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Category: Matching Converters



cm-lur1
cm-lur1
cm-lur1
cm-lur1
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Studiohub logo

StudioHub+™ is a registered trademark of Radio Systems Inc.

CM-LUR1 Balanced to Unbalanced Audio Converter.


What The Press Said:
KitPlus, July-August 2018 >

 

CM-LUR1 Balanced to Unbalanced Audio Converter

This product allows the connection of a stereo balanced line input via RJ45 with StudioHub+™ pinout to a stereo unbalanced output on stereo 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

cm-lur1 Diagram

Connectors & Controls

Analogue Inputs

The stereo analogue input is on a female RJ45 connector with the following standard StudioHub+™ pin assignments:

Pin No Connection
1 Left Phase
2 Left Non-Phase
3 Right Phase
4 Ground
5 N/C
6 Right Non-Phase
7 N/C
8 N/C

RCA Phono Analogue Outputs

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

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

 

CM-LUR1 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:: 1 x RJ45 female StudioHub+™ pinout
Unbalanced Line Output: 2 x RCA phono connectors
   
   

Equipment Type

 
CM-LUR1: Balanced to unbalanced audio converter, RJ45 input 
   

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

 

 

More Information About This Product

  • Brochure
  • Handbook
  • Accessories & Spares
  • Software Updates
  • Example Of Usage

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Sonifex Ltd. 61 Station Road, Irthlingborough, Northants, NN9 5QE, UK. Tel: +44 (0)1933 650700 Fax: +44 (0)1933 650726 EMail: sales@sonifex.co.uk