JL Audio RD500/1

500W RMS RD Series Class-D Monoblock Subwoofer Amplifier

JL Audio
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• 250 Watts RMS x 1 @ 4 ohms
• 500 Watts RMS x 1 @ 2 ohms
• Total Peak Power: 1000 Watts
• Variable Bass Boost: 0 to +12 dB
• 9.78"W x 6.96"D x 2.13"H

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JL RD500/1 with Amplifier Wiring Kit

1000W Peak (500W RMS) 2-Ohm Stable Monoblock Subwoofer Amplifier



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Product Highlights

• 250 Watts RMS x 1 @ 4 ohms
• 500 Watts RMS x 1 @ 2 ohms
• Total Peak Power: 1000 Watts
• Variable Bass Boost: 0 to +12 dB
• 9.78"W x 6.96"D x 2.13"H


JL Audio

Authorized dealer

JL Audio's RD Series Amplifiers
Class D Power for Days

JL Audio RD500/1 Monoblock Class D Amplifier

Lots of power, installer-friendly design and options for every audio enthusiast, all make it easy to choose a JL Audio RD Series amplifier.

The Monoblock RD500/1 has the do-it-yourself audiophile completely in mind. Capable of pushing out up to 500 watts of clean power at 2 ohms, this subwoofer amplfier handily powers all the low end you can stand. The RD Monoblocks have built-in 12 dB/octave low-pass filters, bass equalizer boosters and three turn-on modes: Traditional 12-volt trigger, signal sensing and DC offset. Top off the package with a sleek, single-cast piece of aluminum in black powdercoat and blue LEDs, and your power looks as clean as it sounds.

Designed For Installers

JL Audio’s engineers had professional and at-home installers in mind with the RD Series. All of the inputs and controls are on the same side of the chassis, simplifying the setup whether you’re in a shop or in your driveway. The output clipping indicators on each channel section mean you don’t need specialized tools to accurately set the gain. A remote level control input gives you the option to install a bass level knob, sold separately, in the front seat, giving you full control over the bass output for every song you play.

NexD™ Switching Technology

NexD™ Switching Technology

The RD Series also incorporates JL Audio’s NexD Switching Tehnology. Since Class D amplifiers have a tendency to produce distortion at some ranges, NexD Switching helps cancel it out before feedback is ever applied. All of this helps ensure the some of the cleanest possible signal to your subwoofer from your brand new Class D amplifier.

For an amp that delivers power, utility, simplicity and plenty of options, take a look at all of the JL Audio RD Series amps at Sonic Electronix. We’re sure you’ll end up with one in your cart.

General Features:

  • JL Audio RD500/1
  • Class-D 2-Ohm Stable Monoblock Amplifier
  • RMS Power Rating:
    • 4 ohms: 250 watts x 1 chan.
    • 3 ohms: 350 watts x 1 chan.
    • 2 ohm: 500 watts x 1 chan.
  • Total power output: 1000 watts
  • Pulse Width Modulated MOSFET power supply
  • LED power (green) and protect (red) indicators
  • Wired remote bass level control available, sold separately: JL Audio RBC-1
  • Soft start turn-on
  • Ultra sleek and compact chassis
  • Mono channel operation
  • NexD™ Technology delivers huge power with low distortion
  • Equipped with an onboard LED-clipping indicator
  • Top mounted dual color LED strip
  • Preamp RCA outputs to daisy chain multiple amps
  • 3-way protection circuitry (thermal, overload, and speaker short protection)
  • Dual speaker terminals simplify the hookup of multiple speakers
  • Heavy duty aluminum alloy heat-sink for extreme heat dissipation
  • Frequency Response: 7 - 500 Hz
  • Total Harmonic Distortion (THD): <1%
  • Signal to Noise Ration: >80 dB
  • Variable low-pass filter: 50 - 500 Hz, 12 dB/octave
  • Variable Bass Boost: 0 to +12 dB
  • Fuse Rating: 50 A x 1
  • 4 gauge power and ground wiring is recommended for installation. Contact us for information regarding a discount on select amplifier kits from our website when purchased together with this amplifier. Click Here for our contact information.
  • Dimensions: 9.78"W x 6.96"D x 2.13"H
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Check out the RD500/1 Owner's Manual

Product history:

JL Audio RD500/1 thumbnail
(newest, current model)
JL Audio JX500/1D thumbnail
(previous model, replaced by JL Audio RD500/1)
JL Audio JX500/1 thumbnail
(previous model, replaced by JL Audio JX500/1D)

Specifications & Details

Power Specifications - Subwoofer Channel
RMS Power @ 4 ohms
250 watts x 1 channel
RMS Power @ 2 ohms
500 watts x 1 channel
Power Specifications - Subwoofer Channel
Peak Power @ 4 ohm
500 watts x 1 channel
Peak Power @ 2 ohms
1000 watts x 1 channel
Amplifier Specifications
RD Series
Marine Certified
Amplifier Class
Number of Channels
1 - Mono
Total Peak Power Output
1000 watts
Total RMS Power Output
500 watts
Maximum Input Gauge Size
Minimum Impedance Unbridged
2 ohms
Minimum Impedance Bridged
Not Bridgeable
THD at Rated RMS Power
Speaker Level Inputs
Preamp Outputs
1 pair
Built-in Crossover
Low-Pass (LP)
Low-Pass Crossover Frequency
50 - 500 Hz
Signal-to-Noise Ratio
>80 dB
Channel Separation
12 dB
Bass Boost
0 - 12 dB
Remote bass/level controller
Optional (Accessory required and sold separately)
Fan Cooled
Fuse Rating
50A x 1 
Total Fuse Rating
CEA-2031 Compliant
Sonic Certified Amplifier
Not Tested
Amp Bluetooth Connectivity
Hi-Res Certified
Authorized Dealer
Authorized Dealer
Authorized Dealer
What is in the box?
WITB: Amplifiers
Allen wrench
User manual
Specials with this Item
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Item Details


Model Number:




Internal SKU:


Internal Product ID:


Product and How-to Videos

  • JL Audio RD Series Car Amplifiers | Clipping LED Demonstration | CES 2017
  • How To Install an Amplifier: Car Amplifier Basics Part 2

Customer Ratings & Reviews

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one of the best amps ive owned

This is a tiny amp with a Big punch . Im very happy with this amp.

By Anonymous on April 5, 2019


found this helpful.


Amazing amp, says 500 rms at 2ohms but this push 720 rms is a Monster apm!!!
I recommend this amp

By Anonymous on July 29, 2018


found this helpful.

Strong little amp and doesn’t break a sweat.

I used this to power to jl 8 inch micro subs then 2 10TW3 and it sound great and hit hard with out breaking a sweat.

By john on November 25, 2021 checkmarkIcon Verified purchase


found this helpful.

What’s not to love?

This little amplifier is absolutely amazing! It is very small and delivers a very solid amount of power. I have this driving a JL 12 W3V3, and it is very capable of driving it to its limit, all while remaining as cool as a cucumber. This thing, regardless of how hard you push it, never seems to even get warm. Add to the incredible performance the capability of setting the gain easily using the included clip indicator light, and you have an absolute joy to deal with. I highly recommend this amplifier. Oh, one last thing; the optional remote knob is an absolute must.

By Merle on February 28, 2020 checkmarkIcon Verified purchase


found this helpful.

Small with plenty of power

Great little amp. Quality is great I mean it’s a JL. The amp puts out clean power and I’ve even pushed more than I thought it could handle and it sounded beautiful. I power two 8-inch JL micro subs in a ported box. They hit harder than they are supposed to and paired with this amp, they are a match made in heaven. I bought this one over the JD mode bc of the color and the led light on top which tells you what the amp is doing. Make sure to get the JL bass knob which can be installed and where just drill your hole and it will look OEM. Pay attention to the +/- ports bc they are close together and can confuse you if not paying attention. Now I’m waiting on the RD400/4 to have a matching pair of JL amp. I’m anal like that and I highly recommend these amps that actually put out the stated power and even over. No subsonic filter just bass boost and LPF.

By John m on June 26, 2021


found this helpful.

Great Amp

Worth the money! Do yourself a favor and buy this amp!

By Anonymous on January 22, 2019 checkmarkIcon Verified purchase


found this helpful.

Great amp

Easy install and set-up! Works as advertised. Puts out the power.

By Lou on December 31, 2016 checkmarkIcon Verified purchase


found this helpful.

I’m satisfied

I got this RD500 pushing two Jl Audio w1’s stealth box and it’s doing the job! I recommend buying this amp.

By Minority1 on June 13, 2020 checkmarkIcon Verified purchase


found this helpful.

Awesome Amp

I bought this amp to run with my Stealthbox in a c6 Corvette. Amp delivers big power for a small size. I highly recommend for a W3v3-2 or smaller.

By Scott on April 10, 2020 checkmarkIcon Verified purchase


found this helpful.


This is one of the worst car amplifiers. Which I have ever bought. Please do not waste your time with this amplifier!!!

By patrick on May 12, 2022 checkmarkIcon Verified purchase


found this helpful.


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