Clear-Com MS-704 Intercom 4-Channel Headphone Speaker Base Station

Technicial Specifications

Panel Microphone Input

Input Type: Electret

Input Impedance: >= 2K

Microphone Limiter Threshold: 0 dBu ± 3 dB

Microphone Limiting Range: >= 20 dB

Headphone Microphone Jack

Input Type: Dynamic

Input Impedance: >=1K

Microphone Limiter Threshold: 0 dBu ± 3dB

Microphone Limiter Range: >= 15 dB

Program Line Entry

Maximum Level Before Clipping: >= 20 dBu

Input Impedance: >= 5K

Headphone Out

Load Impedance: >= 8

Output Impedance: <= 25

Output Limiting Threshold: +5 dBu ± 3 dB

Maximum Output Level Before Distortion: >= 17 dBu

Speaker Output

Load Impedance: >= 4

Maximum Output Level Before 1% Distortion: 20 dBu ± 2 dBu

Partyline Output

O Noise: <-74 dBu

Output Impedance: >10K

Partyline Login

Crosstalk: <-60 dB

Maximum level before clipping: >= 12 dBu

Sidetone Null Capability: > 25 dB

Stage Announcement / Balanced Line Out

Type: Balanced

Output Impedance: >= 200

Load Impedance: >= 600

IFB / Warm Microphone

Type: Unbalanced

Output Impedance: 180

Load Impedance: >= 600

frequency response

Panel Microphone - Partyline: 600 - 10KHz ± 3dB

Headphone Microphone - Partyline: 200 - 12KHz ± 3 dB

Headphone Microphone - Line Out: 200 - 12KHz ± 3 dB

Program Input - Partyline: 100 17KHz ± 3 dB

Program Input - Headphone Output: 200 - 10KHz ± 3 dB

Program Input - Speaker Output: 300 - 10KHz ± 3 dB

Partyline - Headphone Output: 200 - 10KHz ± 3 dB

Partyline - Speaker Output: 300 - 10KHz ± 3 dB

Maximum Distortion

Panel Microphone - Partyline: <= 0.5%

Headset Microphone - Partyline: <= 0.5%

Headphone Microphone - Line Out: <= 0.5%

Program Input - Batch Line: <= 0.2%

Program Input - Headphone Output: <= 0.2%

Program Input - Speaker Output: <= 0.5%

Partyline - Headphone Output: <= 0.2%

Party Line - Speaker Output: <= 0.5%

noise, sound

Panel Microphone - Partyline: <-65 dBu

Headset Microphone - Partyline: <-70 dBu

Headphone Microphone - Line Out: <-55 dBu

Program Input - Partyline: <-85 dBu

Program Input - Headphone Output: <-60 dBu

Program Input - Speaker Output: <-60 dBu

Partyline - Headphone Output: <-50 dBu

Partyline - Speaker Output: <-50 dBu

Max Gain

Panel Microphone - Partyline: > = 37 dB

Headphone Microphone - Partyline: 41 dB ± 2 dB

Headset Microphone - Warm Microphone Output: 55 dB ± 3 dB

Headphone Microphone - Audio Output: 55 dB ± 3 dB

Program Input - Partyline:> = -16 dB

Program Input - Headphone Output: > = 18 dB

Program Input - Speaker Output: >= 24 dB

Partyline - Headphone Output: > = 34 dB

Partyline - Speaker Output: > = 40 dB

Min Gain

Panel Microphone - 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 (Peak) Per Channel: 2 A (do not exceed 1.2A for more than 2 seconds in 1 minute period)

Short Circuit Recovery Time (1st short): <= 0.5 sec

Short Circuit Recovery Time>= 20 seconds short: <= 20 seconds

Environmental

32 to 122°F (0 to 50°C)

Dimensions

1.75 x 19 x 6.5 inches (HxWxD)

(44 x 483 x 165mm)

Weight

6.1 lb (2.8 kg)