※Shipping service. Special Feature = Phono Equalizer Audition Report Part 2/World Speaker Brand Research Part 2/Diatone DS-MA1/Yufuin “Listen to Western 16A at Sanso Muryoto!” /Type Separate Tube Amp Research Compact Pre-Main/Analog Prestige Brand Research “DYNAVECTOR” /Record Needle Repair/Continued · Send Ale to Zonotone/ H19.10.20 Issued/Published Model: EQS MK 12/C-2410 AD-2800/New MP Series/IO-M/HCTR01/L-505U/G1302/PL300 PL300 PL100/PHONO-ONE/RIAA-22 MK-2/EA-3/EQA-777/TR-EQ1/EAR 834P-5/symphonic/xono/AS-3.8i/RA-VT11/Nimis RC/TUBE 53/.
The photograph is a sample, so the actual product may be broken, or there may be markings etc.
It hasn't been in stock in a long time! Accuphase Premium Cartridges Using a sapphire tube cantilever, the sound is straightforward with no specific sound, almost no distortion, and a perfect sense of range. Now it's a manufacturer that pushes ahead with the cutting edge of digital audio, but it's a cartridge where you can once again feel the high level of analog audio technology (Yamato Yuki)
Maintenance information: 2024.5.31 operation confirmed
Accessories: The original box needle cover is missing
Main specifications: MC type output voltage 0.18 mV needle pressure 1.5 to 2.5 g optimal 2 g impedance 4 ohms line contact needle
The A3500 vacuum tube power amplifier has been refreshed by thorough maintenance down to the smallest details, such as volume disassembly and polishing. The warm, fresh tone, filled with the appeal of a vacuum tube type, is still appealing enough today. You can enjoy music with a rich, thick tone that contrasts with the clicking tones of recent vacuum tube amplifiers. As for the exterior, paint deterioration and peeling can be seen on the transformer on one side, and there is a feeling of use such as dullness, small scratches, etc., and there is a dent in the hood. ※3-pole tube connection specification. 20W+20W (actual measurement) is output as specified by the manufacturer (Takasaki Atsushi)
Maintenance information: 2023.2.3 maintained (main tube (6CA7) replacement vacuum tube socket, block capacitor, electrolytic capacitor, oil capacitor, SP and RCA terminals, complete disassembly of semi-fixed VR replacement power input gain volume, contact polishing, anti-oxidation/sulfation grease coating load test (8Ω load 1kHz 20W+20W) input/output waveform confirmation sound output check performed)
Accessories: copy of the manual
Main specifications: 20W+20W (8Ω) vacuum tube 6CA7×4/6AQ8×3 W465×H168×D206mm 16kg
The A2500 is a tube type power amplifier kit that has been replaced with speaker terminals that are easy to use even for beginners. 6AQ8 for the first stage and 12AU7 for the phase reversal stage both use triodes. Since triodes are used across all stages, the sound is taut and bright, with excellent nude characteristics. The exterior has dullness over time, rust, and small scratches. Serial 560561 (Miura Kimiya)
Maintenance information: 2018.4.28 Maintained (printed circuit board resistor replaced. (Adjustment characteristics check OK) 2014.11.21 maintenance completed (input VR, vacuum tube socket, coupling capacitor, SP terminal, BIAS DC BAL, semi-VR, each deterioration exchange, adjustment, characteristic check OK)
Accessories: instruction manual
Main specifications: 6 RA8 push-pull 6 RA8 x 4/12 AU7 x 2/6AQ8 10W+10W W410 x H145 (with hood) x D190 mm 9.6 kg
Pair tube large triode tube made in America Actual measured Ip value: 70mA/70mA (the best standard IP value for this amplifier is 75mA) The inside of the tube with the original box is slightly burnt, and there is dirt adhering to the outside of the tube*Sound is checked with a test amplifier, and the plate current value has been measured, and it has been determined that the operation is good (Kojima Yosuke)
Accessories: original box
Pair tube, large triode tube, made in America, measured Ip value: 71 mA/71 mA (the best standard IP value for this amplifier is 75 mA) with original box*Sound is checked and plate current values are measured with a test amplifier, and it has been determined that operation is good (Kojima Yosuke)
Accessories: original box
1 sold in USA JAN tea base measurement 90 (rejection value 48) with original box ※ Measured value is gm value measured with tv-7 test machine (Yosuke Kojima)
Accessories: original box
Pair tube, 6L6GC compatible ball, high reliability tube, made in America lot: 8526/8526 measured value 44/42 (rejected value 25) with replacement box ※ pair is determined based on GM values measured with test machine TV-7 (Kojima Yosuke)
Accessories: replacement box
Pair tube 6BQ5 high reliability tube made in Japan measured value 72/68 (rejection value 46) *Pairs are determined based on GM values measured with the TV-7 test machine (Kojima Yosuke)
Accessories: none
Pair tube made in the USA side getter measurement value 62/58 (critical value 30) with JAN original box ※ The pair is determined based on GM value measured by the tester TV-7 (Yosuke Kojima)
Accessories: original box
Pair tube smoke made in Canada JAN measured value 86/76 (rejected value 46) with original box*Pairs are judged based on gM values measured by testing machine TV-7 (Kojima Yosuke)
Accessories: original box
Pair tube double triode tube, made in America, JAN measurement value 80/76 (rejected value 32) *Pairs are determined based on gM values measured with the test machine TV-7 (Kojima Yosuke)
Accessories: white box
Pair tube double triode tube, made in America, JAN measurement value 74/72 (rejected value 32) *Pairs are determined based on gM values measured with the test machine TV-7 (Kojima Yosuke)
Accessories: white box