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Permalink Reply by Joe Williams on May 25, 2018 at 11:58am

Also, how do I compare one of those circuits with one of these?

https://www.ebay.com/itm/LM386-Super-Mini-Amplifier-Board-Power-Amp...

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Permalink Reply by Joe Williams on May 25, 2018 at 1:28pm

It does, thanks.

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Permalink Reply by Timothy Hunter on May 26, 2018 at 6:24am

according to the LM386 datasheet it can drive a load from 4 to 32 ohms. so either way would work. you will get more power with the 4 ohm load .

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Permalink Reply by Paul Craig on May 26, 2018 at 8:36am

Those little amps will handle 4ohm, 8ohm or 16 ohm well. If the amp has 2 channels, then wire them straight into each channel, if one channel then wire them in parallel  for a 4ohm load. Don't do the series, the amp might handle it, but the speakers would rag out quick in my opinion.

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Permalink Reply by Timothy Hunter on May 26, 2018 at 5:48pm

what do you mean "rag out "? in series the speakers will only pass half the current and will be under driven

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Permalink Reply by Paul Craig on May 27, 2018 at 8:23am

2 - 8ohm speakers in parallel will simulate a 4ohm load. 2 - 8ohm speakers in series will double the ohm rating to 16ohms and the amp will handle it.

The speakers from the TV will be fine for their ohm rated output or less, but doubling their ohm output will damage the speaker coils(rag out) after a short time. Causing them to distort at all levels of volume and generally sound like arse. 

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Permalink Reply by Paul Craig on May 27, 2018 at 8:25am

2 - 8ohm speakers in parallel will simulate a 4ohm load. 2 - 8ohm speakers in series will double the ohm rating to 16ohms and the amp will handle it.

The speakers from the TV will be fine for their ohm rated output or less, but doubling their ohm output will damage the speaker coils(rag out) after a short time. Causing them to distort at all levels of volume and generally sound like arse. 

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