JBL CSM-21 Public Address Mixer

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Product Code: 9999-14616
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JBL CSM-21 Public Address Mixer

The JBL CSM-21 Public Address Mixer 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 JBL CSM-21 Public Address Mixer 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. Two RJ-45 Link ports allow multiple CSM devices to be linked to increase the number of output zones. Linking CSM devices shares the inputs from the main devices over Cat5 cable and eliminates the need for Y-cables.

An included security plate can be placed over the front panel controls to avoid uninvited changes to a commissioned system.

JBL CSM-21 Public Address Mixer Features

  • 2 Stereo Inputs
  • 1 Mic Input
  • 1 Line Input for Priority Audio
  • 1 Stereo Output with Dedicated Subwoofer Output
  • Quick and Simple Configuration via Front/Rear Panel Controls
  • Digital Processor with Analog-Style Control
  • Music EQ
  • Global Mic EQ
  • AutoWarmth™ and LevelGuard™
  • Optional CSR-2SV wall controller provides source selection and volume control
  • Optional CSR-V wall controller provides volume control
  • Contact Closure Control
  • Link Bus for Input Sharing

JBL CSM-21 Public Address Mixer Specifications

  • Line Inputs:
    • Type: Unbalanced, RCA Connector x 2 (Stereo)
    • Nominal Sensitivity: -10dBV
    • Input Impedance: 20k Ohms
    • Maximum Input: +12dBu
    • Equalization: Bass +/- 10dB @ 80hz, Treble +/- 10dB @ 8khz, 6dB/Octave Shelf
  • Mic input:
    • 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
  • Zone Output:
    • Type: 1 Stereo (Left, Right, Sub), Balanced 3.5mm, Euroblock Connector
    • Output Impedance: 120 Ohm Balanced
    • Max. Output Level: +20dBu
  • Rear Panel LED Indicators:
    • Source Inputs:
      • Signal Present LED (Turns On at -20dBu)
      • Signal Clip LED (Turns On at +10dBu)
    • Mic Input:
      • Signal Present LED (Turns On at -20dBu)
      • Signal Clip LED (Turns On at +18dBu)
  • System Performance:
    • 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
  • Miscellaneous:
    • Direct Input: Balanced, 5.08mm Euroblock Connector
    • Input Impedance: 10k Ohms
    • Maximum Input: +20dBu
    • Frequency Response: 20hz-20khz
    • Music Mute: 2-Pin 5.08mm Euroblock Connector Connecting the Pins Mutes All Source Inputs, Does Not Mute Mic Input
    • Page Assign: 2-Pin 5.08mm Euroblock Connector Connecting the Pins will Assign a Page to the Output Zone
    • Source Link: RJ45, CAT3 or Higher. Max Length 2.4m
    • Main Link: RJ45, CAT3 or Higher. Max Length 2.4m
  • General:
    • Power Consumption: 10W
    • Power Requirements: 100-240V Thermal Fuse in External Transformer
    • Dimensions (W x H x D): 19.0”(483mm) x 1.8”(46mm) (No Feet) x 7.0”(178mm) (Including Knobs and Connectors)
    • Weight: 5.3 lbs (2.4kg)

JBL CSM-21 Public Address Mixer Includes

  • JBL CSM-21 Public Address Mixer
  • Power Cord
  • Security Plate for Front Panel Lockout
  • Owners Manual
  • 5 Year Warranty

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Nice Product

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