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In Reply to: Re: Ohms? posted by Don Bunce on April 1, 2007 at 22:28:22:
Speakers are reactive devices where the impedance magnitude and phase varies with frequency.Putting a 4 Ohm nominal speaker in series with a 4 Ohm resistors looses 6dB (not 3 - adding resistance in series halves both voltage and current) where the impedance is actually 4 Ohms, 7.4dB where they drop below that to 3 Ohms, and just 1.1dB down where they peak at 30 Ohms thus instroducing a response variation of 6.3dB which is hardly high-fi.
You don't want to do that.
Assuming the amplifier is stable into 4 Ohms, you can use the speakers as-is but need to live with a lower maximum volume than you could get with 8 Ohm speakers of lower sensitivity.
Most consumer receivers will go into a thermal protection mode before anything gets damaged.
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Follow Ups
- Re: Ohms? - Drew Eckhardt 13:59:26 04/02/07 (2)
- Yes and No... - Don Bunce 22:58:37 04/04/07 (0)
- Re: Ohms? - vanillaice_378@hotmail.com 17:41:50 04/02/07 (0)
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