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Remote level controller for select JL Audio amplifiers

Item #: 136HDRLC

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28 Reviews | 1 question - 7 answers

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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

JL Audio HD-RLC Reviews

Average Customer Review:

28 Reviews

Great addition to any JL amp

Written by: Utennessee from Tennessee on January 5, 2016

Crutchfield Customer Review (What's this?)

I call this the "Old Man Knob" I needed to add a little bass to my 2015 Jeep Wrangler and i added a Stealthbox from JL. This little 10" Sub packs a punch. I like to listen to my music at higher volumes without the sub shaking the car. With the "Old Man Knob" i can lower the sub level and enjoy without the rattling... and if you need the bass just turn the knob and its back... Great addition for driving with consideration of others.... If your into that...

Pros: Complete control of sub or overall sound levels at arms length

Cons: Mounting in some vehicles ( just drilled a hole in my dash and it looks factory) So not a con for me but could be difficult for other vehicles...

Simple Bass Solution

Written by: Manion from Florida on November 20, 2015

Crutchfield Customer Review (What's this?)

Great convenient way to control your bass from the top of your fingers!!

Pros: Easier than changing your AMP settings everytime!

Cons: None

Gotta Have It

Written by: Al from Virginia on November 18, 2015

Crutchfield Customer Review (What's this?)

Gotta have this if you buy the HD900 for maximum sound adjustment flexibility.

Pros: Small, phone cable is interchangeable with RBC-1, so you don't have to rewire if you are upgrading.

Cons: Knob should be metal for the price.

Nice Accesory

Written by: Dane from Kansas on October 2, 2015

Crutchfield Customer Review (What's this?)

Nice addition to my HD900/5 amp allowing me to dial down the amp from the front seat. When turned clockwise or to the "Max", the amp is at it's "normal" level setting as if you did not have the remote connected. When turned counter-clockwise or to the "Min", you are decreasing the output. It can be mounted with the supplied hardware for a clean, stealth look. Does exactly what it's suppose to do.

Pros: Does it's job. Stealth mounting capabilities with the supplied hardware.

Cons: It's an accessory & not included with the amp.


Written by: Everett P from Pennsylvania on September 15, 2015

Crutchfield Customer Review (What's this?)

It works good as a gain it lowered the bass it's good for intended use

Pros: If works well for what's it's made for

Cons: It's not a bass knob


Written by: Anonymous from California on September 7, 2015

Crutchfield Customer Review (What's this?)

Works perfect

Pros: JL quality

Cons: None

JL sub amp control knob

Written by: Mike C from Jefferson City, MO on April 12, 2015

Crutchfield Customer Review (What's this?)

Good shipping time. Good product

Pros: Looks nice. Works fine.

Cons: Clip is like a phone cord. Plastic piece broke off.

JL audio performance

Written by: Stan from FAirbanks ak on March 12, 2015

Crutchfield Customer Review (What's this?)

Awesome accessory to any JL hd amp




Written by: c4 from Charlotte, NC on November 2, 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 from Waukee IA on 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 September 3, 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 from Sacramento, CA on 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 from Orlando on 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 from Philadelphia, PA on 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 from Simi Valley, CA on 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 from Bethlehem, PA on 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 from Denver, CO on 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 from Linden, NJ on 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 from Corpus Christi, TX on 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 from Midwest on 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 from Walkerton, Va on June 4, 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 from Reno, NV on 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 from wakeeney ks on March 7, 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 from Rockledge, FL on 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 from Boone, NC on May 7, 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 from Prescott, AZ on February 6, 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 from McCurtain County, OK on 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 from Vacaville, CA on 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.



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.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Customer Q&A

Crutchfield asked  
Why did you buy this?

Perfect for adjusting amp level from the drivers seat. [ Robert  Feb 10, 2016 ]
to have control of the sub woofer at my finger tips for when my son is with me [ rodney  Feb 10, 2016 ]
The HD-RLC will allow me to turn off the subwoofer channel quickly without the need of going through the menu of the headunit. [ Richard  Jan 29, 2016 ]
This product works as designed well. However, you really don't need it if you have a SW control on your head unit or unless your running so much bottom end you can't control it through the head unit. [ JAMES A  Jan 27, 2016 ]

1 question already asked

This remote will only work with certain jl audio amps and what it does is control the subwoofer volume . Xd and hd series I have an xd series subwoofer amp and that is what I use it for. Most jl audio amps that have a dedicated subwoofer channel will have a jack for sub level control. Hope this helps. [ CLAUS I  Jul 28, 2014 ]
Im sure it will if the amp is designed to receive this remote [ ROD  Jul 28, 2014 ]
This remote is for JL Audio amps only. Ho many channels it will control depends on the model of amplifier you have. On my 6 channel amp, there is a switch on the amplifier that sets the remote level control for either 2, 4, or all 6 channels. Check the instructions for your JL Audio amp. [ JEFF A  Jul 26, 2014 ]
I am not positive. I would assume so. I use mine for my mono amp for my sub. But I will say it works great! Very convenient [ JEREL  Jul 26, 2014 ]
Yes it works on 2 or 4 channel and mono amps as well. Just make sure you get the right remote for your series amp. JL makes 2 different ones. [ CAMERON  Jul 26, 2014 ]
So this can be a used as a bass boost remote. controling only the woofers, or can be used a volume for all channels. I don't use a head unit, so I use this as a master volume. [ CHRIS  Jul 26, 2014 ]
Only work with 5 channel amp [ MARIO  Jul 26, 2014 ]

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