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Using 8 Ohm speakers in place of 4 Ohm speakers? - Page 2

post #11 of 13
More than likely, the larger size 8ohm speakers, will actually result in the system sounding better and being able to play louder and cleaner all around with less stress to the amp.

The reason being that the little satellites that probably came with the system probably suffer from relatively poor efficiency. Larger speakers are generally more efficient, so you get more sound energy for less watts. Switching to an 8 ohm speaker (from a 4 ohm) does theoretically cut the maximum power you can deliver to the speakers from that amp, roughly, in half. However, half power is just a 3db loss. More than likely, the larger speakers are ~3db more efficient, or better. More importantly, the amp is probably garbage to begin with, anything you can do to reduce the "load" on the amp for a given listening level should result in cleaner amplification (less distortion).

Enjoy,
Eric
     
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post #12 of 13
You only have to worry about using a speaker with a lower impedance(ohm) than what the amp/receiver/etc is rated.
APU what?
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post #13 of 13
Almost everybody above has it right on the money.

If you want to make things even easier on yourself, find a pair of car audio speakers, and throw them in an enclosure, and I'll bet that would still sound better than the speakers it came with honestly. Most car speakers (speakers not subs) are 4ohms. SOME are 2ohm, some are 8ohm, but most are 4ohm for cars. So you COULD get full power if you used 4ohm speakers (such as car speakers).

However, that little teeny tiny amplifier (built into the "subwoofer") probably won't power a whole heck of a lot anyway.

Try what you've got, see if it sounds any better. If it doesn't, I'd say its time to invest in a real amplifier for your 8ohm speakers, or a receiver for them. smile.gif

But no, you will NOT HARM ANYTHING by using 8ohm speakers on a 4ohm amplifier. Going into higher resistances is EASIER on the amplifier, because it produces less power. Going lower (as previously stated), is what will be harder on an amplifier. You could TECHNICALLY run 16ohm speakers just fine off that 4ohm amp. You'll just get 1/4 of the power out of it.
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