Clear-Com Encore MS-704 four-channel central station

Clear-Com Encore® is an analog 2-wire partyline system with intuitive plug-and-play design and superior "Clear-Com Sound" sound quality.

The MS-704 is a four-channel 2RU master station with programmable front panel buttons, short-circuit protection for individual channels, volume control for individual channels and an adjustable emergency power supply. The MS-704 supports up to 55 beltpacks or 10 speaker stations.

Audio sources and monitoring system

The MS-704 accepts five separate line-level program audio sources: four symmetrical inputs and one programmable input. This input accepts a symmetrical signal and is designed for monitoring an external audio source. The four symmetrical program inputs can be used to create individual program channels on the intercom channels. The MS-704 can monitor intercom activity on one or all four channels with individual volume controls. Monitoring of intercom activity is possible through a headset or built-in high-sensitivity speaker.

Talk Section

MS-704 microphone preamplifiers with limiters and speech shaping circuits. An individual electronic Talk button operating in momentary/latch mode is available for each channel. The dual-action LED-illuminated Talk buttons glow softly when operating in latch mode: blue indicates standby, amber that latch is active. The latch function can be turned off. Channels can be accessed separately or simultaneously without being linked together. The station has a dedicated switch to select between headset and microphone. Talk buttons can also be controlled with a foot switch.

Announce output

The symmetrical, linear Stage Announce signal on the MS-704 is realized via a 1/4" TRS jack on the rear panel. The Announce button on the front panel activates the Announce output and relay. The relay circuit, on a separate 1/4" TRS connector, is typically used to mute monitors.

Call signaling

The MS-704 has individual Call buttons with visual call signaling for each partline channel. The visual signal will flash brightly and beep if the remote station operator holds down the Call button for more than 2 seconds. The call signaling function can be programmed on the Talk buttons.

Remote Mic Kill (RMK)

The MS-704 features a global Remote Mic Kill button. It disables the active Talk function on all beltpacks in the system, eliminating unwanted noise from active headphones.

Programmatic input and IFB

The MS-704 has a symmetrical microphone- or line-level program signal for monitoring with a headset and/or mixing it with intercom audio on one or both channels. When Interrupt is selected, the program signal is muted when the Talk button is pressed.

Configuration panel

The MS-704 has a removable front panel for easy access to the station's configuration switches and potentiometers. Clearly labeled and easy-to-adjust controls allow you to quickly configure the MS-704. Once configuration is complete, the front panel can be reattached so that only the necessary controls are visible.

Power supply

The MS-704 has a visual indication of power status. In the event of a short circuit or current overload on one of the channels, that channel will shut down while the other continues to operate. As soon as the fault condition is cleared, an auto-reset circuit will restore power to that channel, even at full load.

Key features

- Supports up to 55 beltpacks or 7 speaker stations on two channels
- Individual for each channel automatic short circuit protection
- Talk buttons operating in momentary/latching mode
- Microphone or line input Program audio for both channels with Program Interrupt (IFB) function
- Individual call buttons on each channel
- Remote Mic Kill
- Stage announce output with relay
- Limiter
- Individual volume control for each channel
- Visual and audible signaling
- A & B Link channel link function for single channel operation
- Built-in speaker
- External switchable line termination on each channel
- Universal power supply