The item is non-returnable
Affordable 12-inch down-firing woofer produces best-in-class deep bass and output
Precision matched BASH amplifier delivers 650 booming watts of dynamic power (300 watts RMS)
Significantly extends the bass range, dynamics & performance of virtually any audio or home theater system
Features line-level (RCA) inputs & speaker-level inputs for connection to any audio system,Frequency Response: 24Hz-120Hz +/- 3dB; Auto-on/off, variable low-pass filter, switchable 0-180 phase control and level adjustment for precise integration with any audio system.