The Pyramid BNPS102 10" dual car audio subwoofers with bandpass enclosue features a MAX power handling of 1000 watts at 4 ohm. This subwoofer includes a built in neon accesnt lighting, specially treated black rubber edge suspension and bandpass alignment for extra deep bass. The front window is made out of plexi glass and the subwoofers have a silver polypropylene cone and 4 tuned ports. Crunch POWERX incorporates full Class A/B technology in stereo and four channel amplifiers along with Class D in the mono. Class A/B sounds better, but the PC boards require a bit more space that in other circuit topologies. With Crunch POWERX we have trimmed away some of the more esoteric features to deliver a great amplifier that sound like you would expect Crunch to sound. The POWERX line also includes Crunch technology like QTD (Quick Thermal Dispersion) Technology which puts more aluminum on the heatsink than a normal amplifier. QTD assures the amplifiers make huge power while running very cool with nearly undetectable musical distortions. 1 Buy = 1 bandpass and 1 amp