Who knows this amplifier

Sergelisses · 18th November 2009, 07:41 PM

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

event horizon · 18th November 2009, 07:58 PM

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

bekim · 18th November 2009, 08:21 PM

You have other modules @ ebay similar to that one.

BGR Blazer St Pro 2x 500W RMS Power Amplifier Kit DIY - eBay (item 160376004360 end time Dec-06-09 09:14:14 PST)

18th November 2009, 07:41 PM	#1
Sergelisses diyAudio Member Join Date: Nov 2003 Location: Near PARIS	Who knows this amplifier 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

18th November 2009, 07:58 PM	#2
event horizon diyAudio Member Join Date: Feb 2008 Location: East Midlands, England	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 __________________ "Never let your morals prevent you from doing what is right!" Salvor Hardin

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18th November 2009, 08:21 PM	#3
bekim diyAudio Member Join Date: Jul 2004 Location: Prishtina, Kosova	You have other modules @ ebay similar to that one. BGR Blazer St Pro 2x 500W RMS Power Amplifier Kit DIY - eBay (item 160376004360 end time Dec-06-09 09:14:14 PST)

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