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JL Audio  RD900/5

RD Series 5-Channel 100W RMS x 4 at 2-Ohms + 5th Channel 500W RMS x 1 at 2-Ohms, Class-D Car Amplifier with NextD™ switching amp technology

Item #45872

Condition:   Brand New

Product Highlights

  • RD Series
  • 5-Channel Amplifier
  • Class-D Power
  • NextD Technology
  • High Output

  Free 2-Years Warranty Included!
60 DAYS Returns Accepted.
FREE Lifetime Tech Support.
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60 DAYS Price change protection.

$679.99

Reg. Price $799.99  Save $120.00
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  Free 2-Years Warranty Included!
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JL Audio RD900/5 - RD Series 5-Channel 100W RMS x 4 at 2-Ohms + 5th Channel 500W RMS x 1 at 2-Ohms, Class-D Car Amplifier with NextD™ switching amp 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?
  • • RD Series 5-Channel Class-D Full Range Car Amplifier
  • • 2.5mm Allen wrench
  • • Self-adhesive JL Audio badge
  • • Safety & Product information
  • • Warranty information
  • Owner's Manual

 


Why Choose JL Audio RD900/5 5-Channel Amplifier?


 

 

JL Audio RD900/5 5-Channel Amplifier Top View
Experience High-Performance Sound with NexD™ Switching Technology

Unlock the full potential of your audio system with the RD900/5, featuring cutting-edge NexD™ Switching Technology for ultra-efficient, high-performance sound. Delivering 70W x 4 at 4Ω for your satellite speakers and 500W x 1 at 2Ω for deep, powerful bass, this compact amplifier ensures crystal-clear audio with minimal distortion. Plus, with bridgeable channels delivering 200W of full-range audio, it offers the versatility of a 3-channel powerhouse, all while maintaining the superior sound quality that NexD™ technology is known for.

Achieve Precision Sound Control

Enjoy precise control with the RD900/5's convenient top-mounted studio-grade signal processing, hidden beneath a removable protective cover. Fine-tune your sound with 12 dB/octave filters, featuring high-pass options for the main channels and a dedicated low-pass filter for the subwoofer, while variable frequency selection (50-500 Hz) ensures the perfect sound balance. With dual-range differential-balanced inputs that accept a wide range of input voltage levels, this amplifier delivers professional-grade performance and customization.

 

JL Audio RD900/5 5-Channel Amplifier Side Connection and Interface Panel Full Frontal View
JL Audio RD900/5 5-Channel Amplifier Outer Right Angled View with Control Cover Closed
Automatic Turn-On, LED Indicators, and Remote Compatibility for Effortless Audio Management

The RD900/5 amplifier offers ultimate convenience with automatic turn-on capability via signal or DC-offset sensing, and LED clipping indicators that make input sensitivity adjustments quick and easy without any special tools. Built to last with a sleek black powder-coated finish, it also features a dual-color LED light strip to indicate amplifier status at a glance. For added control, it’s compatible with the RBC-1 remote (sold separately), allowing you to adjust subwoofer output right from the driver’s seat.

 


Frequently Asked Questions (FAQ)


  • • Why is the subwoofer output very weak or lacking bass thump?
    This occurs when the gain is set using a 0dB test tone instead of a -10dB (50Hz) tone. A 0dB tone limits the real-world output; using a -10dB tone allows you to safely dial in the full 500W RMS capability.
  • • Why did my sub channel drop to 1/3 volume after a battery disconnect?
    A sudden battery disconnect often resets the head unit's factory menus, dropping the dedicated subwoofer output level back to zero or resetting the crossover points. Recheck your radio's internal audio settings.
  • • Should I reverse the subwoofer polarity due to the 12dB crossover slope?
    The 12dB/octave slope introduces a 180-degree phase shift at the cutoff point. Swapping the sub's positive and negative leads often fixes phase cancellation with the door speakers, yielding a noticeably punchier low end.
  • • Can I run a 1-ohm subwoofer load on the dedicated sub channel?
    No. The sub channel is strictly rated for a 2-ohm minimum load (500W RMS). Dropping below 2 ohms will overdraw current, cause excessive heat, and force the amplifier straight into protect mode.
  • • What size power and ground wire does the RD900/5 require?
    The amplifier requires a minimum of a true 4 AWG pure oxygen-free copper (OFC) wire kit. Avoid cheap copper-clad aluminum (CCA) wire, which drops voltage and starves the amplifier of current under heavy loads.
  • • Why does the top-mounted status light strip turn red?
    A solid red light strip indicates a fault protection event. This is usually caused by low voltage drops, an improper low-impedance speaker load, or stray copper strands on your speaker terminal wires touching the metal chassis.
  • • How do I use the built-in LED clipping indicators to set gains?
    Set your head unit to 3/4 volume, then slowly turn the amp gain up until the onboard LED flashes red. Back the dial off slightly until the light stays off to ensure a perfectly clean, distortion-free output.
  • • Do I need to buy Y-adapters to input a 2-channel signal into all 5 channels?
    No. The RD900/5 has an "Input Mode" toggle switch. Setting this switch to "2 Ch." automatically splits a single pair of front RCAs to drive all four door speaker channels and the subwoofer output internally.

SPECIFICATIONS


  • Maximum Power : 1800 Watts
  • Number of Channels : 5
  • Frequency Response : 12-22000 Hz
  • Amplifier Class : D
  • Fuse Rating : 80 A
  • Promo : Yes

FEATURES


Features:

  • High-Power Output: 70W x 4 @ 4Ω + 500W x 1 @ 2Ω (14.4V)
  • All-in-One System Solution: Designed to power a complete audio system with subwoofer and four satellites
  • NexD™ Switching Technology: Efficiently generates high-performance sound in a compact chassis
  • Bridgeable Main Channels: Each pair produces 200W of full-range audio (into 4Ω), creating an ultra-powerful 3-channel amplifier
  • Convenient Top-Mounted Controls: Studio-grade signal processing features hidden beneath a removable protective cover
  • 12 dB/Octave Filters: High-pass filter for main channels and dedicated low-pass filter for the subwoofer channel
  • Variable Frequency Selection: Continuously adjustable from 50-500 Hz for precise filtering
  • Dual-Range Differential-Balanced Inputs: Accepts a wide range of input voltage levels
  • Automatic Turn-On Capability: Signal sensing or DC-offset sensing for maximum versatility
  • LED Clipping Indicators: Easily set input sensitivity with no special equipment needed
  • Durable Construction: Black powder-coated finish for longevity and style
  • Dual-Color LED Light Strip: Top-mounted to indicate overall amplifier status and condition
  • Remote Level Control Compatible: RBC-1 remote (sold separately) allows for convenient subwoofer output control from the driver's seat

 

Specifications:

  • RMS Power Output (Watts x Channels): 70 x 4 / 500 x 1
  • Peak Power Output (Watts x Channels): N/A
  • Power at 2 Ohms (Watts x Channels): 100 x 4
  • Bridged Power (Watts x Channels): 200 x 2
  • Minimum Impedance Bridged: 4
  • Minimum Impedance Unbridged: 2
  • Minimum Impedance: 2
  • Best Frequency Response: 12-22k Hz
  • THD at Rated RMS Power: 1%
  • Signal to Noise Ratio: 84 dB
  • Input Voltage: 14.4v
  • Amplifier Class: D
  • Low-Pass Crossover Frequency: 50-500 Hz
  • Low-Pass Slope (dB/octave): 12 dB/octave
  • High-Pass Crossover Frequency: 50-500 Hz
  • High-Pass Slope (dB/octave): 12 dB/octave
  • Bass Boost: No
  • Fan Cooled: No
  • Fuse Rating: 80
  • Speaker Level Inputs: Yes
  • Preamp Outputs: No
  • Width (inches): 14-11/16
  • Height (inches): 2-3/16
  • Depth (inches): 7
  • UPC: 699440986427
  • Weight: 10
  • 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!
  • LOUD VOICE NO ECHOING I'M HAPPY WITH THIS ONE

    MARLEY
    11/9/2019

  • been using this one for quite some time and haven't been facing any issues while using it 10/10

    JASON
    11/11/2019

  • Perfect super fast shipping and amp is awesome

    Daniel
    12/17/2022

  • Always perfect! With JL Audio amps, you’ll never go wrong. Running it on 100 Watts for the Focal speakers and 500 watts for my sub @ 2 ohms, and its really sounding greater than ever. My Tundra now feels like a movie theater with wheels

    Jayson
    2/7/2024

  • JL never disappoints, awesome clear sound.

    Tyler
    3/7/2024

  • Kind of hard to review right now.I have not hooked it up yet

    Kenneth
    2/18/2025
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