2019 restored model! The original model 8 is now in stock! This is a famous gem that has both thickness and sex appeal while making a quick sound. There is no boomy sound, which is a drawback of vacuum tube amplifiers, and it is a vintage sound that is still popular today due to its good tone and good balance. The exterior is in a state where there is a feeling of use such as dullness and friction over time. ※The hood is out of stock. Serial 2494 (Yamato Yuki)
Maintenance information: 2019.9.21 Maintained (replaced due to defective block capacitors. Electrolytic capacitors were replaced with SPRAGUE ones. SP terminal deterioration replacement. Foot leg damage and deterioration replacement. BIAS reconditioned vacuum tube socket and RCA jack caulk repair. Other operations have been checked)
Accessories: none
Main specifications: 117V specification vacuum tube EL34 (TELEFUNKEN x 4), 6CG7 x 2, 6BH6 x 2 output 35W+35W W346 x H192 x D250 mm
Maintenance has been completed, including 13 resistors and RCA terminal replacement! A rare 100V specification this time too! DYNACO's tubular mono power amplifiers are highly popular. The sleek, straight, and energetic sound that comes out of the small body is attractive. Combinations with Altech and JBL are a staple, and they make jazz and rock sounds powerful and full of realism. There is dullness over time, rust, etc. (Oikawa Tetsuji)
Maintenance information: 2026.1.19 Maintained (2 input RCA terminals replaced and changed to 100V specifications, soldering inspection and board correction were performed, a complete set of output tube pair tubes and 1 6AN8 vacuum tube was replaced, 13 carbon resistors and 8 metal oxide film resistors were replaced, bias volume and MT tube sockets were cleaned, and the final operation confirmation including checking the characteristics of an 8Ω load of 56 to 60 W at 100V was completed)
Accessories: copy of instruction manual
Main specifications: tubular mono power amplifier using vacuum tube 6550/5AR4/6AN8A output 60W/140W W229 × H190 × D229 mm 11.5 kg
The price has been drastically reduced. 2025/12/17 sales price 99,800 yen Maintained by the manufacturer! Line-only premain amplifier using EL34. The sharp sound of the EL34 tube is impressive. It has a glossy tone unique to tube amplifiers with a modern sense of range and good response. There is a slight dent on the front (Daiki Goto)
Maintenance information: 2025.12.17 Triode maintenance completed (JJ EL34 x 4 units were replaced, and various parts were inspected and maintained, including selector polishing.)
Accessories: manual, power cable
Main specifications: circuit type EL-34 ultra linear connection AB grade push-pull drive rated output 45W+45W (8Ω) SN-ratio 90dB vacuum tubes JJ EL34 x 4, 12AX7 x 1, 12AU7 x 2 speaker output terminals 6Ω/8Ω input 4 systems W330 x H150 x D315 mm 15 kg
*Since the manufacturing period is different for mono, some circuits are also different. Refreshed maintenance has been completed in consideration of long-term use, such as 13 capacitors and vacuum tube replacement! A tubular mono power amplifier that makes you hear a profound, Macintosh sound. The highly transparent sound was restored through an overhaul. You can enjoy the relaxed and calm sound unique to vintage McKinn. This is a power amplifier I would like to try combining songs from yesteryear when I want to enjoy them with speakers from yesteryear. There are scuffs on the body, transformer, etc. appropriate for the model year. Serial 4F406 6F460 (Murakoshi Yoichi)
Maintenance information: 2026.1.15 maintained (fuse replacement, vacuum tube 5U4GB, 12BH7, 12AX7 replacement, oil capacitor 0.5 μF, 2 2W resistors, 0.22 μF 3 pairs, electrolytic capacitor 20 μF1 pair replacement, block capacitor 35/80/15 μF 2 pairs, resistor 1W1 pair replacement. HUM ADJ. RECONDITIONING & VACUUM TUBE SOCKET AND RCA JACK CAKE REPAIR Other operation checked (measured at 50 to 66 W SP: 8 Ω with rated output AC 100 to 117 V)
Accessories: none
Main specifications: 60W load 4Ω/8Ω/16Ω frequency characteristics 20 to 30,000 Hz W356 × H203 × D254 mm 20.7 kg
The internal parts have been thoroughly reviewed and brushed up! This is the famous MQ60 power amplifier with the main part of the SQ38F independent. The natural, smooth sound quality with a high sense of transparency is attractive. You can relax and enjoy classical music and vocals in a natural way. The deep sound quality that cannot be expressed with the latest vacuum tube amplifiers is exceptional. There is dullness (Daiki Goto)
Maintenance information: 2025.12.30 Maintained (all wiring from RCA terminal → VR → amplifier input replaced, running test)
2025.10.15 Maintained (vacuum tube (6267), vacuum tube socket, oil capacitor, electrolytic capacitor, film capacitor, RCA terminal, semi-fixed VR, spark killer, SP terminal, diode, micro SW, fuse replacement. Load test (8Ω load 1kHz 25W+25W), input/output waveform confirmation, sound output check performed.)
Accessories: copy of the manual
Main specifications: output 30W+30W dimensions W410 x H160 x D205 mm weight 13.8 kg
Refresh yourself with an overhaul such as replacing vacuum tube sockets and capacitors! After all, the warm and glossy sound quality is excellent for stringed instruments. It has a soft and vivid sound not found in transistors, making it perfect for listening for long periods of time. The exterior has dullness, small scratches, etc. Serial E1800423 (Fujisawa Yukishi)
Maintenance information: 2025.12.9 Maintained (replaced due to defective vacuum tube (6240G). The bias, DC balance, and distortion have been adjusted again. Load test (8Ω load 1kHz 24W+24W), input/output waveform check, sound output check performed) 2025.11.18 maintained (vacuum tubes (50CA10 x 4 pieces), 4 vacuum tube sockets, 4 electrolytic capacitors, 2 film capacitors, 4 oil capacitors, 2 RCA terminals, 8 semi-fixed VR, 2 spark killers, SP terminals, 5 diodes, micro SW, fuse, power cord replacement. Load test (8Ω load 1kHz 24W+24W), input/output waveform confirmation, sound output check)
Accessories: No accessories
Main specifications: 50CA10 push-pull output 30W+30W W410 x H183 x H160 mm 13.8 kg
The interior has been thoroughly reviewed, such as replacing the vacuum tube socket and condenser, and has been refreshed with a bu-overhaul! After all, the warm and glossy sound quality is excellent for stringed instruments. It has a soft and vivid sound not found in transistors, making it perfect for listening for long periods of time. The exterior is dull. Serial 811243 (Tomonori Asaine)
Maintenance information: 2025.8.11 Maintained (vacuum tube (50CA10×4), vacuum tube socket, electrolytic capacitor, film capacitor, RCA terminal, semi-fixed VR, spark killer, SP terminal, diode, micro SW, fuse replacement. Load test (8Ω load 1kHz 25W+25W), input/output waveform confirmation, and sound output check
*About the NFB changeover switch This unit is equipped with an NFB changeover switch so that you can select the desired sound quality. (However, if you operate this switch during operation of this unit, shock noise will occur, so be sure to turn off the NFB ON-OFF before switching the power switch.)
Accessories: none
Main specifications: 50CA10 push-pull output 30W+30W W410 × H183 × H160 mm 13.8 kg
Maintenance completed in August 2020. Internal and external maintenance has been completed, such as replacing a coupling condenser with an oil condenser, replacing a banana-compatible SP terminal, and replacing a vacuum tube (50CA10)! This model is based on the concept of making sounds even more straightforward than the MQ60. The warmth of the tone and the indescribable luster sound are truly lackstones. You can see the exterior, dullness, scuff marks, paint peeling, etc. (Kobayashi Hitoshi)
Maintenance information: 2020.8.25 maintained (50CA10 x 3, 12BH7 x 1, coupling capacitor, electrolytic capacitor, rectifier diode, semi-fixed resistor, RCA terminal, SP terminal, MT tube socket, fuse replacement. Gain VOL, impedance switching SW disassembly contact refinement, oxidation and sulfidation prevention grease coating circuit readjusted, input/output waveform confirmed, rated output tested)
Accessories: none
Main specifications: used vacuum tube 50C-A10 x 4 12BH7A x 2 6267 x 1 EF86EH x 1 output 25+25W (4/8/16 ohm switch switching) speaker output 1 system W410 x H160 x D205 mm 13.8 kg
Maintenance was carried out with attention to detail, such as replacing capacitors and replacing SP terminals! A kit model of a power amplifier using a 50CA10 3-pole output tube and an OY15 type output transformer, composed of circuits and parts conforming to the MQ60 type, which has been evaluated by LUXMAN. The sound of a vacuum tube has a sense of volume that seems to meet expectations, and it gently envelops you. Sounds that don't require scale are particularly unique, and the slight thickness that spreads from below the mid-range makes you feel comfortable and relaxed (Sasaki Shota)
Maintenance information: 2025.7.25 Maintained (vacuum tube socket, block capacitor, electrolytic capacitor, oil capacitor, SP and RCA terminals, semi-fixed VR, fuse, spark killer, diode, micro SW replacement. Load tests, input/output waveform checks, and sound output tests are OK. Vacuum tube sockets, block capacitors, electrolytic capacitors, oil capacitors, SP and RCA terminals, semi-fixed VR, fuses, spark killers, diodes, micro SW replacement. Load test, input/output waveform confirmation, load test (1 kHz sine wave, at 8 ohm load: 25W+25W, actual measurement), sound output test OK.)
Accessories: none
Main specifications: 30W+30W 50CA10 push pull W410 x H160 x D205 mm 13.8 kg
In 2024/7, maintenance was carried out with attention to detail, such as capacitor replacement and SP terminal replacement! A kit model of a power amplifier using a 50CA10 3-pole output tube and an OY15 type output transformer, composed of circuits and parts conforming to the MQ60 type, which has been evaluated by LUXMAN. The sound of a vacuum tube has a sense of volume that seems to meet expectations, and it gently envelops you. The sound, which doesn't require scale, is particularly unique, and the slight thickness that spreads from below the mid-range makes you feel comfortable. The exterior has rust, oxidation, and scratches. Serial 574788 (Tomoho Asaine)
Maintenance information: 2024.7.11 Maintained (vacuum tube sockets, block capacitors, electrolytic capacitors, oil capacitors, SP and RCA terminals, semi-fixed VR, fuse holder replacement. Check input/output waveforms and perform sound output checks. Impedance switching SW, gain VOL complete disassembly, contact refinement, and application of grease to prevent oxidation and sulfidation. Input/output waveform confirmation, load test (1 kHz sine wave, at 8 ohm load: 27W+27W, actual measurement), sound output test)
Accessories: none
Main specifications: 30W+30W 50CA10 push pull W410 x H160 x D205 mm 13.8 kg
Vacuum tube sockets, block capacitors, electrolytic capacitors, oil capacitors, SP and RCA terminal replacements, SW and VOL disassembly contact polishing, oxidation and sulfidation prevention grease coating, etc., have been refreshed and maintained. This model is based on the concept of making sounds even more straightforward than the MQ60. The warmth of the tone and the indescribable luster sound are truly lackstones. You can see the exterior, dullness, and feeling of use (Kobayashi Hitoshi)
Maintenance information: 2025.6.28 maintained (impedance switching SW/gain VOL disassembly contact polish, oxidation/sulfidation prevention grease application, input/output waveform confirmation, load test (1kHz sine wave, 8Ω load: 20W+20W confirmation) sound output test) 2025.6.26 maintained (vacuum tube socket, block capacitor, electrolytic capacitor, oil capacitor, SP and RCA terminals, semi-fixed VR, fuse holder replacement. Load test (8Ω load 1kHz 20W+20W), input/output waveform confirmation, sound output check performed)
Accessories: none
Main specifications: used vacuum tube 50CA10 x 4 12BH7A x 2 6267 x 1 EF86EH x 1 output 25+25W (4/8/16 ohm switch switching) speaker output 1 system W410 x H160 x D205 mm 13.8 kg
Maintenance was carried out with attention to detail, such as replacing deteriorated parts and completely disassembling VOL and repolishing contacts! A kit model of a power amplifier using a 50CA10 3-pole output tube and an OY15 type output transformer, composed of circuits and parts conforming to the MQ60 type, which has been evaluated by LUXMAN. The sound of a vacuum tube has a sense of volume that seems to meet expectations, and it gently envelops you. The sound, which doesn't require scale, is particularly unique, and the slight thickness that spreads from below the mid-range makes you feel comfortable. There are scratches and dullness on the exterior due to use over time. Serial 574994 (Tomonori Asaine)
Maintenance information: 2025.1.18 Maintained (impedance switching SW, gain VOL complete disassembly contact refinement, oxidation and sulfidation prevention grease applied. Vacuum tube sockets, block capacitors, electrolytic capacitors, oil capacitors, SP and RCA terminals, semi-fixed VR, fuse holder replacement. Load test (8Ω load 1kHz 30W+30W), input/output waveform confirmation, sound output check performed)
Accessories: none
Main specifications: 30W+30W 50CA10 push pull W410 x H160 x D205 mm 13.8 kg