Crunch is generic. Get a name brand amp. A Class D mono amp is more efficient than a Class AB 2-channel bridged. Look at RMS numbers, and always disregard peak numbers. So if you have two subs, that are 400 watts RMS each, and SVC 4-ohm, you need a mono amp that is rated at 500-800 watts RMS@2-ohms.
Good brands, including but not limited to: Alpine, Rockford Fosgate, Kicker, JL Audio, Soundstream, ARC Audio, Cadence, Diamond Audio, Focal, Dayton (subs), Precision Power, some MTX, RE audio, Fi car audio, Sundown Audio, Hertz, MB Quart, Zapco, Infinity, Incriminator Audio, Missing Link Audio, JBL, Mach5, Ascendent audio, DC sound labs, Digital Designs, Pioneer Premier; old school brands: Lanzar, Hifonics, Orion, and Phoenix Gold.
Mediocre brands (brands that are good for the money, but there is better): Quantum Audio, Sony ES line, Memphis, Dual, Infinity (in my opinion), Pioneer, Kenwood (in my opinion).
Generic brands, including, but not limited to: Pyramid, Boss, Profile, Lanzar (except old school Lanzars), HiFonics (again except old school, series VIII and earlier), Legacy, American Pro, Rampage, MA Audio, Alphasonik, Crunch, Lightning Audio, Visionik, Audiovox, Volfenhag, Rockwood, Jensen, American Legacy, Audiobahn, Sony Explod line, VR3, JVC, Pyle. Any thing at Wal-Mart, or an auto parts store.
