AVS Forum Special Member
Join Date: Nov 2003
Location: Derwood, Maryland
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I have many 4 ohm speakers and I generally ignore the impedance when buying speakers. No matter what system you have, if you play it too loud, you can fry your equipment if it gets too hot. It's true with 8 ohm as well as 4 ohm speakers. I buy receivers/amps that can supply way more power than I would ever need, so I don't worry about impedance.
Also, the impedance values are garbage. You can't give a single figure for impedance since it varies with frequency. That's why the numbers are broadly rounded like 4, 6 and 8 instead of 6.73.
I do think 4 ohm speakers are generally better than 8 ohm. It has nothing to do with the impedance. I've found that many manufacturers blindly put a 8 ohm value on their speakers. Those with 4 ohm ratings took the time to actually measure it and those manufacturers also tend to take the time to produce a decent product.