Clear-Com KB-211 Intercom Speaker Station
The Clear-Com PL-Pro™ KB-211 is a two-channel speaker station designed for use in theatres, live performances, industrial environments, and small television facilities. It features speech intelligibility, even in high noise levels, and can be customized through its programmable options.
Allows selectable two-channel communications
Wide frequency response speaker with on/off switch
Intercom volume control
Operates with carbon or dynamic headsets
Mic on/off switch and adjustable sidetone
Visual Call Signaling
Portable or permanent installation
Solid 3/16″ machined aluminum front pane
Specifications:
Headset Microphone Pre-Amp
Input Type: Dynamic
Impedance: 1k ohm
Input Level: -55 dBV nominal; -10 dBV max.
Gain from headset mic to intercom line: +41 dB
Pre-Amp Response Curve
Frequency Response: 250 Hz to 12 kHz, contoured for intelligibility
Limiter Range: 20 dB
Headphone Amplifier
Load Impedance Range: 50 ohm to 2k ohm
Output Level: at least +20 dBV across 600 ohm
Distortion: < 0.5% THD at 1 kHz
Frequency Response: 200 Hz to 15 kHz, ±3 dB
Gain from intercom line: +37 dB
Power Output: 110 dB SPL
Speaker Amplifier
Speaker Type: 2.5 in. round, 16 ohm
Power Output: 2 W into 16 ohms
Frequency Response: 200 Hz to 15 kHz, ±3 dB
Signal-to-Noise: 75 dB
Gain from intercom line: +37 dB
Distortion: < 0.5% THD at 1 kHz
Speaker Level: 98 dB SPL at 3 ft.
Program Amplifier
(Transformerless, balanced differential input)
Input Level: -20 dBV
Input Impedance: > 100k ohm
Frequency Response: 150 Hz to 15 kHz, ± 3 dB
Power Requirements
Voltage: 30-VDC standard unit; 16 to 18 VAC with 4-Wire Option Module
Current: 100 mA average
Internal Connectors
Intercom: five-position, plug-on screw terminals
Program: three-position, plug-on screw terminals
AC Power
(4-Wire Option Module): two-position, plug-on screw terminals
Internal Controls
(1) Call Signal jumper; (3) Option switches; (1) Tone Alert Volume control
Front Panel Connectors
Headset: (1) XLR-4M
Front Panel Controls & Indicators
(1) Program Level control; (1) Intercom volume control; (1) Sidetone control; (1) Talk button; (1) Call button; (1) VOX control (KB211GM only); (1) Channel selector; (1) Speaker On-Off switch; (1) Talk LED; (1) Call LED
Environmental
32 to 122 F (0 to 50 C)
Dimensions
8.25 in. W x 4.5 in. H x 1.75 in. D (210 mm x 114 mm x 44 mm)
Weight
1.22 lbs. (0.56 kg)
The Clear-Com PL-Pro™ KB-211 is a two-channel speaker station designed for use in theatres, live performances, industrial environments, and small television facilities. It features speech intelligibility, even in high noise levels, and can be customized through its programmable options.
Allows selectable two-channel communications
Wide frequency response speaker with on/off switch
Intercom volume control
Operates with carbon or dynamic headsets
Mic on/off switch and adjustable sidetone
Visual Call Signaling
Portable or permanent installation
Solid 3/16″ machined aluminum front pane
Specifications:
Headset Microphone Pre-Amp
Input Type: Dynamic
Impedance: 1k ohm
Input Level: -55 dBV nominal; -10 dBV max.
Gain from headset mic to intercom line: +41 dB
Pre-Amp Response Curve
Frequency Response: 250 Hz to 12 kHz, contoured for intelligibility
Limiter Range: 20 dB
Headphone Amplifier
Load Impedance Range: 50 ohm to 2k ohm
Output Level: at least +20 dBV across 600 ohm
Distortion: < 0.5% THD at 1 kHz
Frequency Response: 200 Hz to 15 kHz, ±3 dB
Gain from intercom line: +37 dB
Power Output: 110 dB SPL
Speaker Amplifier
Speaker Type: 2.5 in. round, 16 ohm
Power Output: 2 W into 16 ohms
Frequency Response: 200 Hz to 15 kHz, ±3 dB
Signal-to-Noise: 75 dB
Gain from intercom line: +37 dB
Distortion: < 0.5% THD at 1 kHz
Speaker Level: 98 dB SPL at 3 ft.
Program Amplifier
(Transformerless, balanced differential input)
Input Level: -20 dBV
Input Impedance: > 100k ohm
Frequency Response: 150 Hz to 15 kHz, ± 3 dB
Power Requirements
Voltage: 30-VDC standard unit; 16 to 18 VAC with 4-Wire Option Module
Current: 100 mA average
Internal Connectors
Intercom: five-position, plug-on screw terminals
Program: three-position, plug-on screw terminals
AC Power
(4-Wire Option Module): two-position, plug-on screw terminals
Internal Controls
(1) Call Signal jumper; (3) Option switches; (1) Tone Alert Volume control
Front Panel Connectors
Headset: (1) XLR-4M
Front Panel Controls & Indicators
(1) Program Level control; (1) Intercom volume control; (1) Sidetone control; (1) Talk button; (1) Call button; (1) VOX control (KB211GM only); (1) Channel selector; (1) Speaker On-Off switch; (1) Talk LED; (1) Call LED
Environmental
32 to 122 F (0 to 50 C)
Dimensions
8.25 in. W x 4.5 in. H x 1.75 in. D (210 mm x 114 mm x 44 mm)
Weight
1.22 lbs. (0.56 kg)