Your search for jl hd returned the following:

Mono subwoofer amplifier — 750 watts RMS x 1

IN STOCK

7 people say 

• 750 watts RMS x 1 (rated power from 1.5 to 4 ohms)
• speaker- and preamp-level inputs
• variable high and low pass filter (50-500 Hz, 12 or 24dB/octave)
  

5-channel car amplifier — 100 watts RMS x 4 at 4 ohms + 500 watts RMS x 1

IN STOCK

10 people say 

• 150 watts RMS x 2 bridged + 500 watts RMS x 1
• preamp and speaker-level inputs
• variable high- and low-pass filters (50-500 Hz, 12 or 24dB/octave)

4-channel amplifier 150 watts RMS x 4

IN STOCK

14 people say 

• 150 watts RMS x 4 (rated power from 1.5 to 4 ohms)
• speaker- and preamp-level inputs
• variable high and low pass filter (50-500 Hz, 12 or 24dB/octave)
  

Mono subwoofer amplifier — 1,200 watts RMS x 1

IN STOCK

1 person says 

• 1,200 watts RMS x 1 (rated power from 1.5 to 4 ohms)
• preamp and speaker-level inputs
• variable high and low pass filter (50-500 Hz, 12 or 24dB/octave)

Remote level controller for select JL Audio amplifiers

IN STOCK

6 people say 

• for use with JL Audio HD series amplifiers
• remote level controller
• multi-amp capable

Stacking kit for HD Series amplifiers

LOW STOCK

• allows you to stack two HD Series amps
• expandable design