed
Accessories: original box instruction manual remote control power cable
Main specifications: output 150W+150W (8Ω) input: unbalanced (RCA) 4 system*PHONO equalizer is not installed, 1 balanced (XLR) system pre-out: 1 unbalanced (RCA) system, 1 balanced (XLR) system W325 x H110 x D430 mm weight 13.8 kg
Currently sold. The current situation is that there is a slight gap in balance. A high quality model at a low price! Keep it simple, and achieve high quality even though it's an entry-level machine. The driving ability is high, and the sound is sharp and deep. It also comes with a pre-out, so it's convenient when you want to upgrade your class. WBT is used as the speaker terminal. You can see a feeling of use, such as appearance, dullness, abrasions, etc. (Kobayashi Hitoshi)
Maintenance information: 2026.3.18 Operation confirmed (light balance)
Accessories: power cable, copy of instruction manual
Main specifications: rated output 70W+70W (4Ω) 60W+60W (6Ω) 50W+50W (8Ω) W440 × H124 × D340 mm 7.5 kg
*230V specification. Please note that it cannot be used in Japan unless a transformer transformer is used. Pre-main amplifier with built-in tuner Rich functions such as PHONO input and subwoofer output are built-in. It is ideal for easy use around the TV. *FM antenna is missing. There are threads and small scratches on the exterior. Serial Y083230XZ (Satoshi Yonejima)
Maintenance information: 2026.2.10 Operation confirmed (sound output confirmed using a step-up transformer)
Accessories: remote control, iPod dock
Main specifications: 75W×75W W435×D410×H150mm 9.8kg
The price has been drastically reduced. 2026/3/17 sales price 298,000 yen This is a rare arrival! A single amplifier using a triode EL519. It is an amplifier equipped with a clear high range with a unique sense of transparency and a mid-range with various nuances. It has a powerful tube-like sound, and has a unique personality like no other. There is dullness and minor scratches on the front panel (Daiki Goto)
Maintenance information: 2024.11.19 Operation confirmed
Accessories: power cable
Main specifications: 14.5W+14.5W (8Ω) vacuum tube EL519×2/PCC88×2/ECC85×2 W400×H150×D400mm 20kg
The price has been drastically reduced. 2026/3/12 sales price 178,000 yen After 13 years, this is the first time in stock in a long time! 39 transistors, 25 transistors have been replaced, and maintenance has been completed, including volume and switch contact polishing! Usmarantz final premain amplifier. This product pursues low TIM (transient intermodulation distortion) and transient mixed modulation distortion. It is rare for this model to arrive, so I think it would be difficult to find one that has been maintained. Why don't you take this opportunity (Daiki Goto)
Maintenance information: 2026.3.12 Maintained (transistors and capacitors in the main amplifier circuit tone circuit flat amplifier circuit have deteriorated. Replace 2 FETs in the main amplifier circuit, 2 adjustment volumes, 21 transistors, and 14 capacitors. Replace 4 flat amp circuit transistors, 3 capacitors, 14 tone circuit transistors, 8 capacitors, 2 resistors. Switch and volume contact polishing. I/O pin jack polish. Earth terminal polish. DC adjustment, idling current adjustment)
Accessories: none
Main specifications: W416 x H146 x D316 mm weight 15.0 kg power amplifier section effective output 90W+90W (8Ω)) 115W+115W (4Ω)
Maintained! A pre-main amplifier developed with the aim of achieving driving capability that enables optimal playback at all times without being affected by differences in speaker size or impedance. Please experience the natural and powerful sound typical of Yamaha (Daiki Goto)
Maintenance information: 2026.3.20 Maintained (disassembly contact polishing due to switches. Output relay and headphone relay contact defect replacement. Disassemble and clean the rear panel, etc. (I/O pin jack polish)
Accessories: none
Main specifications: power consumption 260 W rated 185 W+185 W (6 ohms) W473 x H171 x D448 mm 20 kg
Maintained by the manufacturer! The first model in the highly popular 2000 series. It has the most powerful sound in the series. It is MM/MC compatible and is recommended for analog fans. There are scratches and scratches on the exterior. Serial 6101503600 (Fujisawa Yukishi)
Maintenance information: 2026.3.20 manufacturer maintained (left and right relays replaced. Power amplifier board, solder deterioration area inspection and correction. idling adjustment. MM/MC switching, REC selector, input selector, and disassembly contact cleaning for each switch. (Source direct switch correction)
Accessories: power cord
Main specifications: 160W+160W (4Ω) line input 4 systems phono 1 system (MM/MC switching tape system 2 systems W434 x H180 x D478 mm 20 kg
Maintenance has been completed, including replacing 11 capacitors and polishing the switch shaft and pin jack! The vintage Luxman premain amplifier, the L-507, has arrived. The rich, glossy tone is actually Luxman like, and it is an amplifier with traditional lacktones. Although it is a transistor, it has an atmosphere like a tube amplifier (Daiki Goto)
Maintenance information: 2026.3.12 Maintained (panel switch and volume disassembly contact polishing. The transistor and adjustment volume were replaced during previous repairs. The power supply circuit protection circuit capacitor was replaced due to a lack of capacitor capacity. Output relay replacement. DC adjustment idling current adjustment. I/O pin jack polish (Lever switch shaft polish)
Accessories: power cable, copy of manual
Yamaha premain amplifier 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, and boasts a clear and wide range that matches the times. As for the exterior, threads are conspicuous on the top plate. Serial Y105487RT (Tamura Eiji)
Maintenance information: 2026.3.19 Operation confirmed
Accessories: remote control, power cable
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 D387mm 12.1 kg
The price has been drastically reduced. 2026/3/16 sales price 218,000 yen genuine AXISS product. Comes with a remote control. A slim and compact KRELL pre-main amplifier. Although it is a small model, it has a sense of speed and depth, yet it plays a smooth and transparent sound typical of KRELL. On the exterior, bumps can be seen. Serial 17806102428 (Fujisawa Yukishi)
Maintenance information: 2026.3.16 Operation confirmed
Accessories: remote control, instruction manual, power cord
Main specifications: 200W+200W (8Ω) W440 × H89 × D432 mm 14.1 kg
The price has been drastically reduced. 2026/3/13 sales price 128,000 yen*The LINE1 lamp is slightly darker. A Sony ES class stereo integrated amplifier aimed at high quality music playback. We are particular about high-resolution playback, and are reviewing basics such as high-capacity power supplies and high-rigidity symmetrical chassis. Also, there is impedance switching for headphone users, making it convenient as a high-end headphone amplifier. The sound quality is clear and clear. There are small scratches and dullness on the exterior (Hiura Katsuji)
Maintenance information: 2026.3.13 sound output confirmed
Accessories: remote control power cable original box
Main specifications: audio input RCA x 4, XLR x 1 (No. 2 HOT) practical maximum output 120+120W rated output 80+80W, speaker compatible impedance 4 to 16 ohms, W430 x H130 x D420 mm, 17 kg
A complete maintenance item with wood cabinet exterior repair, replacement of each capacitor, and complete volume disassembly and polishing! The famous SQ38FDMK2, which symbolizes Luxman of yesteryear, has been revived through thorough maintenance. In addition to the rich and powerful sound of the 38FD, this model has achieved an even wider range. It is a famous machine boasting a degree of perfection suitable for marking the end of the 38 series in the past. Serial B6101646 (Yamato Yuki)
Maintenance information: 2025.12.18 Maintained (exterior repair/top plate painting. Replaced due to poor rear VOL. Other VR and SW disassembly contacts have been repolished. After re-polishing, an anti-oxidation and sulfation prevention grease is applied. Replacement of parts that have deteriorated over time (11 electrolytic capacitors, 6 film capacitors, 14 oil capacitors, 5 block capacitors, 8 vacuum tube sockets, 8 rectifier diodes, 6 semi-fixed resistors), SW/VOL complete disassembly contacts polished, and grease applied to prevent oxidation and sulfidation. Exterior cleaning, circuit adjustment, input/output waveform confirmation, load test (1 kHz sine wave, at 8 ohm load: 26W+26W), sound output test)
Accessories: instruction manual copy power cable
Main specifications: effective output 30W+30W (4Ω/8Ω/16Ω) dimensions W476 x H190 x D335 mm weight 18 kg
Beautiful item with original box! Accuphase's current pure A class premain amplifier. The pre-section is equipped with a balanced AAVA volume, and all signal flows from the input terminal to the output terminal are perfectly balanced, enabling high-purity transmission. The power section uses the latest instrumentation amplifier system, MCS+ circuit, and the familiar current feedback amplifier circuit. The bottom impedance and 1000 damping factor guarantee enable ideal driving for any speaker. Serial D4Y008 (Yamato Yuki)
Maintenance information: 2025.12.5 operation confirmed
Accessories: original box instruction manual remote control power cable
Main specifications: rated continuous average output 35W (8Ω), 70W (4Ω), 140W (2Ω), 160W (1Ω) total harmonic distortion ratio 0.05% 2-4Ω load, 0.03% 8-16Ω load damping factor 1000 (8Ω 50Hz) W465 × H191 × D428 mm 24.9 kg
Currently sold. A pre-main amplifier representing the Intec 275 series. The insulator that supports the chassis uses DuPont Corian, which combines rigidity and vibration damping, to ensure no resonance and high rigidity. Remote control is missing. You can see a feeling of use, such as appearance, dullness, abrasions, etc. (Kobayashi Hitoshi)
Maintenance information: 2026.3.16 Operation confirmed
Accessories: none
Main specifications: output 43W+43W (8Ω) Phono is compatible with mm Dimensions W275 x H118 x D336 mm Weight approx. 7 kg
The price has been reduced. 2026/3/12 sales price 208,000 yen It has been beautifully revived with side panel repairs! Thorough maintenance was carried out, such as replacing the main volume, power amplifier volume, 2 output relays, 28 transistors, solder repair, and pin jack polishing! This amplifier marked the end of the X series, which began with the AU-X1. Boasting a weight of 35 kg, it is a model that was heavily invested in budget and material volume, just like in the heyday of audio. Please enjoy the powerful and powerful sound of Sansui with full torque. There is paint on the back (Daiki Goto)
Maintenance information: 2026.2.22 maintained (① power amplifier section power transistors, transistors (10 pieces) resistors, replacement ② flat amplifier transistors (4 pieces) replacement ③ selector lamp replacement ④ main volume, power amplifier volume replacement ⑤ switch disassembly and polishing (input selector, power amplifier operation, speaker, jump, subsonic, tape copy) ⑤ phono relay (8 pieces), Transistor (10 pieces) replacement ⑥ solder repair ⑦ interior and exterior inspection and cleaning, pin jack polishing, output test, bias adjustment)
Accessories: copy of instruction manual
Main specifications: effective output 150W+150W (6Ω) 110W+110W (8Ω) W470 x H178 x D486 mm weight 35.1 kg
The switch volume was disassembled and polished, and 44 transistors, capacitors, etc. were replaced and maintained in 2025/4. The clear and refreshing sound has been revived. The third generation of the CA-1000 series. It is a model with reduced specifications of the CA-2000, but it has inherited the sound character. Class A operation and Class B operation can be switched by switching. On the exterior, there are stains on the cab. Serial 13433 (Yonejima Satoshi)
Maintenance information: 2026.3.6 Maintained (The input board has been repaired and adjusted.) 2025.4.16 Maintained (all switches and volumes disassembled and polished. Tone control circuit power supply circuit and other deteriorated parts replacement (26 transistors, 4 diodes, 18 capacitors replaced) input/output pin jack polish)
Accessories: instruction manual
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
The price has been reduced! 2026/2/23 sales price 99,800 yen with box! A model commemorating the 10th anniversary of establishment. The chassis has been redesigned and renewed while keeping the basic concept of SA1.0 intact. Sound quality and functionality have been upgraded. The circuit has a completely non-feedback discrete configuration, which improves driving ability and allows you to hear sound with a high sense of silence. The exterior is generally good, although there is a feeling of use such as dullness. Serial 220130004 (Tomonori Asaine)
Maintenance information: 2026.2.23 Operation confirmed
Accessories: instruction manual, power cable, spike, original box
Main specifications: 10W+10W (8Ω) headphone output 3W+3W (32Ω) W430 × H102 × D418 mm 8.0 kg
Maintained including volume, switch disassembly and cleaning, 59 deteriorated capacitors, lamps, relays, and resistor replacement! Yamaha's natural sound, which makes you feel refreshed, has been completely revived! The smooth sound that is familiar to the ears is unique to Yamaha in this era. It is possible to switch between Class A and Class B operation with a single switch. There is dullness over time (Daiki Goto)
Maintenance information: 2026.2.24 Maintained (electrolytic capacitor, tantalum capacitor, semi-fixed resistor, switch, microphone terminal, lamp replacement. Each volume is cleaned, and switches are disassembled and cleaned. Cleaning panels, knobs, housings, and terminals. (Other parts will be readjusted and aging tested)
Accessories: copy of the manual
Main specifications: 15W+15W (8Ω/Class A operation) 70W+70W (8Ω/Class B operation) W436 x H144 x D323 mm 15.5 kg
Maintained in 2024 October! Genuine Heinz & Co. The amplifiers made by engineers who know how to make people listen to music are persuasive enough. The expressive power of fresh yet glossy musicality is attractive. As for the exterior, there are insulator marks, dullness, small scratches, etc. on the top plate. Serial AAB0464 (Yamato Yuki)
Maintenance information: 2024.10.30 Maintained (each SW, VOL cleaning, RCA, VOL knob, main unit cleaning, internal C, R, etc.
(Current status OK, bias check OK, operation check, not compatible if dedicated parts are defective in the future)
Accessories: remote control instruction manual power cable
Main specifications: 115W+115W (8Ω) input Phono (MM, MC) Line 5 system W440 × H95 × D400 mm 12.5 kg
Maintenance has been completed for the main volume and various switches, such as disassembly, polishing, and cleaning! Sony's classic 333 series model. The strengthened power supply makes the sound pressure feel solid and slightly appealing. Sounds with a sense of weight proportional to appearance are unique to this era. As for the phono circuit, you can enjoy the thick, sharp sound of analog discs with both MM and MC. There is a scratch on the wood panel on the exterior (Mizusaki Ryo)
Maintenance information: 2026.2.18 maintained (maintenance details/ ① main volume dismantling and cleaning ② switch disassembly and polishing (input selector, direct selector, speaker, mode, reckout, cartridge) ③ push switch disassembly and polishing (2 tone, T-over, source direct, mute, subsonic) ④ output relay replacement ⑤ power amplifier circuit part Sankin film resistor replacement ⑥ other volume (Cleaning, solder repair, ground reinforcement, interior and exterior inspection and cleaning, operation confirmation)
Accessories: copy of instruction manual
Main specifications: 105W+105W (8Ω) with phono MM/MC W470 x H165 x D435 mm 21.2 kg
Maintenance has been completed for the main volume and various switches, such as disassembly, polishing, and cleaning! Sony's classic 333 series model. The strengthened power supply makes the sound pressure feel solid and slightly appealing. Sounds with a sense of weight proportional to appearance are unique to this era. As for the phono circuit, you can enjoy the thick, sharp sound of analog discs with both MM and MC. The exterior has a feeling of use such as rust, small scratches, and dullness. Serial 211070 (Takahashi Nobuyuki)
Maintenance information: 2026.2.18 Maintained (main volume dismantling, cleaning, output relay replacement, switch disassembly and polishing (input selector, direct, reck-out, cartridge, speaker, mode, tone, source direct, subsonic, muting) power amplifier part resistor replacement solder main part repair earth enhancement volume sound wave cleaning pin jack polishing, interior and exterior cleaning, bias check, operation inspection)
Accessories: none
Main specifications: 105W+105W (8Ω) with phono MM/MC W470 x H165 x D435 mm 21.2 kg
Maintained! Pre-main amplifier equipped with a linear-step MC transformer. Supported by SANSUI's traditional strong power supply, it has stable driving power, and the sound is dense in the mid-range. It is compatible with JBL 43 series monitors, and is characterized by strength not found in late SANSUI amplifiers. As for the exterior, paint has fallen off the front panel, and there are dullness and small scratches all over. Serial 8220205584 (Yonejima Satoshi)
Maintenance information: 2026.2.18 maintained (① power transistor and various transistors, resistor replacement ② output relay, headphone relay replacement ③ main volume dismantling and cleaning ④ switch disassembly and polishing (input selector, recout, tone, filter, muting, tape, MC conversion) ⑤ balance volume replacement ⑥ phono circuit transistor (16 pieces) capacitor (8 pieces) replacement ⑦ solder repair, other volumes Cleaning, interior and exterior inspection cleaning, pin jack polishing)
Accessories: No accessories
Main specifications: effective output 120W+120W W463 x H160 x D444 mm 17.7 kg
A complete maintenance item with wood cabinet exterior repair, replacement of each capacitor, and complete volume disassembly and polishing! The famous SQ38FDMK2, which symbolizes the Luxman of yesteryear, has been revived through thorough maintenance. In addition to the rich and powerful sound of the 38FD, this model has achieved an even wider range. When combined with tannoy speakers, good sound is added to the soft tone, creating an indescribable depth of taste. Serial K7104586 (Tomonori Asaine)
Maintenance information: 2026.2.15 Maintained (exterior repair/paint balance VOL replacement. Other VR and SW disassembly contacts have been repolished. After refining, apply oxidization/sulfidation prevention grease and replace parts that have deteriorated over time (11 electrolytic capacitors, 6 film capacitors, 14 oil capacitors, 5 block capacitors, 8 vacuum tube sockets, 8 rectifier diodes, 6 semi-fixed resistors), and SW/VOL complete disassembly contacts are polished again, and oxidization/vulcanization prevention grease is applied. Exterior cleaning, circuit adjustment, input/output waveform confirmation, load test (1 kHz sine wave, 8 ohm load: 28 W+28 W) sound output test)
Accessories: instruction manual copy power cord
Main specifications: effective output 30W+30W (4Ω/8Ω/16Ω) dimensions W476 x H190 x D335 mm weight 18 kg
Fully maintained, including deteriorated condenser, vacuum tube replacement, volume dismantling and cleaning! The fourth model in the 38 series, the successor to the FD. The sound with a good view not found in the early Luxman models is attractive. Of course, it is compatible with TANNOY, but it is also compatible with speakers that have a hard sound, such as YAMAHA monitor speakers. Rust is floating (Daiki Goto)
Maintenance information: 2026.2.14 maintained (power supply diode replacement x 8 pieces, board surface polishing and cleaning treatment, 48V speaker power relay integration procedure. Lever switch detachable disassembly contact cleaning. Rotary switch detachable disassembly contact cleaning. Clean the detachable contacts on each switch. Volume detachable disassembly contact cleaning. Power amplifier section bias balance semi-fixed volume exchange x 6, electrolytic capacitor replacement x 10. Pilot lamp conversion to LED, lamp holder replacement, AC power cable replacement. The above steps have been completed, the operating voltage has been checked and adjusted, and the sound output test is good. When the plug is used as the headphone terminal, there is no sound from the speaker terminal. Please refer to it. Primary AC current 1.02A with the power on. Output vacuum tube 50CA10 bias adjustment. Set to 22 mA each (since the bias is fixed, adjustment is necessary when replacing the output tube. Overall output frequency characteristics 15Hz to 60kHz (-3dB) 1W/8Ω Maximum undistorted output 28W+28W (8Ω) approx. 32W+32W in case of 5% distortion. Residual noise 2 mV (However, it varies due to changes in primary AC power supply). Tone control level change BASS 100Hz±5EB Treble 8kHz±5dB, Lowcut Highcut check is normal, and -2 dB level drops when Mode Switch L+R is performed. Other levels do not change.)
Accessories: copy of the manual
Main specifications: 30W+30W vacuum tubes 50Ca10/4, 6AQ8/2, 6267/2, 12AX7/3, 12AU7/1, Frequency characteristics 30Hz to 40kHz W440 x H162 x D343 mm 20.1 kg