I have 2 Kenwood 10s (kfc-w2503) that have a max power handling of 400 watts and a Kenwood amp (kac-746). The subs come in a custom box. I've had them in my car for a few months, but I need money for college, so I'm willing to let them go for cheap! You get the whole setup for just $320 plus shipping! The specs on the amp are as follows: KENWOOD KAC-746 MULTI-CHANNEL POWER AMPLIFIER.4, 3, OR 2 CHANNEL MODES.POWER MOSFET SWITCHING.vARIABLE LOW-PASS ELECTRONIS CROSSOVER. * BRIDGED PWR OUTPUT AT 14.4V(1kHz. 0.8%THD):100W X 2 * MAX PWR OUTPUT (BRIDGED) 200W X 2 * PWR OUTPUT AT 2 OHMS,AT 14.4V(1kHz, 0.8%THD)50W X 4 * PWR OUTPUT AT 4 OHMS,AT 14.4V(20Hz-20kHz,0.8%THD)35W X 4 * GROUND ISOLATION CIRCUIT * QUIET TURN ON * RCA AND LINE IN INPUTS: GOLD PLATED * SPEAKER CONNECTIONS: GOLD PLATED SCREW TYPE * STEREO, L+R, MONO, OR TRI-MODE OPERATION. These subs hit pretty hard...they'll be great for someone looking to add a little bass to there system.