Using a double triode vacuum tube push-pull system, it expresses dynamic sound not found in conventional headphone amplifiers that achieve “strength,” “richness,” and “dynamism.” There is a scratch on the front corner. Serial 25100003 (Fujisawa Yukishi)
Maintenance information: 2026.4.11 operation confirmed
Accessories: power cord
Main specifications: output: 650 mW+650 mW vacuum tube used: 12AU7x2 input terminal: RCA1 system headphone terminal: standard jack (front), mini jack (rear) frequency characteristics: 10 Hz to 60 kHz residual noise: 0.1 mV or less W130 x H170 x D230 mm 3.4 kg
It's actually the first time in 15 years that it's been in stock! Maintained by the manufacturer in 2021. Triode mono amplifier incorporating KT88. The soft and thick characteristics of triodes are a perfect match between the realistic sound creation of wasugi. Perfect for classical sound sources, the exterior is good (Kojima Yosuke)
Maintenance information: 2021 manufacturer maintained (single-sided output transformer exterior, sheet metal repair due to damage to chassis mounting part, paint treatment)
2026.4.17 Sound output operation confirmed
Accessories: instruction manual, repair statement
Main specifications: mono power amplifier serial 005/006 output 30W KT88×2, 12AU7, 12AX7A W435×H232 ×D175 mm 24kg/unit
Pair tube direct heat triode tube made in China measured value 64/62 (rejected value 38) with original box*Pairs are determined based on gM values measured by the testing machine TV-7 (Kojima Yosuke)
Accessories: original box
*Set of 2 (not treated as a pair due to the large difference in measured values between 2) Direct Thermal Triode Tubes, American, Measured Value 92/80 (Rejected Value 47) with white box*Measured values indicate GM values measured with the TV-7 testing machine (Kojima Yosuke)
Accessories: white box (with writing)
TRIO retro look trio cartridges. Perfect as an introductory machine. The exterior has a feeling of use over time (Matsumoto Tsuyoshi)
Maintenance information: 2026.4.16 sound output confirmed
Accessories: none
Main specifications: dead weight 6g
Sold as 1 bottle of Parathermal Dual Triodes Made in America LOT: 643? (The end is probably 9) Measured value 42 (rejected value 40) There is an adhesive mark at the junction between the base with the original box and the tube, and it is inexpensive because it makes a crackling sound inside the base*The measured value is determined based on the gM value measured by the testing machine TV-7 (Kojima Yosuke)
Accessories: original box
Direct heat triode tube sold in Canada, JAN square getter, measured value 64 (rejected value 38), there is slight burning inside the tube with the original box ※The measured value shows the gM value measured with the test machine TV-7 (Kojima Yosuke)
Accessories: original box
Pair tube, double triode tube, American black plate, square getter, measured value 108/104 (rejected value 50), with replacement box, all prints have disappeared, so it's cheap ※Pairs are judged based on gM values measured with the test machine TV-7 (Kojima Yosuke)
Accessories: replacement box (with writing)
Sold 1 bottle ECC88 compatible spherical double triode tube, made in the Netherlands, measured value 90 (rejected value 62) with replacement box ※The measured values indicate gM values measured with the test machine TV-7 (Kojima Yosuke)
Accessories: replacement box
Direct thermal triode tube sold in America, made in America, VT-63 compatible ball fishing rod type filament measurement value 86 (rejection value 50) *The measured value indicates the gM value measured with the test machine TV-7 (Kojima Yosuke)
Accessories: none
Direct heat triode smoke, sold per bottle, seems to be an OEM product of tangsol due to its American-made structure. Measured value 68 (rejected value 38) *Measured values are shown with the TV-7 testing machine (Kojima Yosuke)
Accessories: none
Pair tube direct heat triode smoke fishing rod filament, made in America, measured value 68/66 (rejected value 38), there is dirt on the tube with white box*The pair is determined based on the gM value measured with the test machine TV-7 (Kojima Yosuke)
Accessories: white box
Single sale direct heat triode lot: 6526 measured value 32 (rejected value 28) with white box ※The measured values indicate gM values measured with the testing machine TV-7 (Kojima Yosuke)
Accessories: white box
Pair tube ambient heat triode output tube made in Japan Hi-Fi measurement value 70/70 (rejection value 40) There is dirt and writing on the tube with the original box ※The pair is determined based on the gM value measured with the test machine TV-7 (Kojima Yosuke)
Accessories: original box
Pair tube direct heat triode tube made in China measured value 66/66 (rejected value 58) with white box*Pairs are determined based on gM values measured with the test machine TV-7 (Kojima Yosuke)
Accessories: white box
The disposal price has been reduced. Member prices are not applicable. 2026/2/5 sales price 110,000 yen, sold per bottle, 300B equivalent tube, direct heat triode tube, English tea base code: 7420, measured value 64 (rejected value 58) with original box ※The measured value shows the gM value measured with the test machine TV-7 (Kojima Yosuke)
Accessories: original box
Pair tube direct heat triode lot: 113/813 measured value 36/34 (rejected value 28) with white box, both tubes are inexpensive because the getters are thin ※ pairs are judged based on gM values measured with the test machine TV-7 (Kojima Yosuke)
Accessories: white box
Pair tube direct heat triode Sun Valley sorting ball made in China measured value 58/56 (rejection value 38) There is a slight burn on the tube head ※The pair is determined based on the gM value measured with the test machine TV-7 (Kojima Yosuke)
Accessories: none
Sold 1 bottle 45 Special Compatible Ball Direct Heat Triode Fishing Rod Type Filament Engraved Made in America Measured Value 116 (Rejected Value 55) with White Box ※Measured values indicate gM values measured with the TV-7 testing machine (Kojima Yosuke)
Accessories: white box
Pair tube ambient heat triode output tube made in Japan Hi-Fi measurement value 76/72 (rejection value 40) with original box*Pairs are determined based on gM values measured with the test machine TV-7 (Kojima Yosuke)
Direct heat triode sold per bottle, made in Japan, double gettering measurement value 78 (rejected value 58) with original box ※The measured values indicate gM values measured with the testing machine TV-7 (Kojima Yosuke)
Accessories: original box
Pair tube direct heat triode made in America lot: 9107/9109 measured value 68/68 (rejected value 58) with original box, fewer getters on both sides (of which one side decreased drastically), tube burn on the head, and dirt on the tube*Pairs are judged based on gM values measured with the testing machine TV-7 (Kojima Yosuke)
Accessories: original box
Single sale double triode voltage amplifier tube, made in Japan, measured value 68 (rejected value 30) with replacement box ※The measured value shows the gM value measured with the test machine TV-7 (Kojima Yosuke)
Accessories: replacement box
Pair tube direct heat triode brown base black plate measured value 64/60 (rejected value 38) with original box*Pairs are determined based on gM values measured by testing machine TV-7 (Kojima Yosuke)
Accessories: original box
※The condition of the 2 tubes is very different, so they are inexpensive (the structure is the same) Direct Thermal Triode American-made side getter measurement value 60/60 (rejection value 38) There is a burn on the tube head on one side ※The measured value indicates the gM value measured with the test machine TV-7 (Kojima Yosuke)
Accessories: none
※The condition of the 2 tubes is very different, so they are inexpensive (the structure is the same) Direct Thermal Triode American Square Getter Measured Value 64/56 (Rejected Value 38) There is a burn on the tube head on one side, and the getter is thin*The measured values indicate GM values measured with the TV-7 testing machine (Kojima Yosuke)
Accessories: none
Pair tube double triode tube American short base measurement value 104/94 (rejected value 50) with original box*Pairs are determined based on gM values measured with the test machine TV-7 (Kojima Yosuke)
Accessories: original box
Pair tube direct heat triode smoke, made in America, seems to be an OEM product for Canadian Marconi. Measured value 66/64 (rejected value 38) with original box*Pairs are determined based on values measured with the TV-7 testing machine (Kojima Yosuke)
Accessories: original box (the box is damaged)
Pair tube direct heat triode smoke, made in America, seems to be an OEM product for Canadian Marconi, measured value 64/64 (rejected value 38) with original box*Pairs are determined based on values measured with the TV-7 testing machine (Kojima Yosuke)
Accessories: original box (the box is damaged)
Pair tube double triode Russian reprint model measured value 120/120 (rejected value 50) with original box*Pairs are judged based on gM values measured by testing machine TV-7 (Kojima Yosuke)