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Rockford RF-HLC4

4-channel line output converter

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  • Rockford RF-HLC4

    RF-HLC4 line output converter

  • Rockford RF-HLC4

    Input panel (harness included)

  • Rockford RF-HLC4

    Output panel

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Our take on the Rockford RF-HLC4

by Buck Pomerantz
Rockford Fosgate

Small enough to fit behind your dash and never needs adjusting

When you want to add an amplifier to a car stereo that doesn't have RCA-type outputs, Rockford Fosgate's HLC4 4-channel line output converter may be the perfect solution. The HLC4 converts the high-level signal from your receiver's speaker-level outputs down to low-level signals that your amp can handle. This compact converter will fit just about anywhere.

See more info on this item

Highlights:

  • 4-channel line output converter
  • input: up to 10.5-volt (about 27 watts)
  • output: up to 3 volts
  • includes ground leads to reduce noise if necessary
  • dimensions: 4-15/16"W x 1-1/16"H x 3-1/16"D
  • warranty: 1 year
  • Our 60-day money-back guarantee

Hands-on research from the Crutchfield Labs (what are the Labs?)

Product Research
What's in the box?

Download owner's manual

  • 4-Channel high-level to low-level signal converter
  • 12" Speaker-level harness
  • Instructions on packaging

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 open the box, verify contents, 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.

Features

4-Channel High-Level to Low-Level Converter: The Rockford Fosgate RF-HLC4 is a 4-channel high-level to low-level signal converter designed for factory or aftermarket radios that do not have dedicated low-level RCA outputs. The adapter converts high-level signal from the radio's speaker line and transforms it into a safer low-level audio signal. This allows you to add a 4-channel amplifier to your system for higher power output and better sound quality.

Speaker Level Input: The Rockford Fosgate RF-HLC4 comes with a 9-wire speaker-level harness which plugs into the converter's 10-pin connector. The speaker-level harness will need to be spliced or crimped onto your head unit's wiring harness (splicing and crimping accessories sold separately). The RF-HLC4 has an input voltage of up to 10.5V.

Pin # Wire Color Function
1 Green/black LR-
2 Green LR+
3 Open (none)
4 Gray RF+
5 Gray/black RF-
6 Purple/black RR-
7 Purple RR+
8 Black Ground
9 White LF+
10 White/black LF-
Note:Connecting the Ground lead (black) is not necessary unless there is noise in the audio system.

Low Level Output: The Rockford Fosgate RF-HLC4 is fitted with 4 RCA jacks (Front Left/Right, Rear Left/Right). These RCA jacks connect to your aftermarket amplifier via stereo RCA cables (sold separately). The RF-HLC4 has an output voltage of up to 3V.

Mounting Options: The 4-channel high-level to low-level signal converter should be installed behind the vehicle's dash and car stereo.

 
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Rockford RF-HLC4 Reviews

Average Customer Review:

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4 out of 5

rockford rf-hlc4

Written By jp, reno,nv on Sunday, May 25, 2014
Crutchfield Customer Review (What's this?)
 
got this to hook up factory stereo with 5 channel amp for new speakers and sub. worked very well. ran jumper from rear speakers to sub, adjust gain, adjust fade works very well. would recommend this as a very cheap and easy way to amp your factory radio
Pros:
works good, inexpensive, easy to hook up
Cons:
none so far
Was this review helpful?    Yes | No
 
5 out of 5

Great product

Written By Anonymous, oklahoma on Sunday, February 23, 2014
Crutchfield Customer Review (What's this?)
 
This product was great. It was used to replace a cheap converter bought at walmart that produced a annlying gain tone. The ground cable and insulation took that tone away.
Pros:
Great quality Ground cable Well protected
Cons:
Large and in the way
Was this review helpful?    Yes | No
 
4 out of 5

Does what it needs to do.

Written By RB, Houston Tx on Sunday, December 29, 2013
Crutchfield Customer Review (What's this?)
 
I used this to connect a scion factory HU to a Kenwood 5 channel amp. Combining this with properly tuned gain settings on the amp, there is absolutely no distortion with the HU at max volume. I can't keep it there for long, though, for fear of hemorrhaged ears. The separate harness makes it easy to splice into the factory lines for a butterfingers like me. My only gripe is that the output levels are not adjustable. I learned the hard way that my head unit outputs the rear channels at a much lower voltage than the front - something that I was fortunately able to compensate for using the amp gain switches.
Pros:
Quality, ease of installation.
Cons:
Lack of adjustable outputs
Was this review helpful?    Yes | No
 

2 questions already asked

I want to hook up 1800 watt amp and 2 12inchsubs in a box what converter do i need? [ candy isaacks  Feb 25, 2014 ]
1 answer
  • For details on installation please contact an Advisor by phone (1-800-324-9695) or online chat. They will be able to give you the details on what you will need. [ Krissy Staff  Feb 26, 2014 ]
Does this converter has a Remote wire for your amps to turn off/on ? And can I used it for two amplifiers ?? [ Frank  Jan 14, 2014 ]
1 answer
  • No, the amp switch wire would not run through the converter. The switch wire(s) should be spliced directly to the switched 12v on the head unit. Using this for two amplifiers completely depends on your setup, and whether you want to amplify front and rear channels separately. Using a four channel amplifier combined with a separate mono amp for the sub? You can use this with two RCA "y" splitters put on either the front or rear channels. Two mono amps? Don't use this. Buy a two channel converter instead and split the signal on the RCA side. [ Ryan   Jan 14, 2014 ]

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For a more in-depth review and enhanced detailed information on the Rockford RF-HLC4, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_575RFHLC4/Rockford-RF-HLC4.html ).

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