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Old 8th February 2013, 06:10 PM   #1
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Default On speaker protection

Hi all,

I'm about to build an LM 3886 stereo amp using the chipamp.com amp and power supply boards. (I got a good deal on ebay) I'd like to have some kind of speaker protection for my old 8 ohm KLH Model 17s. I've read about speaker protection circuits, large caps in series w/ the output (do they need to be non-polarized?), fuses on the power supply rails. How about fuses on the outputs themselves, or circuit breakers? What value and would that be fast enough?

I would value simplicity over ultimate protection. These speakers aren't that rare, etc.

Keith
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Old 8th February 2013, 06:25 PM   #2
JMFahey is offline JMFahey  Argentina
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Use the Triac crowbar circuit favored by Peavey and a ton other Pro PA sound equipment makers.
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Old 9th February 2013, 01:04 AM   #3
djoffe is offline djoffe  United States
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assuming you don't listen at crazy high levels, a 1A slow blow fuse isn't a bad solution. There are some problems with it, but it's simple, and may do the job for you.
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Old 9th February 2013, 01:47 AM   #4
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Default speaker protection

Hello
greetings can this circuit work for speaker protection
warm regards
andrew lebon
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