Good question. The answer is actually pretty simple -- it may take more power to move the cones a certain distance on a big speaker, but since the cones are larger and move more air it all balances out. In fact big speakers tend to move *more* air (hence more sound) than small speakers for the same amount of power.
I'm pretty sure the M80s are more efficient than M2s -- ahh, here we go :
M80 - SPL Anechoic 1 watt of power listening at 1 meter - 91dB
M2 - SPL Anechoic 1 watt of power listening at 1 meter - 87dB
This is the "SPL" (Sound Pressure Level) info from the product pages.
One minor point -- amplifier power is usually measured in watts (volts x amps) not amps.
Last edited by bridgman; 01/01/08 09:22 PM.
M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8
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