MS-812A

Technical Specifications

General System
Maximum Intercom Line Length for <-50 dB
crosstalk: 1,000 ft
Signal-to-Noise: > 60 dB

Overall Station Audio
Bandwidth: 150 Hz - 15 kHz
Signal-to-Noise: >75 dB
Channel Separation: > 50 dB
Line Impedance: Terminating (200 Ohms )

Control System
Microprocessor-controlled switching with EEPROM memory. CMOS digital logic and signal switching.
Number of Memories: 4

Mic Preamp
Input Level: -55 dBv nominal, -10 dBv max
Impedance: 200 Ohms nominal
Frequency Response: 150 Hz - 15 kHz (contoured for maximum intelligibility)
Limiter Range: 25 dB
Gain Adjust: +-5 dB
Gain to Intercom Line: +41 dB

Headphone Amplifier
Load Impedance: 50 - 2,000 Ohms
Output Level: >+20 dBv across 600 Ohms
Distortion: <0.2% THD at 1 kHz
Frequency Response: 150 Hz - 18 kHz, +-2 dB
Gain From Intercom Line: +37 dB

Speaker Amplifier
Load Impedance: 8 - 50 Ohms
Output Level: 4 watts into 8 Ohms
Distortion: <0.5% THD at 1 kHz

Local Program Input
Input Impedance: 10 kOhms
Input Level: -10 dBv
Frequency Response: 150 Hz - 15 kHz
Type: Electronically balanced and bridging

Aux Program Input (dB 15)
Type: Electronically balanced
Nominal Input Level: -10 dBv

Studio Announce
Type: Transformer balanced output
Level: 0 dB
Relay: SPDT
Contact Rating: 24 Volts DC @ 1 amp

Electret Microphone (Optional)
Connection: Proprietary plug-in locking connector
Pattern: Cardioid
Length: 9" or 18" gooseneck
Frequency Response: 100 Hz - 20 kHz

Talk Remote Control
Two logic inputs

Connectors
Headset: 4-pin male XLR
Intercom Lines: Twelve 3-pin male XLR
Program Input: 3-pin female XLR
SA Output: 3-pin male XLR
Auxiliary: DB-15 connector
External Speaker: 1/4" phono jack
Relay/Footswitch: DB-9 connector
Optional IFB Connectors: Two XLR-6 M and one 1/4" phone jack

Power Requirements
Station: 115/230 V, 50 - 60 Hz, 30 VA
System: Supply an external Clear-Com power supply

Dimensions
3.5" H x 19" W x 10" D
(89 x 483 x 254 mm)

Weight
12 lb (5.5 kg)

Product Spares List

Product Spare Part	Spare Part Description
710232	MS-812A REPLACEMENT MAINBOARD ASSY