KB-22, commentary box

• Designed for two commentators with their microphones and headphones
• One COMM output to talk with the studio for both commentators
• Listening 2 external line inputs, COMM port and mix output with the selection of listening to the left or right headphone specifically for each commentator
• Microphone input Gain adjustable from 20 to 70dB
• Separate output for each microphone plus the output from the mixed microphone signals
• PPM signal level meter mixed or a single microphone
• Mute switch with LED indication
• Button for cough and agreeing for each commentator
• All inputs and outputs derived from transformer symmetry

Commentary box is designed for independent operation of two commentators. Allows an independent output from both microphones or mixed output - MIX OUT. In particular there is output for communication with the studio or OB - COMM OUT. All outputs are derived through high-quality output transformers. Every commentator has a button for coughing, which also serves to to communicate with the studio trought COMM OUT output. Each commentator can independently listened and with corresponding knobs adjusts the listening 2 external line inputs, commentators A and B, COMM IN from studio and MIX OUT from commentary box. Commentator also can make a special mix for left and right headphone. Microphone signals in individual and collective action are measured through the built-in PPM meter with LED's.

MICROPHONE PREAMPLIFIER
- Input: transformer symmetry
- Input impedance: > 1.2KΩ
- Gain: min 26dB max 80dB
- Frequency range: 20Hz - 20kHz +/- 1dB
- The equivalent noise at input
- EIN: > 124dB (20Hz - 20kHz)
- Headroom: 26dB
- Mic MUTE: 83dB (20Hz - 20kHz); 93dB (400Hz - 20kHz)
- Cough MUTE: 83dB (20Hz - 20kHz)
- High pass filter: f = 65Hz

LINE INPUTS
- Input: transformer symmetry
- Input impedance: > 600Ω
- Gain: -10 do +20dB
- Gain in middle position: + 6dB
- Frequency range - Line 1-2: 20Hz - 20kHz ± 2dB/0dB
- Frequency range - Line COMM: 40Hz - 20kHz ± 1dB/0dB
- THD: <0.045% 1KHz
- Signal / noise: > 70dB
- Max input signal level: + 16dB

OUTPUTS
- Outputs: transformer symmetry
- Output impedance: > 50Ω
- Nominal output level: + 6dB
- Max output level: + 20dB

HEADPHONE AMPLIFIER
- Recommended headphone impedance: 600Ω
- Minimum headphone impedance: 33Ω
- THD: < 0.5%
- Max output level: 6.6V at 600Ω; 2.85V at 33Ω
- Frequency range: 20Hz 20KHz ± 1dB
- Crosstalk R>L: < -50dB 20Hz-10KHz
- Crosstalk L>R: < -50dB 20Hz-10KHz

POWER
- AC adapter: 230 na 2x15V
- Consumption: < 10W

TEMPERATURE
- Performance: 5 - 40°C
- Operating: 0 - 50°C

DELIVERY INCLUDES
- Device
- Power adapter
- User manual

Note: Specifications and designs are subject to change without notice.