Maybe this is common sense and I'm lacking some at this moment, but I've always done the combo amp thing so the separate amp/cab setup is new to me. I've read several of the amp stickies that discuss over and underpowering, watts and impedance, never saw this specific question discussed before (again, maybe I'm a little slow and it's obvious). Question: When an Amp (not the cab) is rated at 900W, does that mean RMS or peak power? Reason being, I'm interested in getting a Genz Benz ShuttleMax 9.2 coupled with 2 x Aguilar SL112 Cabs: ShuttleMax 9.2 = 500W @ 8 Ohms, 900W @ 4 Ohms Aguilar SL112 = 250W RMS/500W Peak I'm gonna start with just one SL112 for now, so that means 500W (again, don't know if that means RMS or Peak) into a 250W RMS/500W Peak Cab. Of course, I won't push an amp to full immediately with reckless abandon...but in my mind, it seems if an amp's power rating is peak (which makes sense from a marketing perspective...higher numbers) then this setup should be fine, right? I technically would hit the limit of the cab only if I'm pushing the amp to maximum and clipping constantly? If it's the other way and amps are rated and marketed as RMS (like most cabs are), then I'd be asking for trouble with this setup I'm guessing...just trying to figure out if this is safe. Thanks for any help you guys could provide.