There is no problem with the operation, but it will be handed over as is. Yamaha subwoofer. You can easily enjoy powerful sound. The high-cut filter allows you to listen in the desired range, so the range of uses also expands. The exterior has a slightly raised part on the top plate, and there is a scratch on the back corner (Mizusaki Ryo)
Maintenance information: 2024.5.9 sound output confirmed
Accessories: none
Main specifications: A-YST method anti-magnetic amplifier output 250W playback frequency band 20Hz to 160Hz high-cut filter frequency 40Hz to 140Hz continuously variable W340 x H432 x D370 mm 17 kg
Maintained by the manufacturer! Yamaha's pre-main amplifier equipped with a floating and balanced amplification power amplifier using a MOS FET. A screw fastening system is used for the connection, and thorough consideration has been given to low impedance. Equipped with a phono equalizer with MC head amplifier. The smoothness and strength of the sound are perfectly balanced, and no source is selected from records to high-resolution sound sources. The appearance is good, with a slight dullness. There are a lot of scratches on the remote control (Kobayashi Hitoshi)
Maintenance information: 2024.5.21 Maintained (replacement of power supply related resistors, etc. in the main board and INPUT board. Operation check confirmation)
Accessories: remote control, instruction manual, power cord
Main specifications: output 90W+90W (8Ω) 150W+150W (4Ω) input 7 systems (phono MM/MC) dimensions W435 x H157 x D463 mm weight 23.4 kg
Speaker cable, 2.5 m pair, SOS3+ single connection, Y lug specification on both ends, standard model of the company's speaker cable. There is little dramatization, and the sound is light (Kojima Yosuke)
Accessories: none
Pair tube, subthermal beam tube, made in China, seems to have been used in the company's power amplifiers, etc. Measured value 64/64 (rejected value 44) with replacement box*Pairs are determined based on gM values measured by the testing machine TV-7 (Kojima Yosuke)
Accessories: replacement box
Power supply/heater transformer primary: 105-115-125V secondary: 6.3V/1.0A, 5.0V/4.0A, 6.3V/4.0A W85 × H110 × D100mm 2.9 kg (actual measurement, protrusions included First of all) it seems to be an unused item from the state of the terminal! (Kojima Yosuke)
Accessories: none
Power supply/heater transformer primary: 105-115-125V secondary: 6.3V/1.0A, 5.0V/4.0A, 6.3V/4.0A W85 × H110 × D100mm 2.9 kg (actual measurement, protrusions included First of all) it seems to be an unused item from the state of the terminal! (Kojima Yosuke)
Accessories: none
Sold per bottle, general purpose amplifier tube, top mark, JAN, made in America, measured value 38 (rejected value 28), with replacement box (the lid of the box is missing) *The measured values are values measured with the test machine TV-7 (Kojima Yosuke)
Accessories: replacement box
A set of 2 seems to be a choke transformer, but the details are unknown. Measured DC resistance value 380/373Ω W31H95 x 44mm 0.31 kg/piece (actual measurement, not including protrusions), only conduction and resistance values have been confirmed by a tester (Kojima Yosuke)
Accessories: none
Input transformer sold 1 piece primary: 10KΩ secondary: 60 kΩ boost ratio 1:2.5 W24 x H35 mm 0.06 kg/piece (actual measurement, not including protrusions) (Kojima Yosuke)
Accessories: none
Input transparent sale primary: 10 KΩ secondary: 60 kΩ boost ratio 1:2.5 W 24 x H35 mm 60 g/piece (actual measurement, not including protrusions) with white box (Kojima Yosuke)
Accessories: white box
The price has been drastically reduced. 2024/1/15 sales price 118,000 yen pair tube 45 special compatible ball straight heat triode fishing rod type filament made in America measurement value 90/86 (rejected value 55) with white box*Pairs are determined based on gM values measured by testing machine TV-7 (Kojima Yosuke)
Accessories: white box
1 bottle of side-heat beam tube, made in France, smoke measurement value 42 (rejection value 25), replacement box included, printing is missing ※ the measured value shows the GM value measured with the test machine TV-7 (Kojima Yosuke)
Accessories: replacement box
* There is no remote control, and there is no problem with the current operation, but since it is inexpensive, it is a CD player equipped with a K2 interface circuit, has plenty of functions, and is also attractive in terms of ease of use. It eliminates digital distortion caused by jitter (time difference distortion), ripple (waveform distortion), etc. There are threads and small scratches on the exterior, and deterioration can be seen on the inside of the tray (Kojima Yosuke)
Accessories: copy of the manual
Main specifications: W435 x H115 x D375 mm 9.3 kg
The price has been reduced. 2017/10/6 sales price 3,000 yen This is a speaker mounting bracket when using the speaker system PS-S200 series etc. as a ceiling suspension. There are spots, rust, and small scratches on the exterior. One single-sided pin is missing (Wang Exhibition)
Accessories: none
Main specifications: compatible models PS-S224W/WH, PS-S226W, PS-S203W, PS-S204W, PS-S207W,
PS-S550W, PS-S552W, PS-S553, etc. Load capacity 12 kg, angle adjustable 1.13 kg
Maintained! A power amplifier using the AB/LR independent power supply system, which is a further development of the A class B class 2 independent power supply system. Contrary to its solid appearance, it has a beautiful sound with a sense of transparency. The sound quality is moderately tight and firm, and it naturally handles crisp and energetic intonation expressions. The exterior has small scratches and dullness appropriate for the model year (Oikawa Tetsuji)
Maintenance information: 2024.5.12 Maintained (replacement of defective output relay contacts. (Replace deteriorated capacitors in power supply circuits and other circuits)
Accessories: none
Main specifications: 100W+100W (8Ω) compatible speakers 4Ω to 16Ω SNR 110dB W420 x H166.5 x D300 mm 19.2 kg
2.6 m speaker cable sold per cable, 98 SCMC-OFC conductors, parallel multiple stranded wire type that uses 1 pair of strands, has relatively good treble range extension in the company's speaker cable lineup, and it is a cable that matches well with the overall softness of the sound (Kojima Yosuke)
Accessories: none
Pair tube 45 Special/38142 compatible ball, direct heat triode, fishing rod type, filament measurement value 120/118 (rejection value 55) with original box ※ The pair was determined based on the GM value measured by the testing machine TV-7 (Kojima Yosuke)
Accessories: original box
Pair tube 6CA7 compatible sphere Russian reprint model measurement value 52/48 (rejection value 30) white box with getter burn ※The pair is determined based on the GM value measured with the test machine TV-7 (Kojima Yosuke)
Accessories: white box
Pair tube 6CA7 compatible sphere Russian reprint model measurement value 46/42 (rejection value 30) white box with getter burn ※The pair is determined based on the GM value measured with the test machine TV-7 (Kojima Yosuke)
Accessories: white box
Pair tube, ambient heat beam tube, 5881 equivalent tube, made in America, JAN brown base measurement value 42/42 (rejected value 25) with white box ※Pairs are determined based on gM values measured with the test machine TV-7 (Kojima Yosuke)
Accessories: white box
Pair tube metal brown base Russian dharma tube measured value 60/58 (rejected value 44) with white box, printing on one side often disappears ※Pairs are determined based on gM values measured with the test machine TV-7 (Kojima Yosuke)
Accessories: original box
Heater transformer spare sale primary: 105-115-125V secondary: 6.3V/5A (with CT) W49 × H69 × D45 mm 0.5 kg/piece (actual measurement, not including protrusions) with original box exterior, terminals It seems to be an unused item from the condition! (Kojima Yosuke)
Accessories: original box
Pair tube ambient heat beam tube made in Japan Hi-Fi measurement value 46/44 (rejection value 25) with original box (inner box/outer box) *Pairs are determined based on gM values measured by the testing machine TV-7 (Kojima Yosuke)
Accessories: original box (inner box/outer box)
Pair tube triode for Hi-Fi made in Japan*Pairs are determined based on EM values measured with the test machine EM-604 (Yosuke Kojima)
Accessories: none