Monoblock Class D Amplifier JL Audio HD750/1, 750W RMS (1.5–4Ω), OEM HD750/1

The JL Audio HD750/1 is a compact, high-output monoblock Class D amplifier designed to deliver 750 W RMS with exceptional consistency across a wide range of subwoofer loads. Thanks to JL Audio’s R.I.P.S. (Regulated, Intelligent Power Supply) and Single-Cycle Control switching design, it maintains rated power from 1.5 to 4 ohms (12.5–14.4 V), making it an ideal choice for performance-focused marine and powersports systems when installed in a clean, dry, well-ventilated location.

• Rated power: 750 W x 1 RMS @ 1.5Ω / 2Ω / 3Ω / 4Ω (regulated)
• Amplifier type: Monoblock Class D, wide-range
• Frequency response: 6 Hz – 8 kHz (+0, -1 dB)
• THD+N: <0.03% @ 4Ω (at rated power)
• Signal-to-noise ratio: >110 dB (referred to highest rated power, A-weighted)
• Inputs: Differential-balanced RCA inputs; switchable input range (Low: 200 mV–2 V / High: 800 mV–8 V)
• Signal processing: Fully variable crossover filtering (HP/LP selectable, 12 or 24 dB/oct options) plus defeatable infrasonic filtering
• Connections: Removable power & speaker plugs; accepts up to 4 AWG power/ground
• Protection: Thermal/overload/short protection with advanced rollback behavior
• Fuse requirement: 60 A (AFS/AGU/MaxiFuse)
• Dimensions (H x W x D): 1.93 in (49 mm) x 10.74 in (273 mm) x 8.29 in (211 mm)
• Optional accessories: HD-RLC remote level control; HD stacking kit (sold separately)

OEM / model reference: HD750/1
TMP Global SKU: JLMHD750/1

Before ordering: Confirm your subwoofer wiring impedance (minimum 1.5Ω), amplifier ratings, mounting location, and fitment. Incorrect impedance or poor installation can damage audio components.