The CM-CU21 is a high quality, portable Commentator Unit. Its sturdy construction and features make it suitable for use in a wide variety of environments. Sonifex has a solution for those situations where a separate commentary unit is required, or where ISDN/pots communications, or a complex digital solution aren’t needed. The CM-CU21 stand alone commentator unit is a rugged, reliable solution which includes all the features needed to ensure 2 commentators can provide their expertise, together with a guest position or co-commentator. The guest position can alternatively be used as a line-level input for international sound or special effects such as the sounds of the action and spectators. Each of the 3 announcer positions has an individual output, with two additional outputs providing a mix of all active commentary channels.
Product Features
2 Commentator positions plus a guest position, each with individual outputs; plus 2 mix outputs.
Talkback outputs selectable by the two main commentators, with built in limiter & adjustable gain.
4 Return audio circuits that are routed to headphones along with all the commentator inputs. Any source can be individually level controlled and sent to left, right or both ears.
A wide input gain range and switchable phantom power on each commentary position allows support of a variety of microphone types including low output ribbon, headsets and high output phantom powered microphones.
Individually switched 48V phantom power on all microphone inputs.
User preset adjustable limiter on main mix outputs with limit activity indication.
Built in line-up tone for cabling checks.
21 Segment LED PPM meter showing main output level.
Transformer balanced inputs and outputs.
Fitted formica ‘Sharpie’ designation strips.
Robust mechanical design with protection for potentiometer knobs.
Universal AC mains, or 12-24 volt DC power.
Typical Applications
Used in sports grounds and arenas by commentators to produce commentary & hear talkback.
Product Category
Analogue Commentary
Technical Specifications
Microphone Input
Gain Range: +20dB to +86dB
Maximum Input Level: -6dBu
Equivalent Input Noise: 130dB Ref. 80dB gain with
Equivalent Input Noise: 150Ω termination
Equivalent Input Noise: 128dB Ref. 50dB gain with
Equivalent Input Noise: 150Ω termination
C.M.R.R.: >60dB
Frequency Response: ±0.5dB 20Hz to 22kHz
Frequency Response: Ref 50dB gain @ 1kHz
Electronically Balanced Line Input
Gain Range: -83dB to +10dB
Maximum Input Level: +25dBu
C.M.R.R.: >70dB
Frequency Response: ±0.2dB 20Hz to 22kHz
Frequency Response: Ref 0dB @ 1kHz
Transformer Balanced Monitor Inputs
Gain Range: -66dB to +11dB measured @ Headphone output
Maximum Input Level: +25dBu
C.M.R.R.: >60dB
Frequency Response: ±0.5dB 20Hz to 22kHz
Frequency Response: Ref 0dB @ 1kHz
Transformer Balanced Main Outputs
Maximum Output Level (Limiter Off): +24dBu
Frequency Response: ±0.5dB 20Hz to 22kHz
Frequency Response: Ref 0dB @ 1kHz
Noise: -94dB Average weighting
Noise: Ref +8dB Line input
THD & N: <0.02% Ref. 1kHz @ +8dBu
THD & N: <0.065% Ref. 1kHz @ +18dBu
1% Distortion Point: +18dBu @ 24Hz
Transformer Balanced Talkback Outputs
Maximum Output Level Limited: +8dBu
Frequency Response: ±0.5dB 20Hz to 22kHz
Frequency Response: Ref 0dB @ 1kHz
Noise: -94dB Average weighting
Noise: Ref +8dB Line input
THD & N: <0.02% Ref. 1kHz @ +8dBu
Electronically Balanced Comm Outputs
Maximum Output Level Limited: +25dBu
Frequency Response: ±0.2dB 20Hz to 22kHz
Frequency Response: Ref 0dB @ 1kHz
Noise: -98dB Average weighting
Noise: Ref+8dB Line input
THD & N: <0.002% Ref. 1kHz @ +8dBu
Headphone Outputs
Gain Range: -66dB to +11dB
Maximum Output Level: +19dBu
Frequency Response: ±0.5dB 20Hz to 22kHz Ref 0dB @ 1kHz
Noise: -85dB Average weighting
Noise: Ref +8dB Line input
THD & N: <0.005% Ref. 1kHz @ +8dBu
Main Panel Operational Controls & Indicators
On-Air 1-3 Buttons: lluminated buttons with latching action
Talkback A & B Buttons: Illuminated buttons with selectable momentary and/or latching action
