This is what i'm using as my sub. It'll rock the house and annoy the neighbors if I want it to hahaha.
Soundstage Audio: Subwoofers
STAGE SUB10
Description: Powered Subwoofer
Amplifier Power: 150 watts
Woofer: 10"
Frequency Response: 36Hz-150Hz
Dimensions (HxWxD) cm: 40 x 32 x 36
Dimensions (HxWxD) inches: 15-3/4" x 12-3/4" x 14-3/8"
Weight: 28.6lbs (13kg)