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1.  Introduction

Welcome!

Thank you for purchasing the CRC-VUL Remote Volume Control panel. In 

conjunction with the Lab.Gruppen CA, CM, CMA and CPA Series of commercial 

amplifiers, the CRC-VUL provides easy control over volume. The CRC-VUL will fit in 

most standard-depth installation enclosures and will blend with any décor.

2.  Control

CRC-VUL features a single volume knob with an illuminated LED ring.

3.   LED Ring Illumination 

Configuration

The LED ring illumination can be configured with a switch on the PCB. 

ON and OFF positions marked on the PCB and the switch can be found between 

the PCB and the bottom plate.

4.  Assembly and Mounting

The CRC-VUL fastens into the installation enclosure with two screws beneath the 

front plate. Fasten the main unit into the enclosure with the mounting screws 

from the enclosure. When the unit is securely fastened, attach the front plate.

5.  Wiring and Installation

Wire the CRC-VUL to any Remote port on a CA, CM, CMA and CPA product to 

control the volume of the channel associated with the Remote port. 

With custom cabling, a single remote can also be paralleled to the other channels 

remote port on a two-channel device.

6.  Operation

The CRC-VUL volume control is Attenuation only, i.e., the volume control 

can only be used to reduce the volume. The CRC-VUL remote volume control 

and the amplifier’s master volume control are in series and both always active.

Typical configuration includes the following steps:

1.  Turn the CRC-VUL volume knob to maximum (fully clockwise).
2.  Adjust the amplifier’s master volume control to the loudest setting you expect 

will ever be needed. 

3.  Turn the CRC-VUL volume knob down to the desired listening level.
By following this configuration method, the listening level set by the CRC-VUL 

remote volume control can never exceed the maximum level set on the amplifier’s 

master volume.

RJ-45 Pin 

Color 

Potentiometer 

Description

1

White / orange

Fixed end

VCC 10 V

2

Orange

Variable / wiper

Volume control

8

Brown

Fixed end

Ground

CRC-VUL-WH / CRC-VUL-BK

White/Black Volume Remote Control Wall Plate in Single-Gang Format for  

CA, CM, CMA and CPA Series

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