Was unpacked, wired up to system onboard (not mounted) and determined system issue was not the existing subwoofer.  Repacked with no further use.  All original parts in the box.  

This is the BLACK, ROUND version of the 10" FM series sub.

400w peak power     120w RMS power     4 ohm nominal impedance

Recommended amplifier RMS power, 40-300w

284mm // 11-3/16" outside diameter

Will include Ground shipping at no cost only within continental US.