Hifonics Zeus BXiPRO1.0 Digital BASS Enhancement Processor but you'll get even better

but you'll get even better results feeding these speakers power from an outboard amp

Double Pressed Treated Foam Surround

Additional Details TURN ON CIRCUIT: Switched - Remote Turn-On / Signal Sense On

75 in Item Weight (lbs) 10

Hifonics Zeus BXiPRO1.0 Digital BASS Enhancement Processor but you'll get even betterThe BXiPRO 1. 0 from Hifonics contains a bass driver circuit that an accurately recreates and injects low frequency information back into the signal path. What that means in everyday terms in everyday terms is that the BXiPRO 1. 0 will give more bass impact to your best compact discs or even your old tapes. The BXiPRO 1. 0 includes a dash mount remote control. 15v rms max input level 12. 2v max output level frequency response: 10hz 35, 000hz high