Sonifex CM-LUX1

The Sonifex CM-LUX1 Balanced to Unbalanced Audio Converter allows the connection of a stereo balanced line input via 2 x female XLRs to a stereo unbalanced output on phono connectors. It is transformer balanced, with a 2:1 ratio, so 6dB of attenuation is added to the input to help interface with the lower signal levels associated with consumer outputs. This unit is a passive version of the RB-LU4 (though only 1 x stereo channel), and provides you with an alternative to having to interface a balanced output to an unbalanced input via specialist cables (either by shorting the non-phase to ground or disconnecting it). It is particularly useful where a shared balanced audio feed needs interfacing to an unbalanced input on one or more pieces of equipment. Using a CM-LUR1 or CM-LUX1 galvanically isolates the audio, allowing you to connect via phono cables to an unbalanced input without compromising the distributed feed.

Block Diagram

Analogue Inputs

The stereo analogue input is on two female 3 pin XLR connectors with the following pin assignments: Pin 1: 0V Common Pin 2: Phase Pin 3: Non Phase

RCA Phono Analogue Outputs

This unit uses a stereo unbalanced line output on an RCA phono connector with the following connections:

Pin Type	Connection
White Tip:	Left
White Screen:	Ground
Red Tip:	Right
Red Screen:	Ground

CM-LUX1 Technical Specification
Audio Specification
Input/Output Level Ratio:	2:1
Input/Output Impedance Ratio:	4:1
Max Input Level:	+28dBu
Max Output Level:	+22dBu
Frequency Response:	20Hz to 20kHz, +0/-0.5dB
Noise:	<-115dBu A-wgtd
Distortion Ref +8dBu (Output):	<0.01%
Common Mode Rejection:	>80dB
Connections
Balanced Line Input::	2 x female XLRs
Unbalanced Line Output:	2 x RCA phono connectors
Equipment Type
CM-LUX1:	Balanced to unbalanced audio converter, XLR input
Physical Specification
Dimensions (Raw):	7.7 cm (W) x 8.3 cm (D) x 4.2 cm (H) 3.0” (W) x 3.3” (D) x 1.7” (H)
Dimensions (Boxed):	12.7 cm (W) x 22.9 cm (D) x 7.6 cm (H) 5” (W) x 9” (D) x 3” (H)
Weight:	Nett: 0.22 kg Gross: 0.33 kg Nett: 0.49lbs Gross: 0.73lbs