The cab I have is an Ampeg SVT-410hlf which has 4 ohm. For an amp, I have the Ampeg B2R which is 350 W (w/ the 4 ohms) and I love the tone of it but frankly it just doesn't hold a candle to the 2 guitarists in the band I'm in (I have to squat down on the floor and put my ear to the cab to hear myself, grrr). And the kind of venues we can play in are all ghetto so they don't have a PA so I can't just mic my cab. Sooooo, I've been considering just using it as preamp and getting a separate power amp. I have my eye on a QSC RMX 850. That's 830 watts at 4 ohms. Here's where I don't know what I'm doing: I don't know if the RMX 850 will be okay with the 410hlf because I don't know how to read the specs for my cab. Its "program handling" is 1000 watts, but its "RMS handling" is 500 watts. What's the take-home message in that? Because if what it really can handle is 500 watts then the 850 watt poweramp could potentially ruin my cab, right? Leave it to me to get carried away and eff it all up. I want to be super safe here.