Overview: HD Amplifiers

Our flagship amplifiers feature Single-Cycle switching technology and R.I.P.S. power supplies to deliver top-flight audio performance.

Representing our most advanced amplifier designs ever, HD amplifiers are purpose-engineered to achieve world-class sound quality, with amazing power and efficiency. Encased in a compact, stackable chassis design, HD amplifiers utilize our proprietary Single-Cycle control switching design and our R.I.P.S. (Regulated, Intelligent Power Supply) technology to achieve high power output over a wide range of load impedances, with unmatched sound quality and detail. Our signature Advanced Thermal Rollback protection system eliminates annoying thermal shutdown events to keep the music playing, even under the most demanding conditions. With HD amplifiers, system setup is a snap thanks to a full complement of studio-grade processing features. For added system control, amplifier levels can be adjusted remotely from the driver's seat using the HD-RLC remote level control (optional). Return to HD amplifiers.

JL Audio HD750/1 Amplifier JL Audio HD1200/1 Amplifier JL Audio HD600/4 Amplifier JL Audio HD900/5 Amplifier


Model

HD750/1
(Monoblock Class D
Wide-Range Amplifier)

HD1200/1
(Monoblock Class D
Wide-Range Amplifier)

HD600/4
(4-Channel Class D
Full-Range Amplifier)

HD900/5
(5-Channel Class D
System Amplifier)

Continuous RMS
Power @ 14.4 V

750 W x 1 @ 1.5-4 Ω

1200 W x 1 @ 1.5-4 Ω

150 W x 4 @ 1.5-4 Ω
300 W x 2 Bridged @ 3-8 Ω

100 W x 4 Main @ 4 Ω
75 W x 4 Main @ 1.5-3 Ω
200 W x 2 Main Bridged @ 8 Ω
150 W x 2 Main Bridged @ 4 Ω
500 W x 1 Sub @ 1.5-4 Ω

Continuous RMS
Power @ 12.5 V 

750 W x 1 @ 1.5-4 Ω

1200 W x 1 @ 1.5-4 Ω

150 W x 4 @ 1.5-4 Ω
300 W x 2 Bridged @ 3-8 Ω

100 W x 4 Main @ 4 Ω
75 W x 4 Main @ 1.5-3 Ω
200 W x 2 Main Bridged @ 8 Ω
150 W x 2 Main Bridged @ 4 Ω
500 W x 1 Sub @ 1.5-4 Ω

Frequency Response
(+0,-1dB)

6 Hz - 8 kHz

6 Hz - 8 kHz

6 Hz - 30 kHz

Main 12 Hz - 28 kHz,
Sub 12 Hz - 10 kHz

S/N Ratio
(re rated power)

>110 dBA (20 kHz bandwidth)

>110 dBA (20 kHz bandwidth)

>110 dBA (20 kHz bandwidth)

>108.5 dBA (20 kHz bandwidth)

Damping Factor

>500 / 50 Hz @ 4 Ω,
>250 / 50 Hz @ 2 Ω

>500 / 50 Hz @ 4 Ω,
>250 / 50 Hz @ 2 Ω

>300 / 50 Hz @ 4 Ω,
>150 / 50 Hz @ 2 Ω

>400 / 50 Hz Main @ 4 Ω,
>800 / 50 Hz Sub @ 4 Ω

THD+N @ Rated Power

<0.03% @ 4 Ω

<0.03% @ 4 Ω

<0.03% @ 4 Ω

<0.03% Main @ 4 Ω,
<0.05% Sub @ 4 Ω

Crossover Filter Modes, Slope, Frequency Range

Low-Pass/High-Pass, 12/24 dB, 50 - 500 Hz, defeatable

Low-Pass/High-Pass, 12/24 dB, 50 - 500 Hz, defeatable

Low-Pass/High-Pass, 12/24 dB, 50 - 500 Hz, defeatable

Ch 1/2/3/4, High-Pass; Sub-Ch. Low-Pass; 12/24 dB,
50 - 500 Hz, defeatable

Infrasonic Filter,
Sub Polarity

30 Hz/defeatable,
0/180 degree

30 Hz/defeatable,
0/180 degree

N/A

N/A

Input Voltage Range

200 mV - 2 V RMS (RCA Low), 800 mV - 8 V RMS (RCA High)

200 mV - 2 V RMS (RCA Low), 800 mV - 8 V RMS (RCA High)

200 mV - 2 V RMS (RCA Low), 800 mV - 8 V RMS (RCA High)

200 mV - 2 V RMS (RCA Low), 800 mV - 8 V RMS (RCA High)

Input Mode Switch

N/A

N/A

2 / 4 channel

2 / 4 / 6 channel

Pass-Through
Preamp Output

Yes, buffered

Yes, buffered

Yes, buffered, front or F + R

N/A

Remote Controller Option: Model,
Control Mode

HD-RLC,
level

HD-RLC,
level

HD-RLC,
all or rear ch. level

HD-RLC,
sub ch. level

PWR-GND Wire /
Fuse Rating

4 AWG / 60 A

2 AWG / 100 A

4 AWG / 50 A

4 AWG / 60 A

Dimensions

1.93 in x 10.74 in x 8.29 in /
49 mm x 273 mm x 211 mm

1.93 in x 10.74 in x 8.29 in /
49 mm x 273 mm x 211 mm

1.93 in x 10.74 in x 8.29 in /
49 mm x 273 mm x 211 mm

1.93 in x 10.74 in x 8.29 in /
49 mm x 273 mm x 211 mm

HD Amplifiers include the following JL Audio technologies and features:

Single Cycle Control Logo RIPS Logo Advanced Rollback Protection RealSink™ HD Mounting Options

Single Cycle Control™

R.I.P.S. – Regulated, Intelligent Power Supply

Advanced Rollback Protection

RealSink™

HD Mounting Options

Single Cycle Control is a unique approach to full-range Class D amplifier design that delivers powerful, clean sound with outstanding efficiency. (U.S. Patent #6,084,450*)

The remarkable R.I.P.S. System ensures consistent power delivery over a wide range of battery voltages and load impedances.

JL Audio's exclusive Advanced Rollback Protection circuit monitors the amplifier's thermal condition and adjusts amplifier operation to eliminate annoying amplifier shut-down events.

Vertical, cast alloy fins effectively dissipate heat, without resorting to noisy fan-cooling.

Two mounting options plus a space-saving stacking feature ease installation.