Because you would be backfeeding one amp's signal into the other's outputs, a treatment for which no amp is designed. Amplifier output signals can be considerable; if you're listening to inefficient, low-impedance speakers really loud, you could see 40-50V and tens of amperes during transients.
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@devinplombier You are correct and that was part of my answer to my great-nephew but it doesn't answer the question as to what might happen and why. Bill |
Bill, backfeeding an amplifier forces it to act as a load rather than a source. Amps are designed to drive current out to low-impedance load, not consume it. The nature and extent of the destruction will vary depending on amp technology and topology, but speaking in general terms you could see anything from no effect at all to thermal overload, fried output transistors, and power supply damage.
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@devinplombier Thanks for the reply. It helps somewhat in answering my question. I realize that there is no cut-and-dried answer. Bill |
There is a cut and dried answer DON'T DO IT! Wasn't @devinplombier explanation clear enough for you or do have learning difficulties or maybe your brain has turned to mush. |
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