Clear-Com 4-Channel Main Intercom Station with Power Supply

SKU: CCMS704CC

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Clear-Com MS-704 Specifications

  • Panel Microphone Input

    Input Type: Electret
    Input Impedance: >=2kOhms
    Mic Limiter Threshold: 0dBu +/-3dB
    Mic Limiter Range: >= 20dB

  • Headset Microphone Input

    Input Type: Dynamic
    Input Impedance: >= 1kOhms
    Mic Limiter Threshold: 0dBu +/-3dB
    Mic Limiter Range: >= 17dB

  • Program Line Input

    Maximum Level before Clipping: >= 20dBu
    Input Impedance: >= 5kOhms

  • Headset Output

    Load Impedance: >= 8Ohms
    Output Impedance: <= 25Ohms
    Output Limiter Threshold: +5dBu +/-3dB
    Maximum Output Level before Distortion: >= 17dBu

  • Speaker Output

    Load Impedance: >= 4Ohms
    Max Output Level before 1% Distortion: 20dBu +/- 2dBu

  • Partyline Output

    Off Noise: < -74dBu
    Output Impedance: >10kOhms

  • Partyline Input

    Crosstalk: < -60dB
    Max level before Clipping: >= 12dBu
    Sidetone Null Capability: > 25dB

  • Stage Announce/Balanced Line Out

    Type: Balanced
    Output Impedance: >= 200Ohms
    Load Impedance: >= 600Ohms

  • IFB/Hot Mic

    Type: Unbalanced
    Output Impedance: 150Ohms
    Load Impedance: >= 600Ohms

  • Frequency Response

    Panel Mic - Partyline: 600 - 10KHz +/- 3dB
    Headset Mic - Partyline: 200 - 12KHz +/- 3dB
    Headset Mic - Line Out: 200 - 12KHz +/- 3dB
    Program Input - Partyline: 100 - 17KHz +/- 3dB
    Program Input - Headset Out: 200 - 10KHz +/- 3dB
    Program Input - Speaker Out: 300 - 10KHz +/- 3dB
    Partyline - Headset Out: 200 - 10KHz +/- 3dB
    Partyline - Speaker Out: 300 - 10KHz +/- 3dB

  • Max Distortion

    Panel Mic - Partyline: <= 0.5%
    Headset Mic - Partyline: <= 0.5%
    Headset Mic - Line Out: <= 0.5%
    Program Input - Partyline: <= 0.2%
    Program Input - Headset Out: <= 0.2%
    Program Input - Speaker Out: <= 0.5%
    Partyline - Headset Out: <= 0.2%
    Partyline - Speaker Out: <= 0.5%

  • Noise

    Panel Mic - Partyline: < -65dBu
    Headset Mic - Partyline: < -70dBu
    Headset Mic - Line Out: < -55dBu
    Program Input - Partyline: < -85dBu
    Program Input - Headset Out: < -60dBu
    Program Input - Speaker Out: < -60dBu
    Partyline - Headset Out: < -50dBu
    Partyline - Speaker Out: < -50dBu

  • Max Gain

    Panel Mic - Partyline: >= 37dB
    Headset Mic - Partyline: 41dB +/- 2dB
    Headset Mic - Hot Mic Out: 55dB +/- 3dB
    Headset Mic - Announce Out: 55dB +/- 3dB
    Program Input - Partyline: >= -16dB
    Program Input - Headset Out: >= 18dB
    Program Input - Speaker Out: >= 24dB
    Partyline - Headset Out: >= 34dB
    Partyline - Speaker Out: >= 40dB

  • Min Gain

    Panel Mic - Partyline: <= 25dB

  • Mains Power

    Input Voltage Range: 100 - 240 VAC
    Input Frequency Range: 50 - 60 Hz
    Input Power: <= 60 VAC
    Output Voltage: 30 VDC +/-0.5V
    Output Current per Channel (Continuous): 1.2 A
    Output Current per Channel (Peak): 2 A (Do not exceed the 1.2A rating for more than 2 seconds per 1 minute period)
    Short Circuit Recovery Time (1st short): <= 0.5 sec
    Short Circuit Recovery Time >= 20 shorts in 20sec): <= 20 sec

  • Station Capacity

    Up to 40 RS-601 beltpacks or 10 speaker stations or 12 headset stations distributed over all channels

  • Rear Panel Connectors

    Intercom: XLR-3M (2 per channel)
    Announce Out: XLR-3M (audio)
    Program: 1x XLR-3F
    Hot Mic / IFB Interface: 1x 1/4 in. (0.64 cm) phone jack
    Accessory: 1x DB-15F
    AC Power: IEC 320 connector

  • Rear Panel Controls

    1x Power switch

  • Front Panel Connectors

    Panel Mic: 1x 1/4 in. (0.64 cm) panel mounting jack
    Headset: 1x XLR-4M

  • Front Panel Controls & Indicators

    1x Panel / headset mic switch
    1x Mic on button
    1x All talk button
    1x Announce button
    1x Partyline link button
    4x Program ON-OFF-INTERRUPT DIP switches
    1x Program level control
    4x Listen adjust controls
    4x Channel null adjust controls
    4x Channel program feed adjust controls
    4x Talk buttons
    4x Call buttons
    4x Listen buttons
    1x RMK button

  • Front Panel Controls & Indicators (Cont)

    1x Speaker ON-OFF switch
    1x Speaker volume control
    4x Short LEDs
    1x Panel mic gain control
    1x Sidetone adjust control
    1x Headset audio limiter DIP switch
    3x Interrupt enable DIP switches
    4x Auto-call DIP switches
    4x Auto-talk/listen DIP switches
    4x Talk latch disable DIP switches
    4x Line length DIP switches

  • Environmental

    32 to 122 deg. F (0 to 50 deg. C)

  • Dimensions (W x H x D)

    19 x 3.5 x 10.5" (482.60 x 88.90 x 266.70mm)

  • Weight

    10.86lbs (4.93kg)

About Clear-Com MS-704

Superior "Contoured" Audio
Compatible with all Clear-Com party-line intercoms, the 704 series accepts a wide range of dynamic headsets, with a choice of headset connectors. Optional plug-in noise-cancelling gooseneck microphones are available in 9" and 18" lengths.

Remote Mic Kill (RMK)
The MS-704 is equipped with a global RMK button. It will turn o the microphone talk circuits of all Clear-Com beltpacks in the system, eliminating extraneous noise from the "open" headset microphones.

Redundant "Failsafe" Power Supply
The 1.2-amp universal switching power supply is a 30-volt regulated supply with multiple short-circuit protection. It can sense the difference between a long-term short circuit and an instantaneous overload, allowing the intercom to continue to operate even when a station is plugged in, momentarily exceeding the capacity of the power supply. If a shutdown occurs from a shorted intercom cable, the power supply will recover under full load when the short is removed.

"Easy Access" Sub Panel
A removable front panel gives the operator easy access to the station's configuration switches and trim pots. Clearly labeled and simple to adjust, these controls allow the station to be instantly configured for virtually any communications application. When configuration is complete, the front panel re-attaches, revealing only those controls useful for normal operation.

Multiple Program Audio Sources
The station accepts five separate program audio sources: four line-level balanced inputs and one assignable line level input. The assignable program input accepts a balanced signal and is designed for monitoring external audio in the headset or speaker. The four balanced program inputs can be used to create individual program feeds on the intercom channels. Three of these channels can be used for program interrupt.

What's in the box:

  • Clear-Com 4-Channel Main Intercom Station with Power Supply
  • Clear-Com 2 Year Limited Warranty