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2-Channel Select Flush-Mount Headset/Speaker Station with Mic Jack and Vox, Mounts in V-Box (as show in picture below), HelixNet S-Mount, or console.

KB-702 GM provides a remote speaker station permits the user to select between two channels of party-line communications, with the ability to talk and/or listen on the selected channel. The user can listen via the integrated speaker, or may use a headset or telephone-style handset – and can talk via a headset mic, a telephone handset, or a push-to-talk microphone. KB-702 also includes gooseneck microphone (GM-9/GM-18 or GN-250/ GN-450) connector options, with adjustable VOX feature and mic/ headset switch.

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Technical Specifications

Panel Microphone Input
Input Type: Electret
Input Impedance: >=2KΩ
Mic Limiter Threshold: -2dBu ±3dB
Mic Limiter Range: >= 15dB

Headset Microphone Input
Input Type: Dynamic
Input Impedance: >= 1KΩ
Mic Limiter Threshold: -2dBu ± 3dB
Mic Limiter Range: >= 15dB

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

Frequency Response
Panel Mic – Party-line: 300 – 16KHz ± 3dB
Headset Mic – Party-line: 300 – 15KHz ± 3dB
Program Input – Headset Out: 200 – 18KHz ± 3dB
Program Input – Speaker Out: 200 – 18KHz ± 3dB
Party-line – Headset Out: 200 – 18KHz ± 3dB
Party-line – Speaker Out: 200 – 18KHz ± 3dB

Max Distortion
Panel Mic – Party-line: <= 0.5%
Headset Mic – Party-line: <= 0.5%
Program Input – Headset Out: <= 0.2%
Program Input – Speaker Out: <= 0.5%
Party-line – Headset Out: <= 0.2%
Party-line – Speaker Out: <= 0.5%

Panel Mic – Party-line: < -65dBu
Headset Mic – Party-line: < -70dBu
Program Input – Headset Out: < -60dBu
Program Input – Speaker Out: < -60dBu
Party-line – Headset Out: < -50dBu
Party-line – Speaker Out: < -50dBu

Max Gain
Panel Mic – Party-line: >= 37dB
Headset Mic – Party-line: 41dB ± 2dB
Program Input – Headset Out: >= 18dB
Program Input – Speaker Out: >= 24dB
Party-line – Headset Out: >= 34dB
Party-line – Speaker Out: >= 40dB

Input Voltage Range: 20-30 VDC
Input Current (Idle): <= 90mA
Input Current (Max): <=110mA

Internal Adjustments and Connections
Intercom: Line Five terminal connector
Program Input Three terminal connector
Option Switches: Three DIP switches
Call Signal Jumper3: Three sets of options jumpers
Call Alert Tone Level Control: Level adjustment control

Front Panel Connectors
Panel Mic: (1) 1/4 in. (0.64 cm) panel mounting jack
Headset: (1) XLR-4M

Front Panel Controls & Indicators
(1) Panel /headset mic switch
(1) Program monitor level control
(1) Sidetone null control
(1) Talk button
(1) Call button
(1) Speaker ON-OFF switch
(1) Channel select switch
(1) Speaker volume control
(1) VOX control
(1) VOX indicator

32 – 122˚F (0 – 50˚C)

8.25 in. W x 4.5 in. H x 1.75 in. D
(210 mm x 114 mm x 44 mm)

1.1 lbs. (0.50 Kg)

Product Spares List

Product Spare Part Spare Part Description
810492Z KB-702/KB-702GM MANUAL


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  1. Brochures

    • Wired Communication Brochure6.45 MB  Download
  2. User Manuals

    • Encore Partyline Installation Manual2.08 MB  Download
    • KB-702/KB-702GM Manual613 KB  Download
  3. Datasheet