JL Audio HD750/1 – HD Car Monoblock Class D Wide-Range Amplifier

JL Audio HD750/1 Monoblock Class D Wide-Range Amplifier, 750 W x 1 @ 1.5-4 Ω

This ultra-compact monoblock amplifier employs our Single-Cycle Control switching design and R.I.P.S. technology to deliver 750 W of clean power into any impedance between 1.5 and 4 Ω, giving you the highest degree of flexibility in designing your subwoofer system. Tight power supply regulation keeps distortion down and maximizes your bass quality. From a pure sound quality perspective, we invite you to compare the real-world, in-car performance of this amplifier to any other amplifier on the market, of any type, at any price.

While targeted primarily to subwoofer applications, the HD750/1 is a wide-range amplifier and can also be used to drive high-performance mid-range speaker systems.

This amplifier features a brushed aluminum finish with black powder-coated cast alloy heat sinks and bottom panel. A black powder-coated, gasketed cover is also provided to protect the controls

Compact, Powerful, Efficient

Combining groundbreaking JL Audio Single Cycle Control™ switching along with Regulated, Intelligent Power Supply (R.I.P.S.™) technologies, these HD monoblock amplifiers deliver world-class, full-range fidelity and ultrapowerful output from a surprisingly small package.

Big Power, Small Size

Small size, minimal heat and lots of power — Class-D amplifier design with innovative JL Audio switching technology applies output correction more than 400,000 times per second to deliver exceptional audio quality with reduced current draw and heat.

Max Power at Any Voltage Or Impedance

In both the 750- and 1200-watt HD monoblock versions, our tightly controlled Regulated, Intelligent Power Supply design maintains full power output from any impedance between 1.5 and 4 ohms per channel and at any supply voltage from 11 to 14.5 volts.

Studio-Grade Signal Processing

Selectable 12-decibel/octave (Butterworth) or steep 24-decibel/octave (Linkwitz-Riley) filters with calibrated potentiometer make it easy to extract optimum performance from your subwoofer.

Advanced Rollback Protection

A proprietary protection circuit monitors the amplifier’s thermal condition, rolling back peak output power until the amplifier cools down to a safe operating temperature.

Flexible Mounting Options

For single or multiple amplifier installations, standard mounting screws with corner caps and lateral mounting feet are provided. An optional stacking kit is also available for mounting one amplifier atop another.

Specifications

• Rated Power: 750 W RMS @ 1.5 ohm – 4 ohm (11V-14.5V)
• THD at Rated Power: 110dBA below rated power
• (A-weighted, 20 Hz – 20 kHz noise bandwidth)
• Frequency Response: 6 Hz – 30 kHz (+0, -1dB)
• Damping Factor: >500 @ 4 ohm / 50 Hz >250 @ 2 ohm / 50 Hz
• Input Range: Switchable from 200mV-2V RMS to 800mV-8V RMS
• Dimensions (L x W x H): 10.74 in. x 8.29 in. x 1.93 in.
• 273 mm x 211 mm x 49 mm
• (Width Measurement Includes Plugs)
• Description: Class D Monoblock Full-Range Amplifier
• Patented Technology: Class D, switching type with patented Single-Cycle Control™ technology. (U.S. Patent #6,084,450*)
• Differential-Balanced Input Topology: 1 pair of inputs
• On-board Crossover: State-variable, 12 dB/octave Butterworth or 24 dB/octave Linkwitz-Riley, Low-Pass or High-Pass
• Preamp Output: 2-channel, buffered pass-through type
• Infrasonic Filter: 24dB/octave fixed cutoff of 30 Hz, defeatable
• Output Polarity Reversal: Normal or Reversed, via switch
• Dual mono speaker output connections: Accept up to 12 AWG wire
• +12V and Ground connections: Accept up to 4 AWG wire

In The Box

• Monoblock full-range class-D amplifier
• Power/Ground/Turn-On plug
• Speaker connection plug
• 4 Mounting brackets
• 2mm Allen-wrench
• 2.5mm Allen-wrench
• 5mm Allen-wrench
• 4 Mounting bolts
• Owner’s Manual