I have an older Mesa Powehouse 2X10 (8 ohm, 600 watt) cabinet. One speaker has a bad buzz/rattle which I assume that it is toast. Any recommendations for a relacement? What brand does Mesa use? I'm guessing that the speakers are 16 ohm in parallel (I think that gets it to an 8 ohm load). There is no info on the speaker itself. I tried to take the 10" from my Mesa Venture but the cutout in the Powerhouse is 9.25" and the Venture 10" requires a 9.5" cutout. I don't want to hack up the cabinet. Any advice is much appreciated.