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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: You can put a 40 ohm 200W resistor... posted by Gepetto on May 8, 2002 at 15:11:38:
The B+ in a DH500 is 93V. With a 40R resistor pulled to either rail the available power in class A will be 22W at 8R per channel. The heatsink module will have to dissipate 432W and the external resistors 216W each. My DH500 with stock bias overheated and shut off driving a 4R load in class AB. A class AB amp is 78.5% efficent plus the idle current loss. The idle current loss in a stock DH500 is 130W. At 400W/4R X 2 at 78.5% efficency plus 130W idle that is about 320W, and the heatsink and fan couldn't handle that load. The DH500 can be converted to a high power class A amplifier, but it involves changing the power transformer.
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Follow Ups
- 432W - djk 23:57:12 05/08/02 (2)
- Re: 432W - topogon 05:49:49 05/09/02 (1)
- Or Krells or some old Sony ES ones... - Gepetto 06:56:29 05/11/02 (0)
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