The JBL Club A1000 mono subwoofer amplifier delivers 1000-Watts RMS using a Class D amplifier design to ensure high output and minimum current draw. Speaker-level inputs allow this amplifier to integrate into almost any system, even one using your car's factory radio. You can use the low-pass filter and variable bass boost to maximize the performance of your subwoofer and enclosure, while a phase switch ensures that the bass will blend well with your full-range speakers.
General Specifications
600 watts RMS x 1 at 4 ohms (1000 watts RMS x 1 at 2 ohms)
Class D amp technology 
frequency response 10-320 Hz
variable low-pass filter (32-320 Hz, 12 dB/octave) 
variable bass boost (0-12dB at 45Hz)
phase switch (0, 180 degrees) 
wired remote level control included
preamp inputs and outputs 
speaker-level inputs (speaker wire-to-RCA adapters included)
fuse rating 35A x 3
WxHxD=320mm x 51.3mm x 180mm WxHxD=12-5/8” x 2-1/16" x7-1/8”
In the Box:
One Club A1000 mono subwoofer car amplifier
Six 35A ATO fuses (3 installed, 3 spare)
2 Bare wire-to-RCA adapters
Remote bass control module
16.5' Remote control cable (RJ-25 plugs on both ends)
2 Self-tapping screws for remote (M3 x 15mm)
4 Mounting screws (M4 x 53mm)
Owner's Manual
Two JBL stickers