The JBL Commercial CSM-21 offers fixed I/O, pre-configured architecture, full stereo or mono operation, flexible routing and control of multiple audio sources, simple front-panel configuration and control without the need for a computer, compatibility with the CSR wall controllers, compatibility with the CSPM paging microphones and optional duplication of audio channels to another device via a Cat5 cable.
The CSM-21 features two stereo music inputs with gain control and clip LEDs, and one stereo output with an active crossover and a dedicated subwoofer output.
Two additional inputs are provided for music override. First, a mic input with phantom power and gain control can be routed to the output zone, ducking the music by a user-configurable amount. Second, a line input allows high-priority ducking of all sources, which is ideal for alarms.
Dedicated controls for music EQ and dedicated controls for global mic EQ allow the frequency content of each input type to be customized independently. LevelGuard™ is provided to retain consistent volumes between the various inputs, and AutoWarmth™ is provided to ensure full fidelity at all zone volume levels.
A Zone Remote port facilitates connection of the CSR wall controllers, which can provide source selection and/or volume control. Source select, music level and mic level can also be controlled on the front panel. For additional control, two logic inputs facilitate page steering and music muting via contact closure.
| Type | 2 stereo, unbalanced RCA connectors |
|---|---|
| Nominal Sensitivity | -10dBV |
| Input Impedance | 20k ohms |
| Maximum Input | +12dBu |
| Equalization | Bass +/- 10dB @ 80Hz, Treble +/- 10dB @ 8kHz, 6dB/Octave Shelf |
| Type | Balanced, 5.08 mm, Euroblock connector |
| Input Impedance | 2k ohms |
| Noise | EIN |
| Maximum Input | +20dBu |
| Equalization | Bass +/-6dB @ 250Hz, Treble +/-6dB @ 2kHz, 6dB/Octave Shelf |
| CMRR | >40dB, typically >55dB @ 1kHz |
| Pre-Amp Gain | +30dB to +60dB adjustable |
| Phantom Power | +48VDC, 10mA |
| Type | 1 stereo (Left, Right, Sub), balanced 3.5 mm, Euroblock connector |
| Output Impedance | 120 ohm balanced |
| Max. Output Level | +20dBu |
| Out | Left, Right: 20Hz-20kHz Sub: 20Hz-20kHz (mono summed) |
| In | Left, Right: 125Hz High-Pass (BW24) Sub: 125Hz Low-Pass (BW24) |
| Source/Mic Inputs | Signal Present LED (turns on at -20dBu),Signal Clip LED (turns on at +10dBu) |
| Frequency Response | 20Hz – 20kHz, +/- 0.1dB |
| Dynamic Range | 104dB, A-Weighted, 20Hz-20kHz |
| Converter Type | Mic input implements dbx Type IV™ Conversion System |
| Sample Rate | 48kHz |
| Crosstalk | >75 dB |
| THD+N | 0.005% typical at +4dBu, 20Hz-20kHz, 0dB gain |
| Direct Input | Balanced, 5.08 mm Euroblock connector; Input Impedance: 10k ohms |
| Direct Input | Maximum Input: +20dBu; Frequency response: 20Hz-20kHz |
| Music Mute | 2-pin 5.08 mm Euroblock connector; Connecting the pins mutes all Source inputs, does not mute Mic input |
| Source Link | RJ45, CAT3 or higher. Max length 2.4m |
| Power Consumption | 10W |
| Power Requirements | 100-240V Thermal fuse in external transformer |
| Dimensions (H x W x D) | 1.8” (46 mm) x 19.0” (483 mm) x 7.0” (178 mm) |
| Weight | 5.3 lbs (2.4 kg) |
Usually arrives in 5-9 business days.
