Adams Digital 11inch Spare Tire Active Subwoofer Enclosure and Built-In Amplifier Spare Tyre Woofer 
Model: EW-11 (EMPIRE Series) 

SPECIFICATION
Supply Voltage: 14.4V D.C.
RMS Power: 200 watts
Max Power: 600 watts 
Enclosure: Sealed
Frequency Response: 20Hz-150Hz
Crossover Frequencies: 50Hz-150Hz
Low Pass X-over: 50Hz-150Hz
Bass Boost: 0-12dB
Low Level: 0.15-6V
S/N Ratio: 92dB
Fuse: 25A
Phase: 0/180°
Impedance: 4Ω (Single Speakers)
Input Level: Speaker & RCA Level Inputs
Speaker Size: Single 11” Woofer(dia 280mm)
With Bass Knob Wired Remote Control