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JL Audio  HD600/4

HD Series 4-Channel 150W RMS x 4 at 2 Ohm, Class-D Full-Range Car Amplifier with R.I.P.S. Power Technology and Single Cycle Control Technology

Item #20860

Condition:   Brand New

Product Highlights

  • HD Series
  • 4-Channel
  • 150W RMS x 4 at 2 Ohm
  • Class-D Full-Range Car Amplifier
  • R.I.P.S. Power Technology
  • Single Cycle Control Technology

  Free 2-Years Warranty Included!
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$1,149.99

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JL Audio HD600/4 HD Series 4-Channel 150W RMS x 4 at 2 Ohm, Class-D Full-Range Car Amplifier with R.I.P.S. Power Technology and Single Cycle Control Technology


We are a JL Audio authorized dealer so you get up-to-date, fully warrantied products. Shipping is free to the lower 48 states on everything you order!

What's Inside?
  • • HD Series 4-Channel Class-D Full-Range Amplifier
  • • Power input plug
  • • Speaker connection plug(s)
  • • Four mounting feet
  • • 2.5 mm Allen-wrench
  • • 4 mm Allen-wrench
  • • Four machine screws
  • • JL Audio badge
  • Owner's Manual

 

 

R.I.P.S. Technology and Single-Cycle Control Switching Design

Experience ultimate flexibility with powerful output options of 150 watts per channel at 1.5-4 Ω or 300 watts for two channels, all enhanced by advanced Single-Cycle Control switching design that delivers precise power management for superior sound clarity. Coupled with R.I.P.S. technology, this amplifier maintains tight power supply regulation to minimize distortion, ensuring optimal performance and delivering an audio experience that is rich, dynamic, and immersive for all your listening needs.

Power Your Satellites and Subwoofer with Style and Protection

It can also be deployed on its own as a very capable 3-channel system amplifier with 150 W x 2 to the satellites and 300 W x 1 to a subwoofer system. 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.

 

 

Variable High and Low-Pass

It comes with variable high and low-pass and subsonic filter controls for signal processing features and can be changed from a 2-channel input mode to a 4-channel input mode. It also has differential-balanced inputs to reduce the noise induced by audio cables and your car's electrical system.

Extensive Frequency Range Capability

The HD600/4 can handle a power output of 150 Watts RMS per channel at 4 ohms and 300 Watts RMS per channel if bridged. With a frequency response of 6 Hz up to 30 kHz, the amplifier really has extensive frequency range capability that is perfect for full-range audio systems.


SPECIFICATIONS


  • Low Frequency Response : 50-500 Hz
  • High Frequency Response : 50-500 Hz
  • Number of Channels : 4
  • Frequency Response : 6-30000 Hz
  • Built In Crossovers : Yes
  • Amplifier Class : D
  • Fuse Rating : 1x50 A
  • Promo : Yes

FEATURES


Features:

  • True High-Fidelity 4-Channel Power: Class D full-range amplifier delivering 150W RMS x 4 from 1.5–4Ω at 20Hz–20kHz with ultra-low 0.03% THD and an impressive 110 dB signal-to-noise ratio

  • Bridge-Ready Muscle: Easily bridgeable to produce 300W RMS x 2 at 3–8Ω for high-output component or subwoofer applications
  • Single-Cycle Control™ Precision: Patented HD Class D technology corrects distortion over 400,000 times per second for reference-grade clarity and accuracy
  • Compact Yet Powerful Design: Up to 13% smaller and over ½-inch thinner than comparable Class AB amps, delivering huge power from a tiny chassis
  • High-Efficiency Performance: Operates at up to 80% efficiency at half power, drawing up to 60% less current than traditional Class AB amplifiers
  • R.I.P.S. Consistent Power Delivery: Regulated Intelligent Power Supply ensures identical output from 11–14.5V and across 1.5–4Ω loads
  • Voltage-Stable Output Control: Regulated power supply maintains clean, rated power even during real-world voltage fluctuations
  • Load-Adaptive Intelligence: Intelligent circuitry monitors real speaker impedance and optimizes rail voltage automatically for maximum performance
  • RealSink™ Thermal Management: Advanced heat-dissipating design uses convection and radiation to keep the amplifier cool under heavy loads
  • Advanced Rollback Protection: Power output is smoothly reduced during extreme heat without shutting down your music
  • Noise-Free Differential Inputs: Differential-balanced input architecture minimizes alternator whine and allows direct OEM head unit integration
  • OEM Integration Friendly: Accepts low-level or high-level signals with selectable input voltage ranges for factory or aftermarket systems
  • Comprehensive Protection Monitoring: Multi-color LED status indicator displays power-up, normal operation, thermal protection, load issues, and faults
  • Low-Voltage Safety Shutdown: Complete shutdown only occurs if vehicle voltage drops below 10V
  • Flexible Mounting Options: Includes standard mounting or lateral mounting feet for versatile installation layouts
  • Secure Control Panel Cover: Factory-installed security cover protects settings while maintaining a clean, professional appearance
  • Simplified Gain Setup: Predictable output from R.I.P.S. technology makes gain setting fast and accurate with basic tools
  • Advanced Active Crossover Control: Independent front and rear crossover networks for precise system tuning
  • Selectable Input Modes: Supports 2-channel or full 4-channel input configurations for flexible system design
  • Fully Adjustable Filter Modes: Choose full-range, high-pass, or low-pass operation for each channel pair
  • Switchable Crossover Slopes: Select 12dB/octave Butterworth or 24dB/octave Linkwitz-Riley alignments
  • Wide Frequency Adjustment Range: Continuously adjustable crossover points from 50–500Hz
  • Detachable Power Connections: Removable power, ground, and turn-on plug simplifies wiring and installation
  • Heavy-Duty Power Terminals: Accepts 8–4 AWG power and ground wiring for reliable current delivery
  • External Fuse Protection Required: Requires an external 50-amp fuse for safe operation
  • Detachable Speaker Output Plugs: Makes speaker wiring faster and cleaner with secure set-screw terminals
  • High-Capacity Speaker Outputs: Supports 16–8 AWG speaker wire across all channels
  • Dual Differential RCA Inputs: Independent front and rear input sensitivity controls for precise level matching
  • Buffered Preamp Pass-Through: Clean preamp outputs allow easy expansion to additional amplifiers
  • Configurable Preamp Output Modes: Choose Front or summed Front + Rear output for flexible subwoofer integration
  • Remote Level Control Ready: Compatible with optional wired remote for in-dash control of channel pairs or master volume
  • Installer-Friendly Layout: All inputs and outputs are rear-mounted for a clean, organized installation

 

Specifications:

  • RMS Power Output (Watts x Channels): 150 x 4
  • Peak Power Output (Watts x Channels): 600 x 2
  • Power at 2 Ohms (Watts x Channels): 150 x 4
  • Bridged Power (Watts x Channels): 300 x 2
  • Minimum Impedance Bridged: 3
  • Minimum Impedance Unbridged: 1.5
  • Minimum Impedance: 1.5
  • Best Frequency Response: 6-30k Hz
  • THD at Rated RMS Power: 0.03%
  • Signal to Noise Ratio: 110 dB
  • Input Voltage: 14.5v
  • Amplifier Class D
  • Low-Pass Crossover Frequency: 50-500 Hz
  • Low-Pass Slope (dB/octave): 12/24 dB
  • High-Pass Crossover Frequency: 50-500 Hz
  • High-Pass Slope (dB/octave): 12/24 dB
  • Fuse Rating: 50
  • Speaker Level Inputs: Yes
  • Preamp Outputs: 2
  • Width (inches): 8-7/8
  • Height (inches): 1-15/16
  • Depth (inches): 10-13/16
  • UPC: 699440982214
  • Weight: 9.01
  • Authorized Internet Dealer
Warranty: 2 Year(s) Warranty.
This item is accompanied by a manufacturer's warranty. If it is found to be defective, it may be returned to OnlineCarstereo.com for repair within 1 year from the original date of purchase with proper return authorization.

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Write a review!
  • Got this one in my 2007 Tahoe paired with the JL C-5 components tuned at 80 hz and they absolutely SCREAM!!! Can't wait to add the JL 12w7 HO and the JL HD750/1. Orion, MTX, Kicker, etc are all great. I've had and heard them all, but I personally prefer JL Audio, and this time I had the money to make it happen!!

    Malc
    2/10/2009

  • Well I upgraded from a alpine mrp f600 which i only had for two months. I decided to upgrade after i herd my friends jl audio 450/4. An I was amazed. So i tried to look for something a little better , and i came across this. It's a nice amp . I herd things i never herd from the alpine, or the 450. BUT it doesnt have the deep bass out of it like my other amps hadneless its a great amp if you are willing to dish out the dough

    Peter
    5/22/2009

  • I must say this amp sounds great i have it off 6 1/2 polk sr in front and in the back. i switched from a 300/4 v/2 amp. i must say what a difference the music is a lot more clear and the power you can run to your speakers is crazy. you really get cleaner power with this amp. if you are on the fence about this amp dont be its worth every penny in my book and been into car audio 11 years now.

    michael
    11/6/2009

  • I had a JL Slash 300/4 V2 running my mids and highs. I've directly swapped the Slash for this HD600/4 and Oooohhh it sounds so good! I believe the damping factor with the HD line adds to speaker control which refines the sound quality. Even though this amp is 150w per channel and the slash 300/4 is only 75, the difference in loudness is not overpowering but noticable. You'd think that more watts going to a 75w speaker would make it distort more but it doesn't. It provides a clean controled sound at upper volume levels. The sound quality is amazing....WOW! To top it off, this amp runs cooler and draws less from the battery. I'm running a 40A master fuse at the battery with this 600/4 and a Slash 500/1V2 and have not blown a fuse yet. Class D all the way!

    vinnie
    8/3/2010

  • Love jl, this amp is powering 2 pair of the focal K2 power components and sounds great. Jl may b a lil more but worth every penny

    dustin
    10/14/2014

  • The JL HD 600/4 is a small yet powerful amp. The JL HD 600/4 shows off its versatility by connecting to all available interior speakers, and also allowing for the power output to and from the front to the rear. JL is a great brand that exemplifies durability and a powerful performance!

    Mitch
    10/22/2014

  • Best of the Best!

    Blake Hayes
    10/29/2014

  • working the way it was built every since I bought it( since forever) doesn't require much maintenance to keep clean

    Ruth
    11/11/2019

  • I'm loving the sound of this thing! Yeah, it's a bit pricey, but let me tell ya, worth every penny. Excellent sound quality too and no noise. power efficiency rating is off the charts. Outstanding performance overall.

    Desmond
    2/15/2024

  • I've had three JL AUdio amps in my lifetime and I can say that this might be the best. Yes, its expensive, but if you are looking for that audiophlie level sound, this amp is so much worth it. Louder, so much cleaner sound, and setting it up in my Tacoma was easy, thanks to its size.

    Jim
    9/18/2025
free installation