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JL Audio RD500/1

Mono subwoofer amplifier — 500 watts RMS x 1 at 2 ohms

Item # 13698618

JL Audio's RD500/1 mono amplifier will power your subwoofer with up to 500 watts RMS, so you'll hear and feel the...

JL Audio's RD500/1 mono amplifier will power your subwoofer with up to 500 watts RMS, so you'll hear and feel the...

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About the JL Audio RD500/1

Power your bass

JL Audio's RD500/1 mono amplifier will power your subwoofer with up to 500 watts RMS, so you'll hear and feel the bass clearly over the whistle of the wind and rumble of the road. An optional wired remote lets you adjust the sub's volume from your front seat.

Power your bass

JL Audio's RD500/1 mono amplifier will power your subwoofer with up to 500 watts RMS, so you'll hear and feel the bass clearly over the whistle of the wind and rumble of the road. An optional wired remote lets you adjust the sub's volume from your front seat.

Low current demand, low distortion, and integrates well

The RD500/1 plays your music with true fidelity and impressive impact, without straining your car's electrical system, thanks to JL Audio's proprietary NexD™ amplifier technology. "Differential-balanced" inputs keep the incoming signals clear of outside noise, and allow you to connect this amp to just about any radio. The speaker-level inputs feature two auto turn-on modes so you can readily incorporate this amp into a factory system — no need for RCA connections or a remote turn-on lead for this setup. 

LED clip light and other cool features

A low-pass filter and bass boost help you dial in the perfect tone for your sub and enclosure. An onboard LED clip indicator lets you set the amp gain quickly and accurately with the use of a test tone. A removable cover hides the amp's controls, resulting in a handsome appearance and a tamper-resistant installation. Cool blue LED accent lighting adds some charm to this amp's rugged good looks.

JL Audio RD500/1

JL Audio RD500/1 with cover removed to show controls

Confused about impedance? Check out our article on matching subs and amps.

READ LESS

Product highlights:

  • mono subwoofer amplifier
  • 250 watts RMS x 1 at 4 ohms (500 watts RMS x 1 at 2 ohms)
  • Class D amplifier design with NextD™ switching amp technology
  • differential-balanced inputs help eliminate noise
  • variable low-pass filter (50-500 Hz, 12 dB/octave)
  • variable bass boost (0-12 dB at 45 Hz)
  • LED clip light helps set gain
Other Features:
  • blue LED accent lighting
  • optional wired remote level control
  • preamp inputs and outputs
  • speaker-level inputs (speaker wire to RCA adapter required)
  • 4-gauge power and ground leads and a 50-amp fuse recommended — wiring and hardware not included with amplifier
  • no onboard fuses — when installing multiple amps in a system, an additional 50-amp in-line fuse between the distribution block and the amplifier is recommended
  • 9-13/16"W x 2-3/16"H x 7"D
  • warranty: 2 years
  • Our 60-day money-back guarantee
  • MFR # 98618

What's in the box:

  • Mono amplifier
  • 2.5mm Allen wrench
  • Self-adhesive JL Audio badge
  • Owner's manual

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JL Audio RD500/1 reviews

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It's great

Crutchfield customer from Quebeck, TN on 8/13/2019

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I paired this with the JL Audio 8" sub and boy do they sound incredible. The amp is super compact, fit under the passenger seat of my 2 Door Wrangler, stays cool and does an amazing job driving my sub.

Pros: It's great

Cons: Expensive

Crutchfield response on

1 of 1 found this helpful

JL Audio RD500/1

Crutchfield customer from Liberty, MO on 8/12/2019

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sounds great with nice features.

Pros:

Cons:

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0 of 0 found this helpful

Big Power, Small Size

Crutchfield customer from Las Vegas, NV on 6/13/2019

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Earlier this year I added bass to my daughter's IS250 and I selected this amp to power the 12. Now that I am redoing my own system I have once again chosen this amp to power my sub. It has plenty of power and a small footprint. The built-in crossover has the range that I want and I have added the optional remote bass control to both systems for adjustability on the go. Next for me is fabrication for my highs and a 4 channel JL RD400 to run them.

Pros: powerful, small, crossover, ample sized connections

Cons: none so far

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0 of 0 found this helpful

Perfect for a JL W6 10'

Crutchfield customer from Santa Barbara, CA on 5/18/2019

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Awesome amp. Purchased this one because my 13 year old slash 500/1 decided to stop working properly. Small size,nice looking, nice power makes clean sound. It's pushing a 10' w6 pro wedge nicely.

Pros:

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0 of 0 found this helpful

JL Audio RD500/1

Nick from Missouri City, TX on 5/13/2019

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This amp rocks! More than enough power to power my 2 JL 12TW3's. The price point is incredible for the JL quality . The clip indicator helps and is easy to set.

Pros: Power, price, looks, clip indicator

Cons: None

Crutchfield response on

1 of 1 found this helpful

JL Audio RD500/1

Crutchfield customer from Kansas City, KS on 3/27/2019

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This amp is amazing. Great power and sound for it being a 500. Im powering a JL 10 w6 and it makes it thump hard with the knob only at 1/2

Pros:

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2 of 2 found this helpful

JL Audio RD500/1

Crutchfield customer from Newark, OH on 3/22/2019

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Have not had a chance to get this beautiful amp installed yet...work too much! The purchase was easy and the delivery was super simple! I have also purchased the RC-b1 bass remote. once I get everything installed I will circle back with an update

Pros:

Cons:

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0 of 0 found this helpful

10/10 will buy again

Crutchfield customer from Baltic, SD on 1/15/2019

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Amazing quality, very crisp sound from the single 10" sub In my crew can. Definitely buying the RD1000 for my other set up.

Pros: Sleek design, easy install, easy customer service, fast shipping.

Cons:

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0 of 0 found this helpful

Great amp

Mike from Canyon Country, CA on 5/9/2018

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I paired this amp with a stealth box like some other people have done and I am blown away by the sound it sounds perfect pushing one 10 shallow mount and it hits hard I'm very pleased

Pros: Awesome performance decent price and the jl warranty plus it's not big in size

Cons: None

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4 of 4 found this helpful

JL Audio RD500/1

Crutchfield customer from Battle Creek, MI on 1/16/2018

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Great AMP can't beat JL Audio

Pros:

Cons:

Crutchfield response on

2 of 3 found this helpful

JL Audio RD500/1

Jeremiah from Las Vegas, NV on 5/25/2017

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Works perfect with my Jl 10" shallow sunwoofer.

Pros: User freindly, easy to mount and wire up, doesn't get hot

Cons: None

Crutchfield response on

5 of 6 found this helpful

JL Audio RD500/1

Chad from Dalhart, TX on 4/24/2017

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Great sounding amp and the instructions on setting the gain using the "clipping" LED makes it easy to set.

Pros:

Cons:

Crutchfield response on

2 of 2 found this helpful

Great sound from JL audio

Jason from Pearland, TX on 4/12/2017

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I'm glad I went with the RD500 my Jeep Wrangler sounds amazing!

Pros: Its JL audio Great quality

Cons: None

Crutchfield response on

2 of 2 found this helpful

Sexy and High Tech Amp

ToyoTech300 from Katy, TX on 4/9/2017

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Low profile, clean sound, stays cool it's powering my 10" Rockford Fosgate p3 with exceptional sound and SPL, does not need a remote wire if you choose from two of three turn on settings, and with JL rca adapter it does not need a line output converter , this makes for simple wiring and less bulk, at 2ohms it makes you feel like you have more than the mentioned power!

Pros: Simple wiring options, top of the line technology, stays cool, doesn't make lights dim, exceptional sound for the price, looks awesome

Cons: None

Crutchfield response on

5 of 5 found this helpful

JL Audio RD500/1

Crutchfield customer from New Rochelle, NY on 4/1/2017

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Packs a punch. Nice small amp.

Pros:

Cons:

Crutchfield response on

2 of 2 found this helpful

Does what it says

Mario from Texas on 2/4/2017

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Great JL amp, powering a JL HO 10 and boy does it make the sub sing.... It is juicing it up exactly as I thought it should so I'm happy with my purchase, no dimming lights when I turn up the boom and the amp is just lukewarm even after 2 hours of testing music. Easy installation and after coming from a JL Slash 500/1 which is probably a better amp, I actually cannot tell the difference in power. For the price the amp is phenomenal. In the nineties they used to say " a dollar per watt" and usually if you paid that much u knew you were getting a great amp. So I cannot believe at this price that this amp is so clean and powerful. Nice to know quality car audio has finally gone down in pricing. The small footprint almost fooled me but I was wonderfully surprised when my installer said step ito your vehicle.

Pros: Easy installation Low power draw, great big bass, knobs for all your tweaking needs Bass knob support (get one!) Small footprint

Cons: I really don't have any, it does everything I intended at this price it's phenomenal

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12 of 12 found this helpful

Compact Powerful Amp

Donald from Garner, NC on 1/29/2017

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I purchased this amplifier to drive a JL Audio Stealth Box in my 2017 Mustang GT. Sadly, the first one I received was defective but Crutchfield promptly sent out a replacement and I was up and running in no time. This is a really nice compact amplifier with more than enough power to drive my single 12" JL Subwoofer. The amplifier is capable of high level input but I an using an Audio Control processor to take the high level down to pre-amp level and the output from this amplifier is so clean you would never believe that you were listening to a factory driven system.

Pros: Small, Powerful

Cons:

Crutchfield response on

5 of 5 found this helpful

Great sound

Rogelio from Aspers Pa. on 1/9/2017

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Good products

Pros: Very good bass

Cons: None

Crutchfield response on

0 of 0 found this helpful

Great little amp

Keith from Columbus, OH on 11/28/2016

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Great amp. Looks really nice. Nice power. Killer blue light.

Pros: Looks nice. JL quality, nice simple industrial design

Cons: Wished hex screws were a little larger. I'm afraid I'm going to strip them.

Crutchfield response on

2 of 2 found this helpful

Best amp I have owned

Matt from Memphis, TN on 10/13/2016

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This is my first time owning a JL product, and I am thoroughly impressed. The amp stays cool and has absolutely 0 trouble driving my current setup. I do not have access to a dyno, but I believe this amp does more than rated, which is always a huge plus. Also the tiny form factor allows it to fit in various places if your car is limited on space. One final plus about this amp is that adjustments are made by simply removing the top cover on the amp. Most brands have the adjustments on the side, which can make it tough to set up. This is the best amp I have owned. I cannot wait to put in my Memphis 12s I got from Crutchfield.

Pros: Easy Adjustment, Small form factor, excellent great dissipation, powerful.

Cons: None

Crutchfield response on

1 of 2 found this helpful

very happy

JJ from Dickinson, ND on 9/8/2016

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this amp does exactly what it sells, Easy hook up to a OEM head unit. The remote turn-on from the signal input works very well and the line input sounds very clean for not having a line-in processor installed. I hooked this amp up to a JL Audio Stealthbox and it sounds excellent! The amp runs cool and it does not draw heavy on the electrical system. The LED bar is a nice feature, along with the cover that hides the controls. Having the connections all on one side also makes sense. The JL emblem comes unattached so no matter which way you mount the amp you can attach the emblem so it looks correct. I also recommend the remote dial for adjusting the level on the fly.

Pros: The RD500/1 does exactly what JL advertises.

Cons:

Crutchfield response on

6 of 6 found this helpful

Good price, good amp

Chris from Phoenix, AZ on 6/13/2016

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Bought the amp to power a jl truck wedge CS110TG-TW3. More than enough power and was simple to set up. I was willing to try the new series of amps and was not disappointed.

Pros: Easy to connect and set up.

Cons: None for me. Worked great for my application.

Crutchfield response on

9 of 10 found this helpful

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Pros:

Cons:

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<< >>

Product Research

Features
Controls
Connections

Features

RD Series: The JL Audio RD series amplifiers feature big audio performance from a small footprint. With exclusive NexD switching technologies, the RD amps run cooler than most other amplifiers. Because the RD amps employ smaller cast alloy heat sinks, they can be installed in smaller spaces. RD amplifiers feature a black powder-coat finish with a brushed aluminum cover for the controls.

Mono Class-D Amplifier: The RD500/1 is a Class-D mono amplifier, designed specifically for powering subwoofers. The amplifier is stable down to 2 ohms, and has the following power output:

  • 250 Watts RMS x 1 channel at 4Ω at 14.4V (225 W RMS at 12.5V)
  • 350 Watts RMS x 1 channel at 3Ω at 14.4V (300 W RMS at 12.5V)
  • 500 Watts RMS x 1 channel at 2Ω at 14.4V (400 W RMS at 12.5V)

Differential-Balanced Inputs: The RD500/1 features differential-balanced input architecture to effectively control noise and ensure compatibility with a wide variety of source units, including many OEM systems. Without resorting to line output converters, you can directly connect most OEM source units to the amplifier without creating any noise or compatibility issues. Unlike conventional single-ended inputs, the differential-balanced design does not connect one side of the audio signal to chassis ground. This eliminates any voltage sensitivity between one input terminal and ground and greatly reduces the incidence of alternator whine in a typical car audio installation.

Note: You will need a Speaker Wire to RCA adapter (sold separately) to connect this amplifier to your head unit via speaker level.

Protection Circuitry With Status Indicator Lights: The amp features a bi-color LED light strip on the top panel of the amplifier to indicate the amplifier's operating status:

  • Temporary Red: When the amplifier is powering up, the light strip turns red for 3 seconds and audio output is muted.
  • Constant Blue: The LEDs light blue to indicate that the amplifier is turned on and operating normally.
  • Constant Red: The LEDs light constant red to indicate that the amplifier has exceeded its safe operating temperature, putting the amplifier into a self-protection mode, which mutes the power output of the amplifier. The red LEDs will shut off and the amplifier will return to normal, full-power operating mode when the temperature drops back to a safe level.
  • Momentary Red: The light strip will light red for 1/2 second and the output will be muted to indicate that an over-current condition has occurred. Over-current condition can be caused by a speaker impedance lower than the optimum load impedance range for the amplifier or a short-circuit in the speaker wiring.
  • LEDs Off: The only condition that will shut down an undamaged RD500/1 completely is if battery voltage or remote turn-on voltage drops below 10 Volts. The amplifier will turn back on when voltage climbs back above 11 Volts.

Cooling System: The outer shell of the JL Audio amplifier is designed to remove heat from the amplifier circuitry. For optimum cooling performance, this outer shell should be exposed to as large a volume of air as possible.  Enclosing the amplifier in a small, poorly ventilated chamber can lead to excessive heat build-up and degraded performance.

Controls

Control Panel Cover: The RD500/1 features a brushed aluminum Control Panel Security Cover which protects and hides the amplifier's controls. When installed, the cover ensures that the amplifier's settings are not accidentally changed while creating a clean aesthetic look for the amplifier and your installation. The control panel security cover is pre-installed at the factory and must be temporarily removed to access the amplifier's controls. The security cover screws can be removed with the supplied 2.5mm Allen wrench.

LED Clipping Indicators: The amplifier is equipped with an onboard LED clipping indicator which let you quickly and accurately set the amp's input sensitivity without special equipment. The simple, 7-step procedure using a Test CD and a screwdriver properly sets the input sensitivity to its optimum level.

Flexible Input Section and Active Crossover Network: The RD500/1 amplifier provides a flexible input section and a comprehensive crossover network to fine tune your system effectively and accurately. The amp is equipped with a 12 dB/octave Butterworth low-pass filter with a rotary control to select the cutoff frequency between 50Hz and 500Hz. There are additional markings at 60Hz, 80Hz, 120Hz, and 200Hz. You'll need a small screwdriver (not included) to set the frequency.

Turn-on Options: The Turn-on Mode Switch lets you choose the method for turning the amplifier on and off:

  • +12V Remote Turn-on Lead: The preferred method for turning the amplifier on and off is by running a turn-on lead from the source unit and connecting it to the Remote terminal. When +12V is present at the terminal, the amplifier will turn on. When the +12V is turned off, the amplifier will shut off. The set screw connector on the Remote terminal will accept 18 AWG to 12 AWG wire.
  • DC Offset-Sensing: The amplifier will turn on and off when the presence of a very small DC signal (or offset) is detected on the amp's RCA left channel input. The amplifier will turn off when this DC Offset is no longer present. This method is designed for high-level (speaker-level) input signals, not for low-level (line-level) signals.
  • Signal-Sensing: The amplifier will turn on and off by detecting the presence of a full-range audio signal at the left-channel input. The amp will turn off approximately 30 seconds after the audio signal is no longer detected. This method is designed for use with high-level (speaker-level) input signals and not for low-level (preamp level) signals.
Note: When the DC Offset or Signal Sensing turn-on methods are being used, the amp's Remote terminal can be used as a remote turn-on output for other amplifiers or accessories in the system.

Input Voltage: The amp will accept a wide range of signal input voltages, from 200mV to 8V. The range is split into two sub-ranges: "Low" for preamp level signals from 200mV to 2V, and "High" for high-output preamp level signals and speaker level signals from 800mV to 8V.

Connections

Power/Ground/Turn-On Terminals: This JL Audio RD amplifier features set screw clamp terminals for the power, ground, and remote turn-on connections. A 2.5mm hex-wrench is supplied for tightening or loosening the set screws.

  • Power and Ground: The amplifier's set screw clamp Power and Ground connections are designed to accept up to 4 AWG power wire, as recommended by the manufacturer.
  • Remote Turn-On: The amplifier's set screw clamp turn-on lead will accept 18 to 12 AWG wire.
Note: The Amplifier is not equipped with a fuse. An external 50-amp AFS, AGU, or MAXI fuse must be installed on the power wire. If a wiring kit is used which includes a fuse with a value other than 50 amps, the original should be replaced with a 50-amp fuse.

Speaker Output Terminals: The JL Audio RD500/1 features four set screw clamp speaker terminals for an easy parallel subwoofer connection. (They are not stereo outputs.) The terminals will accept 16 to 8 AWG speaker wire.

Preamp Inputs: The amplifier features one set of differential-balanced RCA jack inputs with an Input Voltage switch and rotary Input Sensitivity control. The amplifier's input voltage range is 200mV-2V (LOW) and 800mV-8V (HIGH).

Preamp Outputs: The RD500/1 incorporates a buffered pass-through preamp output section, so that additional amplifiers can be easily added to the system. The preamp output signal is not affected by the amp's crossover networks. The pass-through preamp output delivers the same signal that is connected to the preamp input.

Remote Level Control: The amplifier features a standard RJ-14 telephone connector for adding the optional RBC-1 Wired Remote Bass Controller (sold separately). The Remote Bass Controller lets you control the volume of the RD500/1 from the driver's seat.

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Customer Q&A

Q
Crutchfield asked: Why did you buy this?
A
I had this same amp in my car and loved it. [ A  Feb 07, 2019 ]
A
For me it's about quality. I have JL Audio sub enclosure...HO with single 10. Outrageous sound out of a small but mighty box. This new amp is exactly what I need. [ Mark  Nov 08, 2018 ]
A
perfect fit for 2016 tundra crewmax [ gary  Sep 30, 2018 ]
A
Clean looks and JL is my favorite brand of subs and amps. Bullet proof and always work. [ David  Sep 17, 2018 ]
A
Not enough bass from my car speakers [ Fred  Sep 14, 2018 ]
A
love jl audio they are the BEST. [ Ken  Aug 01, 2018 ]
A
Ive got a HO JL enclosure with 2 10W3v3-4 that has a final impedance of 2 ohms that I'm currently powering with an older Slash series 250/1. I think it is under powering the subs. Have a 4 channel Older slash series 4 channel amp that is running my doors. [ Zachary  May 20, 2018 ]
A
I had an older model JL audio 500/1 amp installed and the new one uses the same remote gain knob connection as well as the fact that all the wiring connections are in the same locations. [ Chris  Oct 17, 2017 ]
A
NEEDED AMP FOR A SUB AND WANTED TO STICK WITH THE RELIABILITY OF JL !! [ Jerald  May 31, 2017 ]
A
I like jl audio products [ ADRIAN R  Mar 18, 2017 ]
A
Crutchfield recommendation [ Djclutch  Mar 07, 2017 ]
A
QUALITY MONO AMP SIZED FOR SUB BOX....ACTUAL MAX RANGE COMPARBLE TO SPEAKER MAX RMS [ C  Jan 30, 2017 ]
A
because i saw the reviews and I'm convinced [ Rogelio Saldana  Dec 26, 2016 ]
A
matches perfectly with jl audio 12w6v3-4 [ Damien  Oct 28, 2016 ]
SHOW MORESHOW LESS

3 questions already asked

Q
will this amp power 2 12" jl 12wo in a sealed enclosure?
[ jason  May 29, 2019 ]
6 answers
A
no, amp will power only one. I probably should have gone with a stronger amp even for my 1 jl I have it pushing. I have the gain all the way up. one thing about the amp is it never over heats or stops playing
[ jonathan  Jun 06, 2019 ]
A
Yes it will
[ Ken  Jun 06, 2019 ]
A
Yes it will.
[ TONY  Jun 06, 2019 ]
A
Of course. I have it on 2 12w3v3's and it has no problem running them.
[ Joel  Jun 06, 2019 ]
A
meant to type JL HO Box
[ Zachary  Jun 06, 2019 ]
A
Absolutely, great amp. I have had it for almost a year now and sound is phenomenal and clear. I have mine pushing 2 10w3's in a I'll HO box
[ Zachary  Jun 06, 2019 ]
Q
What's the main difference with this model vs. the JX500/1D?
[ Mr.  Nov 24, 2017 ]
1 answer
A
JX500/1D is only a basic mono amp lacking the features found in rest of their line up. RD has JL's NextD switching technology & Differential Balanced Inputs both of which increases sound quality.
[ Paul  Nov 24, 2017 ]
Q
Will this amp be enough power for a jl tw5v2?
[ Vato_drummer  Jul 24, 2017 ]
1 answer
A
Thanks for your question. For information on selecting the best amp for your sub I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They will be able to help determine the differences between the amp models and help you make the best choice for your system.
[ Kenny  Jul 25, 2017 ]  Staff

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