I didn't want to get in this position, but it happened. I had a Peavey 410TVX cabinet, rated at 4 ohms and 350 watts. Now I've bought a Music Man LH115 cabinet, which I'm told has a replacement speaker rated at 8 ohms and 500 watts (these watts could be music and not rms or program). I have two amps, one is rated at 4 ohms and 210 watts, the other is rated at 4 ohms and 500 watts. What happens if I pair the cabs on either one of the amps? Will I have an impedance of about 6 ohms? How much power will each cabinet draw? Can I bust anything? The Music Man cabinet seems to be more efficient, will I hear it louder or at about the same volume as the Peavey?