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Old 6th July 2006, 12:34 AM   #1
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Default Modifying 200W gainclone circuit

I'm trying to modify the following circuit to work with a single, non bridged LM3886.

A lot of parts appear unneccesary, like the 2.2k resistors between power supplies, cap/resistor across driver, etc.

And since each side isn't identical, so I'm not exactly sure where to start removing comonents.

What can I remove from this circuit to use it with a single LM3886 with a pair of MJ15003/MJ15004 transistors. I'm looking for power over quality here, it's going to be driving a horn subwoofer so although sound quality is important, power output is even more important.

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Old 6th July 2006, 01:38 AM   #2
lndm is offline lndm  Australia
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The 2k2's across the supply appear to be creating a ground reference. The cap and resistor across the driver are there for stability, a speakers load typically rises beyond the spectrum. I'd leave those there.
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Old 6th July 2006, 01:48 AM   #3
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But the 3886 requires split supply so a physical ground is there anyway. Or do you mean something else?
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Old 6th July 2006, 01:58 AM   #4
lndm is offline lndm  Australia
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The schematic showed a non centre tapped supply. Of course you'll want to add one
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