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Rockford Fosgate PLC-UUniversal Punch Level Control

5.03 reviewsSee all reviews

A plug-and-play inline level control that's very easy to install and delivers dependable performance. One reviewer reports using it with a Bluetooth receiver in an RZR to adjust volume while keeping their phone in their pocket.

Buyer confidence

88%

Highlights

  • 1 Year Warranty
  • Allows level adjustment of an audio signal
  • High quality audio potentiometer provides linear volume control over entire knob range
  • Panel mount option with large and small knob configurations

Key specs

Full specs
Mounting
Flush / Panel Mount (1" diameter) Under Dash / Center Console Rocker Switch Mount w/ 3.5mm Input Option Small & Large Knob Options
Gain
Unity Gain (Voltage In = Voltage Out)
Processor Type
Analog Processor
Signal Input
1 RCA Pair (left/right) Female Jacks 3.5mm Stereo Jack
Signal Output
1 RCA Pair (left/right) RCA Female Jacks 1 RCA Pair (left/right) Female Jacks for 3.5mm Input
Input Impedance
Output Impedance

Key specs

Full specs
Mounting
Flush / Panel Mount (1" diameter) Under Dash / Center Console Rocker Switch Mount w/ 3.5mm Input Option Small & Large Knob Options
Gain
Unity Gain (Voltage In = Voltage Out)
Processor Type
Analog Processor
Signal Input
1 RCA Pair (left/right) Female Jacks 3.5mm Stereo Jack

Highlights

Overview
  • 1 Year Warranty
  • Allows level adjustment of an audio signal
  • High quality audio potentiometer provides linear volume control over entire knob range

Review highlights

Based on customer reviews

Rockford Fosgate Universal Punch Level Control — simple, reliable inline volume control

A plug-and-play inline level control that's very easy to install and delivers dependable performance. One reviewer reports using it with a Bluetooth receiver in an RZR to adjust volume while keeping their phone in their pocket.

3 reviews5.0/5 averageUpdated Mar 15, 2026

What buyers praise

  • Plug-and-play — extremely easy to install
  • Dependable, consistent performance
Overview

The PLC-U is an inline, universal audio level control that lets you vary the signal level of a stereo pair of RCA cables. It uses a high-quality audio taper potentiometer for linear output control and offers multiple mounting configurations to suit different installs.

Best for

  • Adding a master or secondary level control where a system lacks one
  • Independent control of a specific signal path in a car audio system
  • Dash or panel installations requiring compact, configurable controls

Key points

  • Inline universal level control designed for a stereo pair of RCA cables
  • High-quality audio taper potentiometer for true linear control of output
  • Multiple mounting options: panel mount (1" hole) with large/small knob choices, under-dash bracket, and rocker-switch style
  • Rocker-switch option includes a 3.5mm-to-RCA extension port to extend an AUX input to the dash
  • Rocker-switch assembly can be disassembled for a flush panel-mount option of the knob

Fit and use

Intended to be integrated inline with any stereo RCA signal pair to provide variable level control. Select the mounting style that matches your dash or panel clearance needs. Use the rocker-switch option if you want an AUX input extension to the dash via the 3.5mm-to-RCA port.

What to know

Designed for signal-level control of RCA audio lines, not as a power amplifier. Verify that your system uses RCA connections and that the chosen mounting option fits your vehicle’s dash or panel before purchasing.

Highlights

Key features

  • 1 Year Warranty
  • Allows level adjustment of an audio signal
  • High quality audio potentiometer provides linear volume control over entire knob range
  • Panel mount option with large and small knob configurations
  • Provides In-line signal level control
  • Under dash mounting option used with panel mount unit
  • Rocker switch mounting option with integrated 3.5mm to RCA extension port
  • Rocker switch can be disassembled to facilitate flush panel mount ability
  • Panel mount option mounts in 1" diameter mounting hole
More info

Manufacturer details

An inline audio signal level control featuring a variety of mounting options including panel mount with large and small knob configurations, under dash mounting and rocker switch style mounting. The rocker switch option also includes a 3.5mm to RCA extension port to extend a radios AUX input to your dash. The rocker switch can also be disassembled to allow for a flush panel mount option of the knob assembly.

Additional details

The PLC-U is designed as an inline, universal audio level control that can be integrated into almost any audio system. It is intended to allow you to vary the signal level of any stereo pair of RCA cables in the event you do not have a master volume control or you want more independent control over a specific signal path. The system is comprised of a high quality audio taper potentiometer which provides for true linear control of the output signal. It also comes with a variety of mounting configurations to meet your installation needs. A panel mount version which uses a 1" mounting hole and is held in place with a threaded retaining nut features a large and small knob option letting you choose which is best for the application.

A universal underdash bracket is also provided to be used in conjunction with the panel mount unit if your install requires more clearance. Lastly, we include a rocker switch mount with integrated level control and 3.5mm aux input to RCA extension port. This is perfect for those vehicles that already have the rocker switch knockouts molded in. This unit can also be disassembled to allow the level control to be surface mounted using a smaller hole in locations where the larger options may not fit. These features and functionaility make the level control compatible with most source units, line drivers and amplifiers while being perfect for mobile, marine or off-road applications.

Specs

Specifications

7
MountingFlush / Panel Mount (1" diameter) Under Dash / Center Console Rocker Switch Mount w/ 3.5mm Input Option Small & Large Knob Options
GainUnity Gain (Voltage In = Voltage Out)
Processor TypeAnalog Processor
Signal Input1 RCA Pair (left/right) Female Jacks 3.5mm Stereo Jack
Signal Output1 RCA Pair (left/right) RCA Female Jacks 1 RCA Pair (left/right) Female Jacks for 3.5mm Input
Input Impedance
Output Impedance
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