Panel Microphone Input
Input Type:Electret
Input Impedance:>=2KΩ
Mic Limiter Threshold:0dBu ±3Db
Mic Limiter Range (MS-704 & RM-704):>= 20dB

Headset Microphone Input
Input Type:Dynamic
Input Impedance:>= 1KΩ
Mic Limiter Threshold:0dBu ±3dB
Mic Limiter Range (MS-704 & RM-704):>= 17dB

Program Line Input
Maximum Level before Clipping:>= 20dBu
Input Impedance:>= 5KΩ

Headset Output
Load Impedance:>= 8Ω
Output Impedance:<= 25Ω
Output Limiter Threshold:+5dBu ± 3dB
Maximum Output Level before Distortion:>= 17dBu

Speaker Output
Load Impedance:>= 4Ω
Max Output Level before 1% Distortion:20dBu ± 2dBu

Party Line Output
Off Noise:< -74dBu
Output Impedance:>10KΩ

Party Line Input
Crosstalk:< -60dB
Max level before Clipping:>= 12dBu
Sidetone Null Capability:> 25dB
Stage Announce/Balanced Line Out
Output Impedance:>= 200Ω
Load Impedance:>= 600Ω

IFB/Hot Mic
Output Impedance:150Ω
Load Impedance:>= 600Ω

Frequency Response
Panel Mic - Party Line:600 - 10KHz ± 3Db
Headset Mic - Party Line:200 - 12KHz ± 3dB
Headset Mic - Line Out:200 - 12KHz ± 3dB
Program Input - Party Line:100 - 17KHz ± 3dB
Program Input - Headset Out:200 - 10KHz ± 3dB
Program Input - Speaker Out:300 - 10KHz ± 3dB
Party Line - Headset Out:200 - 10KHz ± 3dB
Party Line - Speaker Out:300 - 10KHz ± 3dB

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