Remote level controller for select JL Audio amplifiers

Item #: 136HDRLC

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21 Reviews

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The HD-RLC remote level controller works with JL Audio's HD Series and XD Series amplifiers and many marine amps, allowing you to manage your level settings from the front of your vehicle. The HD-RLC adjusts your amplifier's level, not its "bass boost," so you maintain the same bass quality as you turn the volume up and down.

It works equally well with subwoofer and full-range amplifiers, and you can control multiple amplifiers with just one remote by adding standard phone cable splitter (not included). When used with the HD600/4 4-channel amplifier, you can assign it to control all channels, or the rear channels only.

Product Highlights:

  • remote level controller for JL Audio HD series amplifiers
  • rear or full-range channel assignment with HD600/4 4-channel amp
  • multi-amp capable (standard phone cable splitter required — not included)
  • warranty: 1 year
  • Our 60-day money-back guarantee

See All Car Amplifiers that work with this item

Hands-on research

What's in the box?

Download owner's manual

  • Remote level control knob with attached 9" cord terminated by a female RJ-11 plug
  • 18' Cord terminated by a male RJ-11 connector on each end
  • 2 Flat washers
  • 2 Nuts

Product Research


Overview: The JL Audio HD-RLC Remote Level Control is compatible with JL Audio HD and MHD series amplifiers. The HD-RLC attenuates the level of JL Audio HD and MHD amplifiers equipped with a Remote Level Control connector. The HD-RLC can be used as a true subwoofer level control or as a master volume control. Multiple amplifiers can be controlled with one HD-RLC by adding a standard phone cable splitter (sold separately).

Note: The HD-RLC is not compatible with JL Audio amplifiers which feature a Remote Bass Port. In this case you would need the JL Audio RBC-1 controller, sold separately.

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JL Audio HD-RLC Reviews

Average Customer Review:

21 reviews
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JL audio performance

Written By Stan, FAirbanks ak on Thursday, March 12, 2015

Crutchfield Customer Review (What's this?)

Awesome accessory to any JL hd amp


Written By c4, Charlotte, NC on Sunday, November 02, 2014

Crutchfield Customer Review (What's this?)

Simple to install and provides the remote level control for the subwoofer I was looking for. The knob base is nice and small, and was able to install the knob/base in a factory blank switch location for a very custom/integrated look. Highly recommended for any sub-amplifier installation.

Pros: Small size to accomodate factory switch locations. Simple connectivity, plug and play.

Cons: None, other than it should just come with the amp.

Awesome product

Written By B money, Waukee IA on Tuesday, October 14, 2014

Crutchfield Customer Review (What's this?)

The product is awesome works really good, you don't need to go into your settings to change the power of the bass

Okay, but Expensive

Written By Kyle K, on Wednesday, September 03, 2014

It's a knob to control the gain on your amp - use it to change your bass response for different types of music. I agree with Joe M in such that the first 50% you turn the knob it sounds like nothing is happening, turn it at 75% you can feel it a bit and 100% its working full power. Kinda expensive for just a knob but I wanted one, I also have it paired with an XD600/1.

Crutchfield was great though - ordered it and it was delivered to my door in less than 24 hours which was awesome.

Nice to have

Written By Brian, Sacramento, CA on Tuesday, August 19, 2014

Crutchfield Customer Review (What's this?)

Not much bad to say. It's a knob. Decent quality. It's always nice to have a knob to control bass, every song may have different bass volume taste for listeners. This makes it easy to turn the bass up and down.

I have the JL XD600/6v2. The knob can control 6, 4 or 2 of the channels.

Pros: Convenient bass control.

Cons: Little expensive for a knob and phone cord.


Written By Nigel, Orlando on Saturday, August 16, 2014

Crutchfield Customer Review (What's this?)

Great product lets me be on control of how loud I like it without changing all of the EQ settings

Pros: Small

Not sure if this was worth the buy yet

Written By Joe M, Philadelphia, PA on Monday, July 14, 2014

Crutchfield Customer Review (What's this?)

I had my XD 600/1 in my previous car and I always wanted to get this controller for those songs that are heavy on the bass. The installation was very straight forward, even though the threads are a little flimsy. The range of control though seem very limited. With the slightest turn, the amp output seems to be normal, very low or off.

Pros: easy installation

Cons: limited range of control


Written By Jose B, Simi Valley, CA on Wednesday, June 25, 2014

Crutchfield Customer Review (What's this?)

This level controller is great! It's easy to install and looks good.

Pros: Ease of install

Cons: None

All good

Written By Peczenij, Bethlehem, PA on Thursday, December 19, 2013

Crutchfield Customer Review (What's this?)

JL Audio is a premium product, and so it this accessory

Pros: Works as intended.

Cons: None

Works as intended.

Written By shillydwawgon, Denver, CO on Tuesday, December 17, 2013

Crutchfield Customer Review (What's this?)

Replaced a JL 500/5 and this perfectly replaced the RBC-1 control, using the same hole and cable.

Pros: Remote subwoofer attenuation.

Cons: A wee bit pricey.


Written By Truck, Linden, NJ on Friday, August 30, 2013

Crutchfield Customer Review (What's this?)

Great product, having the ability to raise or lower the bass from the simple turn of a knob. Simple install.

Pros: small, easy install, don't have to go into menu to adjust bass

Cons: none

Amp Knob

Written By Anonymous, Corpus Christi, TX on Wednesday, August 28, 2013

Crutchfield Customer Review (What's this?)

Works great. A little pricey but it's nice to be able to turn the bass up or down per song. Very convenient. Plenty of cord. Easy to mount. Great Buy

Works as advertised

Written By JepAlan, Midwest on Thursday, July 25, 2013

Crutchfield Customer Review (What's this?)

Use this to control bass level on my XD/600/6. Easy to integrate and works great, but wish it had a beefier feel to it and wish they had other knob choices. Expensive for what it is.

Pros: Easy to install. Works great.

Cons: Expensive. Feels "fragile".

Great Product

Written By jmw, Walkerton, Va on Tuesday, June 04, 2013

Crutchfield Customer Review (What's this?)

This item is great to have a quick turn down of volumes. We use this in the boat cabin so we can turn off the music in the cabin but still keep the party going outside. Great product and works simple..

Pros: Easy to install and works great

Cons: Need to make sure you know what you want to adjust first as set up wrong levels first.


Written By Tom G, Reno, NV on Thursday, May 30, 2013

Crutchfield Customer Review (What's this?)

I had this controller installed with my HD900/5 amplifier and an Alpine Type R thin mount 10 inch subwoofer. Having the control know allows you to very easily adjust the bass levels as sources - or even songs change. Does exactly what it's supposed to do, and it's compact enough so that it doesn't clutter your dash.

Pros: Works as described; compact and clean looking

Cons: None


Written By Anonymous, wakeeney ks on Thursday, March 07, 2013

Crutchfield Customer Review (What's this?)

i like the JL Audio HD-RLC alot because it is very convinent when i take my wife and girls for a drive in my truck because i can turn my amp down in a flash with the turn of a knob

1998 BMW M3

Written By hjsna, Rockledge, FL on Thursday, August 23, 2012

Crutchfield Customer Review (What's this?)

I ordered the JL XD 700/5 amp for my 1998 BMW M3 which I use for my business and ordered this remote switch. It is excellent, I can adjust the bass quickly without messing witht the head unit. It's great when you are listening to different types of music. It mounts stealth by my alarm warning light in the console. Other brands the switch is too big to mount stealth. I highly recommend!!

Pros: quick install, compact

Cons: Wish it came free with the amp.

Great for multiple source users

Written By Phantasia, Boone, NC on Monday, May 07, 2012

Crutchfield Customer Review (What's this?)

If you listen to multiple sources, FM, XM, CD, iPhone, it really does come in handy with keeping the levels within a good range. I think you can achieve the same results through the head unit, but its going to require several taps to the screen and distractions from the road as opposed to a quick turn of a little knob that you don't even have to look at.

Works for me

Written By Jimbobengineer, Prescott, AZ on Monday, February 06, 2012

Crutchfield Customer Review (What's this?)

This should have come with the XD600 amp. This knob is meant to be mounted through some fairly thin material. Pull real hard and the knob comes off. There will need to be a small clearance behind the knob to hide the black square part of the unit. It's smaller than 1in x 1in.

Pros: Works to adjust bass level quickly

Cons: No surface mount options. The fact this doesn't come standard with a $400 amp is ridiculous.

You Want It

Written By Heck35, McCurtain County, OK on Tuesday, May 10, 2011

Crutchfield Customer Review (What's this?)

I'm not sure this gadget is absolutely necessary, but it certainly makes switching between FM, XM, and the iPod, with their different sound levels, easy. If you're spending hundreds on an amp, a few extra bucks can make it sound twice as good.

Essential item for me

Written By kontai69, Vacaville, CA on Sunday, April 17, 2011

Crutchfield Customer Review (What's this?)

I'm constantly adjusting the subwoofer output on my amp and require this
remote control module to do so. I'm using the factory headnit so I can't control
the sub output any other way (excluding adjusting the amp gain). The control
module is small enough (around 1 cubic inch) so it can fit it tight spaces. I have
it mounted inside the steering column cover of my Honda CR-V for easiest and
quickest access as well as factory look. The control is well made and has a very
smooth feel when turned.

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