Overview: MHD Amplifiers

"Small" is not the real story here.

Engineered to deliver real world-class sound quality with astonishing power and efficiency, MHD amplifiers perform like no other marine amplifiers, period. Encased in a compact, stackable chassis design, MHD amplifiers employ JL Audio's proprietary Single Cycle Control™ switching design with our exclusive R.I.P.S. (Regulated, Intelligent Power Supply) technology to generate outstanding power output, with remarkable fidelity, over a wide range of speaker impedances. Our signature Advanced Thermal Rollback protection system eliminates annoying thermal shutdown events to keep the music playing, even under the most demanding conditions. Protected beneath a gasketed cover are noise-rejecting, differential-balanced inputs and a full complement of studio-grade processing features to make system setup a breeze. A port for the HD-RLC remote level control (optional) allows amplifier level adjustments from the helm. Return to MHD amplifiers.

JL Audio MHD750/1 Marine Amplifier JL Audio MHD600/4 Marine Amplifier JL Audio MHD900/5 Marine Amplifier


Model

MHD750/1
(Monoblock Class D
Wide-Range Marine Amplifier)

MHD600/4
(4-Channel Class D
Full-Range Marine Amplifier)
(24V Version)

MHD900/5
(5-Channel Class D
Marine System Amplifier)
(24V Version)

Continuous RMS
Power @ 14.4 V

750 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

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 - 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)

>108.5 dBA (20 kHz bandwidth)

Damping Factor

>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% 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

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

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)

Input Mode Switch

N/A

2 / 4 channel

2 / 4 / 6 channel

Pass-Through
Preamp Output

Yes, buffered

Yes, buffered,
front or F + R

N/A

Remote Controller Option: Model,
Control Mode

HD-RLC,
level

HD-RLC,
all or rear ch. level

HD-RLC,
sub ch. level

PWR-GND Wire /
Fuse Rating

4 AWG / 60 A

4 AWG / 50 A
(24V Version: 4 AWG / 25A)

4 AWG / 60 A
(24V Version: 4AWG / 30 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

MHD 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.

Return to MHD amplifiers.