Clear-Com MS-704, 4 Ch. headset/speaker main station

Clear-Com MS-704, 4 Ch. headset/speaker main station

Clear-Com MS-704 features an enhanced intelligibility, Clear-Com MS-704 mic preamp with limiter and proprietary speech-shaping circuits improve the quality of words spoken into the system. Clear-Com MS-704 also has an individual Sidetone control allows the operator to vary the level of his or her own voice as heard in the headset. Clear-Com MS-704 also has a remote that turns off the microphone talk circuits of all Clear-Com beltpacks eliminating noise from the open headset microphones. Clear-Com MS-704 also has a power supply protection in the event of a short circuit or current overload, the protection circuit with shut down the output to avoid damage and will automatically restore the system power as soon as the fault condition is removed.

Clear-Com MS-704 Product Features

• 4-Channel 2RU Main Station with built-in Speaker
• Supports up to 55 beltpacks or 10 speaker stations on 4 channels
• Automatic short-circuit protection and reset with LED indicators
• Visual and audible call signaling
• 3 interruptible IFB channels
• Individual volume controls for each channel
• Program feed to both channels with selectable Program Interrupt
• Remote Mic Kill
• Stage Announce with relay
• Channel A & B Link switch
• Built-in speaker
• Universal voltage power supply
• Enhanced Intelligibility
• Interruptable Monitoring
• Eliminate Noise
• Power Supply Protection

Panel Microphone Input
Input Type: Electret

Input Impedance: >=2K

Mic Limiter Threshold: 0 dBu ±3 dB

Mic Limiter Range: >= 20 dB

Headset Microphone Input
Input Type: Dynamic

Input Impedance: >= 1K

Mic Limiter Threshold: 0 dBu ± 3dB

Mic Limiter Range: >= 15 dB

Program Line Input
Maximum Level before Clipping: >= 20 dBu

Input Impedance: >= 5K

Headset Output
Load Impedance: >= 8

Output Impedance: <= 25

Output Limiter Threshold: +5 dBu ± 3 dB

Maximum Output Level before Distortion: >= 17 dBu

Speaker Output
Load Impedance: >= 4

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

Partyline Output
O Noise: < -74 dBu

Output Impedance: >10 K

Partyline Input
Crosstalk: < -60 dB

Max level before Clipping: >= 12 dBu

Sidetone Null Capability: > 25 dB

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 ± 3 dB

Headset Mic – Line Out: 200 – 12KHz ± 3 dB

Program Input – Partyline: 100 17KHz ± 3 dB

Program Input – Headset Out: 200 – 10KHz ± 3 dB

Program Input – Speaker Out: 300 – 10KHz ± 3 dB

Partyline – Headset Out: 200 – 10KHz ± 3 dB

Partyline – Speaker Out: 300 – 10KHz ± 3 dB

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: < -65 dBu

Headset Mic – Partyline: < -70 dBu

Headset Mic – Line Out: < -55 dBu

Program Input – Partyline: < -85 dBu

Program Input – Headset Out: < -60 dBu

Program Input – Speaker Out: < -60 dBu

Partyline – Headset Out: < -50 dBu

Partyline – Speaker Out: < -50 dBu

Max Gain
Panel Mic – Partyline: >= 37 dB

Headset Mic – Partyline: 41 dB ± 2 dB

Headset Mic – Hot Mic Out: 55 dB ± 3 dB

Headset Mic – Announce Out: 55 dB ± 3 dB

Program Input – Partyline: >= -16 dB

Program Input – Headset Out: >= 18 dB

Program Input – Speaker Out: >= 24 dB

Partyline – Headset Out: >= 34 dB

Partyline – Speaker Out: >= 40 dB

Min Gain
Panel Mic – Partyline: <= 25 dB

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

Environmental
32 – 122°F (0 – 50°C)

Dimensions
1.75 x 19 x 6.5 in (HxWxD)

(44 x 483 x 165 mm)

Weight
6.1 lbs (2.8 kg)