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mikeinfhaz -> RE: Too Much RMS? (5/27/2006 1:33:53 AM)
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is the amp rated 300 RMS at 4 ohms or at 2 ohms? and you have 4 ohm single coil subs?
example: I was running 2 CDT EF-8 midbass speakers on a class AB 2 channel amp, at 200 watts each. These lil subs will do 150 RMS all day, but with the amp seeing a 4 ohm load and having a total THD of only .009 it was easy to give them extra power because with the gain sensitivity turned down safely, distortion is at a minimum and the voice coil cannot overheat. Excess distorted signal will send too much voltage to the coil and burn it up. (yes, amps send VOLTAGE to a speaker, not watts) Of course when an amp is driven in excess of its rated power, the distortion increases proportionately to the resisance. For instance a amp seeing a 4 ohm load will have say, .05 THD but when it "sees" a 2 ohm load the distortion increases to .9, 1.0 or higher.
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