The ClearCom MS-702 is a 1RU two-channel Intercom System Main Station with programmable front panel buttons, individual channel short-circuit protection, individual channel volume control, and a regulated fail-safe power supply for Encore Analog Partyline Intercom Systems. Encore is a 2-wire analog partyline system with intuitive plug-and-play design and superior "Clear-Com Sound" audio clarity.
The MS-702 supports up to 55 beltpacks or 10 speaker stations and 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. Built in 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 with blue-color while in standby and 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.
Features:
Specifications:
| Input Type | Electret |
| Input Impedance | ≥ 2 kΩ |
| Mic Limiter Threshold | 0 dBu ± 3 dB |
| Mic Limiter Range | ≥ 20 dB |
| Input Type | Dynamic |
| Input Impedance | ≥ 1 kΩ |
| Mic Limiter Threshold | 0 dBu ± 3 dB |
| Mic Limiter Range | ≥ 15 dB |
| Max Level Before Clipping | ≥ 20 dBu |
| Input Impedance | ≥ 5 kΩ |
| Load Impedance | ≥ 8 Ω |
| Output Impedance | ≤ 25 Ω |
| Output Limiter Threshold | +5 dBu ± 3 dB |
| Max Output Level (Distortion) | ≥ 17 dBu |
| Load Impedance | ≥ 4 Ω |
| Max Output Level (1% THD) | 20 dBu ± 2 dBu |
| Off Noise | < -74 dBu |
| Output Impedance | > 10 kΩ |
| Crosstalk | < -60 dB |
| Max Level Before Clipping | ≥ 12 dBu |
| Sidetone Null Capability | > 25 dB |
| Type | Balanced |
| Output Impedance | ≥ 200 Ω |
| Load Impedance | ≥ 600 Ω |
| Type | Unbalanced |
| Output Impedance | 180 Ω |
| Load Impedance | ≥ 600 Ω |
| Panel Mic → Partyline | 600 – 10 kHz ± 3 dB |
| Headset Mic → Partyline | 200 – 12 kHz ± 3 dB |
| Headset Mic → Line Out | 200 – 12 kHz ± 3 dB |
| Program In → Partyline | 100 – 17 kHz ± 3 dB |
| Program In → Headset Out | 200 – 10 kHz ± 3 dB |
| Program In → Speaker Out | 300 – 10 kHz ± 3 dB |
| Partyline → Headset Out | 200 – 10 kHz ± 3 dB |
| Partyline → Speaker Out | 300 – 10 kHz ± 3 dB |
| Panel Mic → Partyline | ≤ 0.5% |
| Headset Mic → Partyline | ≤ 0.5% |
| Headset Mic → Line Out | ≤ 0.5% |
| Program In → Partyline | ≤ 0.2% |
| Program In → Headset Out | ≤ 0.2% |
| Program In → Speaker Out | ≤ 0.5% |
| Partyline → Headset Out | ≤ 0.2% |
| Partyline → Speaker Out | ≤ 0.5% |
| Panel Mic → Partyline | < -65 dBu |
| Headset Mic → Partyline | < -70 dBu |
| Headset Mic → Line Out | < -55 dBu |
| Program In → Partyline | < -85 dBu |
| Program In → Headset Out | < -60 dBu |
| Program In → Speaker Out | < -60 dBu |
| Partyline → Headset Out | < -50 dBu |
| Partyline → Speaker Out | < -50 dBu |
| 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 In → Partyline | ≥ -16 dB |
| Program In → Headset Out | ≥ 18 dB |
| Program In → Speaker Out | ≥ 24 dB |
| Partyline → Headset Out | ≥ 34 dB |
| Partyline → Speaker Out | ≥ 40 dB |
| Panel Mic → Partyline | ≤ 25 dB |
| Input Voltage Range | 100–240 V AC |
| Input Frequency Range | 50–60 Hz |
| Input Power | ≤ 60 V AC |
| Output Voltage | 30 V DC ± 0.5 V |
| Output Current per Channel (Cont.) | 1.2 A |
| Output Current per Channel (Peak) | 2 A (limit to 2 sec every 1 min) |
| Short Circuit Recovery (1st Short) | ≤ 0.5 sec |
| Short Circuit Recovery (20 Shorts) | ≤ 20 sec |
| Operating Temperature | 32 – 122 °F (0 – 50 °C) |
| Dimensions (HxWxD) | 1.75 × 19 × 6.5 in (44 × 483 × 165 mm) |
| Weight | 6.1 lbs (2.8 kg) |