sonifex cm ulx1 1

The Sonifex CM-ULX1 allows the connection of a stereo unbalanced line input on phono connectors to a balanced line output via 2 x male XLRs.

It istransformer balanced, with a 1:2 ratio, so 6dB of gain is added to the input to help interface with the higher signal levels associated with professional outputs.

This unit is a passive version of the RB-UL1, and provides you with an alternative to wiring an unbalanced output directly into a balanced input.

By placing this boxe close to the unbalanced output (before the cable run to the balanced input), the connection will benefit from the input device’s common mode rejection capabilities, reducing noise and interference.

Block Diagram

cm-ulx1 Diagram

Audio Specification

Input/Output Level Ratio:1:2
Input/Output Impedance Ratio:1:4
Max Input Level:+22dBu
Max Output Level:+28dBu
Frequency Response:20Hz to 20kHz, +0/-0.5dB
Noise:<-100dBu A-wgtd
Distortion Ref +8dBu (Output):<0.02%


Stereo Unbalanced Line Input (CM-ULR1 & CM-ULX1):2 x RCA phono connectors
Balanced Line Output (CM-ULX1):2 x male XLRs

Equipment Type

CM-ULX1:Unbalanced to balanced audio converter, XLR output

Physical Specification

Dimensions (Raw):7.7cm (W) x 8.3cm (D) x 4.2cm (H) 3.0” (W) x 3.3” (D) x 1.7” (H)
Dimensions (Boxed):12.7cm (W) x 22.9cm (D) x 7.6cm (H) 5” (W) x 9” (D) x 3” (H)
Weight:Nett: 0.22kg Gross: 0.33kg Nett: 0.49lbs Gross: 0.73lbs
BW Price Guarantee

(Subject to conditions)

Sonifex CM-ULX1


Tech Support

2-Year Warranty


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