HITACHI HMA8500 mkII Power MOS FET Dual mono amplifier. The amp is in very good working condition. Some cosmetic traces of use as seen on photos220V. Standard IEC power inlet. Power cord is not included.

HITACHI HMA8500 mkII Power MOS FET Dual mono amplifier. The amp is in very good working condition. Some cosmetic traces of use as seen on photos220V. Standard IEC power inlet. Power cord is not included.

Hitachi HMA-8500 Mk II rated 100 watts per channel into 8?, 35.2 lbs./16 kg A classic vintage MOSFET class AB stereo power amplifier with extremely low distortion. 20~20,000 Hz at 0.005% THD or 1 kHz at 4? or 8? at 0.005% THD. Its a real dual-mono deign. It even has two power transformers as well as two sets of power supply rectifiers and capacitors. Each transformer has its own input voltage selector! Ive owned them for over 10 yrs. They work great. The caps are original and as far as I know never replaced. Sometimes the VU meter on one wants to stick and unstick. Doesnt all the time. The sound is audiophilic. I have used them in mono form and that is the best. MOSFET sounds natural and I like it more than solid state. This is a very rare amp and its hard finding just one now but here is two! For audiophiles as me they are one of the best vintage amps you can get your hands on. They are a little dusty but in excellent cosmetic shape almost perfect. The white marks are dust and not a cosmetic damage at all. They look dark in their natural new state. I should have wiped it off for the pics. Shipping is flat rate to the US and Canada excluding Alaska, Hawaii. Europe rates please inquire. Theyre super heavy. Will be packaged well.

HITACHI HMA8500 mkII Power MOS FET Dual mono amplifier. The amp is in very good working condition. Some cosmetic traces of use as seen on photos220V. Standard IEC power inlet. Power cord is not included. Output Power Stereo 100 watts per channel. 20~20,000 Hz at 0.005% THD or 1 kHz at 4? or 8? at 0.005% THD. 130 WPC at 0.5% IEC. 150 W 8? dynamic power Mono (one channel only) 200 watts into 8?. Power Bandwidth 5 ~ 100,000 Hz at 50 watts at 0.05% THD. Audio Input Two stereo pairs of 1/4 RCA jacks. One is DC coupled, the other AC coupled through an 0.68 µF capacitor. 47 k?. 1 V RMS. SMPTE Intermodulation Distortion 0.005% at 50 W. Frequency Response into 8? 0.5 ~ 100,000 Hz +0, -1 dB. Crosstalk > 75 dB at 20 Hz. > 85 dB at 1 kHz. > 65 dB at 20 kHz. Signal to Noise Ratio 118 dB A-weighted, referred to 100 watts. This means < -82.2 dBW or < 219 µV or < -73.2 dBV noise output. Damping Factor 60 into 8?, 20~20,000 Hz. Power Input 120, 220 or 240 VAC, 50-60 Hz. Rated 260 W at 10 WPC, 450W/550 VA at 33-1/3 WPC, 750W at 100 WPC. Made in Japan. Size 165 x 435 x 320 mm HWD. Weight 16 kg

HITACHI HMA8500 mkII Power MOS FET Dual mono amplifier. The amp is in very good working condition. Some cosmetic traces of use as seen on photos220V. Standard IEC power inlet. Power cord is not included. Output Power Stereo 100 watts per channel. 20~20,000 Hz at 0.005% THD or 1 kHz at 4? or 8? at 0.005% THD. 130 WPC at 0.5% IEC. 150 W 8? dynamic power Mono (one channel only) 200 watts into 8?. Power Bandwidth 5 ~ 100,000 Hz at 50 watts at 0.05% THD. Audio Input Two stereo pairs of 1/4 RCA jacks. One is DC coupled, the other AC coupled through an 0.68 µF capacitor. 47 k?. 1 V RMS. SMPTE Intermodulation Distortion 0.005% at 50 W. Frequency Response into 8? 0.5 ~ 100,000 Hz +0, -1 dB. Crosstalk > 75 dB at 20 Hz. > 85 dB at 1 kHz. > 65 dB at 20 kHz. Signal to Noise Ratio 118 dB A-weighted, referred to 100 watts. This means < -82.2 dBW or < 219 µV or < -73.2 dBV noise output. Damping Factor 60 into 8?, 20~20,000 Hz. Power Input 120, 220 or 240 VAC, 50-60 Hz. Rated 260 W at 10 WPC, 450W/550 VA at 33-1/3 WPC, 750W at 100 WPC. Made in Japan. Size 165 x 435 x 320 mm HWD. Weight 16 kg

THESE MUTHAS ROCK! I have to fix my truck or I would keep them. I have them hooked up to my Yamaha home theater. My Yamaha receiver is a 9.2 with plenty of power but Im a drummer so my hearing has some challenges and these have been a blessing with the dial hardly turned up. They even have the original Japanese plug ends on them with US adapters. Ive taken good care of them and the kids have NEVER had their sticky hands anywhere near them. They are sweeeet! Thank you!

HITACHI HMA8500 mkII Power MOS FET Dual mono amplifier. The amp is in very good working condition. Some cosmetic traces of use as seen on photos220V. Standard IEC power inlet. Power cord is not included. Output Power Stereo 100 watts per channel. 20~20,000 Hz at 0.005% THD or 1 kHz at 4? or 8? at 0.005% THD. 130 WPC at 0.5% IEC. 150 W 8? dynamic power Mono (one channel only) 200 watts into 8?. Power Bandwidth 5 ~ 100,000 Hz at 50 watts at 0.05% THD. Audio Input Two stereo pairs of 1/4 RCA jacks. One is DC coupled, the other AC coupled through an 0.68 µF capacitor. 47 k?. 1 V RMS. SMPTE Intermodulation Distortion 0.005% at 50 W. Frequency Response into 8? 0.5 ~ 100,000 Hz +0, -1 dB. Crosstalk > 75 dB at 20 Hz. > 85 dB at 1 kHz. > 65 dB at 20 kHz. Signal to Noise Ratio 118 dB A-weighted, referred to 100 watts. This means < -82.2 dBW or < 219 µV or < -73.2 dBV noise output. Damping Factor 60 into 8?, 20~20,000 Hz. Power Input 120, 220 or 240 VAC, 50-60 Hz. Rated 260 W at 10 WPC, 450W/550 VA at 33-1/3 WPC, 750W at 100 WPC. Made in Japan. Size 165 x 435 x 320 mm HWD. Weight 16 kg

HITACHI HMA8500 mkII Power MOS FET Dual mono amplifier. The amp is in very good working condition. Some cosmetic traces of use as seen on photos220V. Standard IEC power inlet. Power cord is not included. Output Power Stereo 100 watts per channel. 20~20,000 Hz at 0.005% THD or 1 kHz at 4? or 8? at 0.005% THD. 130 WPC at 0.5% IEC. 150 W 8? dynamic power Mono (one channel only) 200 watts into 8?. Power Bandwidth 5 ~ 100,000 Hz at 50 watts at 0.05% THD. Audio Input Two stereo pairs of 1/4 RCA jacks. One is DC coupled, the other AC coupled through an 0.68 µF capacitor. 47 k?. 1 V RMS. SMPTE Intermodulation Distortion 0.005% at 50 W. Frequency Response into 8? 0.5 ~ 100,000 Hz +0, -1 dB. Crosstalk > 75 dB at 20 Hz. > 85 dB at 1 kHz. > 65 dB at 20 kHz. Signal to Noise Ratio 118 dB A-weighted, referred to 100 watts. This means < -82.2 dBW or < 219 µV or < -73.2 dBV noise output. Damping Factor 60 into 8?, 20~20,000 Hz. Power Input 120, 220 or 240 VAC, 50-60 Hz. Rated 260 W at 10 WPC, 450W/550 VA at 33-1/3 WPC, 750W at 100 WPC. Made in Japan. Size 165 x 435 x 320 mm HWD. Weight 16 kg

HITACHI HMA8500 mkII Power MOS FET Dual mono amplifier. The amp is in very good working condition. Some cosmetic traces of use as seen on photos220V. Standard IEC power inlet. Power cord is not included. Output Power Stereo 100 watts per channel. 20~20,000 Hz at 0.005% THD or 1 kHz at 4? or 8? at 0.005% THD. 130 WPC at 0.5% IEC. 150 W 8? dynamic power Mono (one channel only) 200 watts into 8?. Power Bandwidth 5 ~ 100,000 Hz at 50 watts at 0.05% THD. Audio Input Two stereo pairs of 1/4 RCA jacks. One is DC coupled, the other AC coupled through an 0.68 µF capacitor. 47 k?. 1 V RMS. SMPTE Intermodulation Distortion 0.005% at 50 W. Frequency Response into 8? 0.5 ~ 100,000 Hz +0, -1 dB. Crosstalk > 75 dB at 20 Hz. > 85 dB at 1 kHz. > 65 dB at 20 kHz. Signal to Noise Ratio 118 dB A-weighted, referred to 100 watts. This means < -82.2 dBW or < 219 µV or < -73.2 dBV noise output. Damping Factor 60 into 8?, 20~20,000 Hz. Power Input 120, 220 or 240 VAC, 50-60 Hz. Rated 260 W at 10 WPC, 450W/550 VA at 33-1/3 WPC, 750W at 100 WPC. Made in Japan. Size 165 x 435 x 320 mm HWD. Weight 16 kg

Vintage Hitachi HMA 8500 MKII Class AB Mosfet Stereo Amplifier. Im the original owner and the unit works flawlessly . The amp is very powerful and very clean sounding. In lower volumes it runs in Class A mode. Large VU meters still function just fine. This is a 120V unit. Stereo100 watts per channel.20~20,000 Hz at 0.005% THD or1 kHz at 4? or 8? at 0.005% THD.130 WPC at 0.5% IEC.150 W 8? dynamic power Mono (one channel only)200 watts into 8?. Power Bandwidth5 ~ 100,000 Hz at 50 watts at 0.05% THD. Audio InputTwo stereo pairs of 1/4 RCA jacks.One is DC coupled, the other AC coupled through an 0.68 µF capacitor.47 k?.1 V RMS. SMPTE Intermodulation Distortion0.005% at 50 W.The Hitachi HMA-8500 Mk II is a high quality 100 watts-per-channel MOSFET class AB stereo power amplifier. MOSFETs are solid-state devices that work on principals more similar to vacuum tubes than bipolar transistors — and it sounds great!Its a real dual-mono deign. It even has two power transformers as well as two sets of power supply rectifiers and capacitors. Circuit DesignIts a traditional class AB linear power amplifier in a perforated sheet metal steel case.It runs hot; its biased for class A most of the time. Hitachi discovered a source of distortion was varying capacitance of the output devices near turn-off, so by biasing them more towards class A they eliminated this extra source of distortionThe power rails run at ± 58 VDC.There are two 6800 µF 63 VDC caps and one 1 µF 250v Mylar per rail per channel, total 12 caps and power supply four rails (each channel has independent supplies).There are two pairs of 2SK134 and 2SJ49 in parallel for each channel.The meters are fed from the headphone feed. The headphones are fed from the speaker rails (before the speaker relays) through 333-1/3 ohm series resistors.The protection relay comes before the headphone takeoff. The protection relay waits 5-10 seconds at turn-on, and also trips if there is too mu DC at the outputs.The meters use a semi-peak half wave detector and drive the needles which have VU ballistics. I do not offer returns due to high cost of shipping back and for , the risk of damage. This unit works flawlessly. You would be impressed with the sound quality of this unit.

HITACHI HMA8500 mkII Power MOS FET Dual mono amplifier. The amp is in very good working condition. Some cosmetic traces of use as seen on photos220V. Standard IEC power inlet. Power cord is not included.