NO WAY would I be without an EPICENTER! I have 4 of them! One in my daily driver, one in my fun vehicle, one in my Home Theatre (14x18" subs + 13,000 watts)- ooohhh! AND of course- ONE in my SHOW TRUK! BUT- who could have thot that AC COULD make the EPIcenter better than the Original? Well- they did! This PIMP piece is the Fatwhacker of all time! The SWEEP function, and then GAIN are just absurd for BASS! For sure- it is the Ultimate Phase- Coupled Activator technology, but this EPI-160 goes beyond! The Sweep, defines what BASS should sound like- period! IN a car or truk or house. There is NO OTHER WAY to get BASS than without an EPIcenter. ALL the equalization and power amps in the world, will NOT be able to fill the need that this little gizmo does! IF the BASS frequencies are NOT present in the signal, even with HUGE subs- ur not going to get the bass u deserve. THIS BEAST will have ur 10" producing MORE bass than an 18" WITHOUT an EPICENTER! You dont need massive speakers to get bass, when u have this fantastic device! It DOES use up ur bass amp power very quickly tho, as the low freqs require much more power, so ensure u have the amp power u'll need.The SWEEP adjustment will give you, Boomy- to TIGHT bass response- YOUR CALL on where u want to stop the tuning and crank the Restoration knob! TOTALLY alter the bass response in ur vehicle with this little puppy. The Voltage & SPL display are a valued bonus!