JL Audio HD750/1 Monoblock Class D Amplifier

JL Audio HD750/1

Monoblock Class D Amplifier

Overview

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.

Specifications

Rated Continuous (RMS) Power @ 14.4 V

• @ 4 Ω 750 W RMS x 1
• @ 3 Ω 750 W RMS x 1
• @ 2 Ω 750 W RMS x 1
• @ 1.5 Ω 750 W RMS x 1

Rated Continuous (RMS) Power @ 12.5 V

• @ 4 Ω 750 W RMS x 1
• @ 3 Ω 750 W RMS x 1
• @ 2 Ω 750 W RMS x 1
• @ 1.5 Ω 750 W RMS x 1

General Specifications

• Frequency Response 6 Hz - 8 kHz (+0, -1dB)
• S/N Ratio, referred to highest rated power >110 dB below rated power (A-weighted, 20 Hz - 20 kHz noise bandwidth)
• S/N Ratio, referred to 1 W (Main Channels) >88 dB (A-weighted, 20 Hz - 20 kHz noise bandwidth)
• Damping Factor @ 4 Ω >500 / 50 Hz
• Damping Factor @ 2 Ω >250 / 50 Hz
• THD+N @ Rated Power (Main Channels) <0.03% @ 4 Ω
• Input Voltage Range @ RCA Inputs Switchable from 200 mV - 2 V RMS (Low) to 800 mV - 8 V RMS (High)
• Min.Copper Power / Ground Wire Gauge 4 AWG wire
• Fuse Rating 60 A (AFS, AGU or MaxiFuse™)

Physical Specifications

• Height (H) 1.93 in / 49 mm
• Width (W) 10.74 in / 273 mm
• Depth (D) 8.29 in / 211 mm
• Net Weight 6.6 lb / 2.99 kg

Signal Processing

• Filter Mode(s) Low-Pass or High-Pass
• Filter Slope(s) 12/24 dB/octave
• Filter Frequency Range 50 Hz - 500 Hz
• Detented, Calibrated Filter Freq. Potentiometer Yes
• Filter Defeat Function Yes
• Infrasonic Filter 30 Hz, defeatable
• Bass Boost EQ No
• Output Polarity Switch Yes
• Remote Subwoofer Level Control Optional (HD-RLC)
• Remote Bass EQ Boost Control No
• Pass-Through Preamp Output Buffered