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Old 30th June 2009, 10:56 AM   #61
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Bleeder resistors are put one on each power supply rail, near the large capacitors. The purpose is to discharge the capacitors when power is removed, and there is no sonic purpose. Some people use them some don't. They increase (slightly) power dissipation, but increase (slightly) safety. The will not make much difference in how quick the amp turns off though.
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Old 30th June 2009, 03:18 PM   #62
AndrewT is offline AndrewT  Scotland
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They increase the draw on the Power Supply.
This increases the ripple on the PSU output.
A low bias ClassAB amplifier may suffer from increased 100Hz hum.
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