Specification :
1. Mono, stereo system needs 2pcs of PA module,
2. Output power : Max 1000W RMS into 4 Ohm, Max 800W RMS into 8 Ohm,
3. Input sensitivity : 1.2V for 300W into 4 Ohm,
4. Harmonic distortion : 0.06% from 20Hz to 20KHz,
5. Frequency response : 17Hz - 56KHz at 0dB -3dB,
6. Supply input (DC) : 70V-0-70V (12A),
7. Using high quality BJT 5x 2SA1295 and 5x 2SC3264 from SANKEN,
8. high quality components (transistor, capacitor, resistor, relay, and etc.),
9. one by one tested,
10. heat spreader,
11. PCB 10x40cm2,
12. builtin turn-on delay and loudspeaker protection (DC servo),
Hello
Who knows this amplifier ?
Serge
I can't see how it could output 800W RMS in 8ohms with a +/-70V supply 
It's obviously not a bridged amplifier with 5 NPN & PNP output transistors.
I think more like 250W RMS would be realistic with well regulated rails, if you used 2 modules bridged then yes, you might well see 800W RMS int 8 ohm.
70/1.414 = 49.5V, 49.5 squared = 2450/8 ohm = 306W but that's not taking into account any component losses at all
250W into 8ohm is far more realistic
It's obviously not a bridged amplifier with 5 NPN & PNP output transistors.I think more like 250W RMS would be realistic with well regulated rails, if you used 2 modules bridged then yes, you might well see 800W RMS int 8 ohm.
70/1.414 = 49.5V, 49.5 squared = 2450/8 ohm = 306W but that's not taking into account any component losses at all
250W into 8ohm is far more realistic
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