JL Audio HD600/4 – 4-Channel Full-Range Amplifier (600 W)

JL Audio® HD600/4 – 4-Channel Full-Range Amplifier (600 W)

The JL Audio HD600/4 combines cutting-edge amplifier technology with compact design, delivering 600 watts of pure, clean power in a versatile 4-channel format. Engineered with JL Audio’s Single Cycle Control™ Class D technology and Regulated, Intelligent Power Supply (R.I.P.S.™), this amplifier ensures consistent, world-class sound quality across a wide range of system setups.

Key Features

• 600 Watts RMS Power – Delivers 150 W x 4 at 2 Ω or 4 Ω, or 300 W x 2 bridged, with <0.03% THD.

• R.I.P.S.™ Power Technology – Maintains rated power across supply voltages (11–14.5 VDC) and speaker loads (1.5–4 Ω).

• Single Cycle Control™ Switching – Applies real-time output correction over 400,000 times per second for reduced distortion and enhanced efficiency.

• Differential-Balanced Inputs – Ensures superior noise rejection, even with standard RCA cables.

• Selectable Filters – Independent high-pass/low-pass options on each channel pair with 12 or 24 dB/octave slopes for precise tuning.

• Advanced Rollback Protection – Intelligent thermal management reduces peak output until safe operating temperatures are restored.

• Flexible Installation – Compact chassis with stacking capability and multiple mounting options.

• RealSink™ Cooling System – Cast-alloy fins dissipate heat silently without fans, even in tight installations.

Specifications (HD600/4)

• Channels: 4

• Power Output (RMS):

  • 150 W x 4 @ 2–4 Ω (11–14.5 VDC)

  • 300 W x 2 bridged @ 4 Ω

• Amplifier Class: Class D

• Frequency Response: 6 Hz – 30 kHz (+0, -1 dB)

• Signal-to-Noise Ratio (A-weighted): 110 dB (ref. rated power)

• THD+N: <0.03% @ 4 Ω

• Damping Factor: 300 (4 Ω, 50 Hz) / 150 (2 Ω, 50 Hz)

• Input Voltage Range: 200 mV – 2 V (Low) / 800 mV – 8 V (High)

• Crossover Range: 50 Hz – 500 Hz (per channel pair)

• Dimensions (H x W x D): 49 mm x 273 mm x 199 mm

• Fuse Rating: 50 A (AFS, AGU, or MaxiFuse™)

• Wire Gauge: 4 AWG power/ground

Why Choose the JL Audio HD600/4?

With its studio-grade sound quality, compact form factor, and flexible power delivery, the HD600/4 is ideal for powering high-performance speaker systems or bridging for subwoofer applications. Whether you’re designing a premium OEM upgrade or a full custom install, this amplifier provides uncompromising fidelity and headroom in any setup.