Clear-com MS-702 2-Channel Main Station

Clear-com MS-702

Clear-com MS-702 2-Channel Main Station

Product Code: MS-702
Clear-Com MS-702

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• Supports up to 55 beltpacks or 10 speaker stations on 2 channels
• Automatic short-circuit protection and reset with LED indicators
• Visual and audible call signaling
• Individual volume controls for each channel

Clear-com MS-702 Two Channel 1RU Main Station

Clear-com MS-702 is a 1RU two-channel main station with programmable front panel buttons,
individual channel short-circuit protection, individual channel volume control, and a regulated fail-safe power supply. The MS-702 supports up to 55 beltpacks or 10 speaker

Monitoring System

The MS-702 can monitor intercom activity on one or both channels with individual
listen-level controls. Monitoring intercom activity is possible through a headset or the
internal loudspeaker.

Talk Selection

The MS-702 has mic pre-amps with limiters and speech-shaping circuits. An individual
electronic momentary/latching Talk button is available for each channel. Illuminated
dual-action Talk buttons light an LED dimly when latched: blue-color while in standby,
amber-color when latched. The latching feature can be disabled. The channels can be accessed separately or simultaneously without tying them together. A selector switch toggles between the headset or microphone. The Talk buttons can also be controlled with a footswitch.

Announce Output

For paging, the MS-702 provides a balanced, line-level output signal to a 1/4-inch TRS
connector on the rear panel. The front panel Announce button activates the output and the
Announce relay. The relay circuit, on a separate 1/4-inch TRS connector, is typically used to
mute monitors.

Call Signaling

The MS-702 has individual Call buttons with visual call signaling for each channel on the
partyline. The visual signal will flash brightly and will emit an audible signal if the remote station operator holds the Call button for more than 2 seconds. The call signaling feature can be programmed to the Talk buttons.

Remote Mic Kill (RMK)

The MS-702 has a global Remote Mic Kill button. It will turn on the microphone talk circuits of
all beltpacks on the system, eliminating extraneous noise from the open headset microphones.


• Supports up to 55 beltpacks or 10 speaker stations on two channels
• Separate short-circuit protection for each channel
• Dual-action electronic momentary/latching Talk buttons
• Program feed to both channels, with selectable Program Interrupt (IFB)
• Call signal buttons for each channel
• Remote Mic Kill
• Announce output with relay
• Microphone limiting
• Volume controls for each channel
• Visual and audible Tone Alert signaling
• Channels A & B Link switch
• Built-in speaker
• External switchable line termination on each channel
• Universal voltage power supply

• Panel Microphone Input

Input Type: Electret

Input Impedance: >=2K

Mic Limiter Threshold: 0dBu ± 3dB

Mic Limiter Range: >= 20dB

• Headset Microphone Input

Input Type: Dynamic

Input Impedance: >= 1K

Mic Limiter Threshold: 0dBu ± 3dB

Mic Limiter Range: >= 15dB

• Program Line Input

Maximum Level before Clipping: >= 20dBu

Input Impedance: >= 5K

• Headset Output

Load Impedance: >= 8

Output Impedance: <= 25

Output Limiter Threshold: +5dBu ± 3dB

Maximum Output Level before Distortion: >= 17dBu

• Speaker Output

Load Impedance: >= 4

Max Output Level before 1% Distortion: 20dBu ± 2dBu

• Partyline Output

O Noise: < -74dBu

Output Impedance: >10K

• Partyline Input

Crosstalk: < -60dB

Max level before Clipping: >= 12dBu

Sidetone Null Capability: > 25dB

• Stage Announce/Balanced Line Out

Type: Balanced

Output Impedance: >= 200

Load Impedance: >= 600

• IFB/Hot Mic

Type: Unbalanced

Output Impedance: 180

Load Impedance: >= 600

• 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 - 240V AC

Input Frequency Range: 50 - 60Hz

Input Power: <= 60V AC

Output Voltage: 30V DC ± 0.5V

Output Current per Channel (Continuous): 1.2A

Output Current per Channel (Peak): 2A (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

• Environmental

32 - 122°F (0 - 50°C)

• Dimensions

1.75 x 19 x 6.5in (HxWxD)

(44 x 483 x 165mm)

• Weight

6.1lbs (2.8kg)

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