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Old 26th May 2003, 04:03 PM   #1
palesha is offline palesha  India
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Join Date: Nov 2001
Location: Pune India
Default LM 3886 gainclone & mute

I wish to use LM 3886 as gainclone. What about the ontimedelay/mute circuit? Is it ok to use mute circuit or not? Any other suggestion for making 50W/4ohm subamp with LM 3886 welcome.
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Old 27th May 2003, 09:11 AM   #2
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Join Date: Dec 2001
Location: Perth, Western Australia
my only comment/suggestion is to make sure you calculate your supply rail voltages (Vs) correctly - these chips aren't so crash hot at 4 ohm loads, at least in terms of power gain vs. heat. you get about 50W with 8 ohms with a +/-35v supply but (i think) you can get maybe 65W into 4 ohms. you are better off reducing the Vs to give you 50W output into 4 ohms. and due to the heat, try to get the ones that aren't totally encapsulated (i.e. the plastic cover comes between the backplate of the chip and heatsink).
"There's no greater sign of genius than the scorn of fools"
-Albert Einstein.
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