Rockford Fosgate RF-HLC4 4-Channel High-to-Low Converter
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Rockford Fosgate RF-HLC4 4-Channel High-to-Low Converter

SKU: RFHLC4
5.0 (1)
Sale price
$67.15
Regular price
$79
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15%
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Shipping information

We offer fast and reliable shipping options to ensure that your order arrives in a timely manner. Our dedicated team works diligently to process and ship your items as quickly as possible.

Here are some key points to note about our shipping policy:

Standard Shipping

  • Frankies offers a $15.95 flat rate for Australia-wide shipping, no matter how many items you order. Some larger or heavier items may incur an additional fee, which will be communicated to you when your order is processed.
  • While we endeavour to dispatch all orders promptly, please be advised that due to the current national fuel shortages in Australia and the resulting pressure on logistics networks, order processing and dispatch may take up to 7 business days. We are not liable for delays caused by third-party freight carriers or fuel-related logistical disruptions. By placing an order, you acknowledge that delivery timeframes may be extended beyond our standard estimates during this period.

Estimated delivery times:

  • WA, NT, and TAS: currently experiencing longer shipping times
  • Holiday periods (e.g. Christmas): deliveries may be delayed due to increased freight volumes

Express Shipping

  • Express shipping is available and calculated based on your delivery location, as well as the size and weight of your order. To receive an accurate quote, please contact our Albion Park Rail store and request an "express shipping quote." Our team will promptly assist with pricing and availability. Payment for express shipping can be securely arranged over the phone.

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Product features

4-Channel High-to-Low Line Output Converter Front and Rear 10.5V Input, 3V RCA Output, 25 × 76 × 89mm. For Factory and Aftermarket Radios Without RCA Outputs.

Product Overview

The Rockford Fosgate RF-HLC4 is a 4-channel line output converter (LOC) the 4-channel counterpart to the RF-HLC. Where the RF-HLC provides 2-channel (stereo) conversion for a single amplifier, the RF-HLC4 provides separate front and rear channel outputs enabling front/rear fade control or connection to a 4-channel amplifier from a factory or aftermarket radio without RCA preout jacks.

The RF-HLC4 accepts separate front left/right and rear left/right high-level speaker inputs (each with their own ground lead), and outputs four RCA jacks (front left/right and rear left/right) at up to 3V. Input voltage: up to 10.5V. Behind-dash mounting. Warranty confirmed for authorised dealer purchases.

Key Specifications

  • Part number: RF-HLC4
  • Type: 4-channel line output converter (LOC) ✓
  • Channels: 4 (Front L/R + Rear L/R stereo) ✓
  • Input connections: Front L+/-, Front R+/-, Rear L+/-, Rear R+/-, Front ground, Rear ground ✓
  • Input voltage: Up to 10.5V ✓
  • Output connections: Front Left RCA, Front Right RCA, Rear Left RCA, Rear Right RCA ✓
  • Output voltage: Up to 3V ✓
  • Mounting: Behind the dash ✓
  • Dimensions: 1" × 3" × 3-1/2" (25.4mm × 76.2mm × 88.9mm) ✓
  • Warranty: Confirmed (authorised dealer purchase required — terms TBC)

Features & Benefits

  • 4-Channel — Front and Rear Independent Conversion Separate front and rear channel inputs and outputs allow independent signal paths for front and rear speaker zones — enabling fade control at the amplifier and the ability to connect front and rear amplifier channels independently.
  • Separate Front and Rear Ground Leads Dedicated ground leads for the front and rear input circuits help minimise ground loop noise independently in each channel pair — reducing the risk of hum from shared ground paths.
  • 10.5V Input / 3V RCA Output Same voltage specifications as the RF-HLC — up to 10.5V high-level input, up to 3V RCA output. Suitable for factory OEM and aftermarket head units without RCA outputs.
  • Behind-Dash Mounting — Compact LOC Footprint At 25.4 × 76.2 × 88.9mm, the RF-HLC4 is wider than the RF-HLC (25.4 × 39.7 × 88.9mm) to accommodate the additional 4-channel wiring, but maintains the same behind-dash mounting profile.
  • Factory and Aftermarket Radio Compatible Suitable for both factory OEM and aftermarket head units without RCA preout jacks.

Technical Specs

Specification Detail
Brand Rockford Fosgate
Part Number RF-HLC4
Type 4-Channel Line Output Converter (LOC) ✓
Channels 4 (Front L/R + Rear L/R) ✓
Front Input L+/-, R+/- + Ground lead ✓
Rear Input L+/-, R+/- + Ground lead ✓
Input Voltage Up to 10.5V ✓
Front Output Left RCA, Right RCA ✓
Rear Output Left RCA, Right RCA ✓
Output Voltage Up to 3V ✓
Mounting Behind the dash ✓
Dimensions 25.4 × 76.2 × 88.9mm (1" × 3" × 3-1/2") ✓
Warranty Confirmed (authorised dealer) — terms TBC

Compatible With / Goes Well With

Suitable for:

  • Factory and aftermarket radios without RCA preout jacks — 4-channel output
  • 4-channel amplifiers requiring front and rear RCA inputs
  • Systems requiring separate front/rear signal paths for fade control

Pairs well with:

  • Rockford Fosgate RFI or RFIT series RCA cables (front and rear runs to amplifier)
  • Any 4-channel amplifier with front and rear RCA inputs

Frequently Asked Questions

What is the difference between the RF-HLC4 and the RF-HLC?

Both are line output converters with identical 10.5V input and 3V output voltage specifications. The RF-HLC is 2-channel (stereo); the RF-HLC4 is 4-channel (front and rear stereo). Choose the RF-HLC4 when connecting to a 4-channel amplifier or when separate front and rear signal paths are required.

Why does the RF-HLC4 have two ground leads?

The RF-HLC4 has separate ground leads for the front and rear input circuits — reducing the risk of ground loop noise between the front and rear channel pairs, which can be introduced when both share a single ground reference.

Can the RF-HLC4 handle factory head unit output voltages?

Yes — the 10.5V input tolerance covers the range of most factory OEM head units (typically 2–8V at the speaker terminals) and aftermarket head units.

Is the RF-HLC4 covered by warranty?

Yes — Rockford Fosgate's warranty is confirmed active. Coverage requires purchase from an authorised dealer. Confirm the specific warranty period with your authorised reseller at time of purchase.

Do I need an RF-HLC4 if my amplifier already has high-level inputs?

If your amplifier already accepts high-level (speaker-level) inputs directly — such as the Rockford Fosgate TM750X1bd or TM1000X5ad — a separate LOC is not required. The RF-HLC4 is needed when the amplifier only accepts RCA inputs and the radio has no RCA outputs.