4Ohm Speakers 8 Ohm Amp
Arny Krueger wrote:
These days, good amps always have appropriate protection built-in. Not only
can good modern amps rated at 8 ohms drive 4 ohm speakers without failing,
they can drive 0-ohm shorted speaker leads without failing.
Most amps that are rated at 8 ohms are rated at 8 ohms so that they can
survive continuous-since wave signal testing on the bench. In practical use
the mostly likely problem would be overheating, but that is improbable
unless you are pushing the @!$##!! out of them.
My surround-sound receiver (used only for movies, but sharing, via
cable-swap, my main, 4-ohm, music-system speakers) is a Pioneer Elite
rated down to 6 ohms. It usually works fine, but intense soundtracks
have caused it to self-protect.
It helps that I have my surround setup as "main speakers are small"
(even though they're not 8), so my poor Pioneer doesn't have to do
the low notes. I also raised the X-over freq to 100 Hz, instead of
the 80Hz default.
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