1U rack-mount Talkback Units
The K-series range of 1U, rack-mount talkback units provides up to eight channels of 4-wire communications for a small studio or outside broadcast vehicle. The range includes several models, each of which enables the user to configure each channel independently to provide different routing, monitoring and control functions to suit the application.
- Six and eight-channel versions, each channel selectable to 4-wire co-ord or IFB operation.
- Shared control option allows two units to be linked to enable simultaneous operation from two positions.
- Four IFB bus inputs plus input loop-through IFB selectable on each channel.
- Monitoring of IFB and reverse talkback inputs on each channel.
- 2-wire mode selectable on one channel, with or without IFB feed.
- Independent gain setting for headset and stalk microphones with LED indication of talkback output level.
- Headset or stalk microphone selectable manually and by default at power-up.
- External I/O control for LS CUT & DIM.
- Power output to external LS.
- Universal mains power input.
- Optional wide-range DC power input.
- Optional TALK-switch GPI outputs.
- Independent configuration of each channel to select the required routing, monitoring and control functions.
| Microphone Inputs: Gooseneck Mic | |
| Connector | XLR3 socket |
| Input Impedance | Transformer coupled for 200 ohm dynamic microphone, 24V phantom power for electret microphone or unbalanced (pins 1 & 3 screen) |
| Sensitivity | Adjustable -65dBU to -45dBU for limiting at output |
| Headset Mic | |
| Connector | XLR5 socket |
| Input Impedance | Transformer coupled for 200 ohm dynamic microphone, switchable balanced on pins 1 & 2 (pin 3 screen), with or without 24V phantom power for electret microphone or unbalanced on pin 2 (pin 1 screen) |
| Sensitivity | Adjustable -65dBU to -45dBU for limiting at output |
| Talk Switches | |
| Operation | Momentary or latching when pressed briefly (if enabled) |
| GPI Output (OPTIONAL) | Relay closures to floating common connection on 9-way “D” plug |
| Line Outputs | |
| Connectors | XLR3 plug |
| Output Impedance | 200 ohms, transformer coupled |
| Peak Output Level | +14dBU |
| Line Inputs | |
| Connectors | XLR3 socket |
| Input Impedance | 10k ohms, transformer coupled |
| Input Sensitivity (MON) | -10dBU for maximum undistorted LS output |
| Input Gain (IFB) | 0dB |
| Call LED Threshold | -12dBU, 300Hz < f < 3kHz |
| Call LED Hold Time | 3-4S after signal ends |
| 2-Wire Operation (CHANNEL 1) | |
| Connectors | Channel 1 input, output or both |
| Mode | Full-duplex with headphones, half-duplex with LS |
| I/O Impedance | 10k ohm (listen only), 600 ohm (when TALK or IFB enabled) |
| L.S. Amplifier | |
| Connector | 6.4mm mono jack |
| Output Power | Peak 6W, continuous 3W into 8 ohms load (internal or external LS) |
| Phones Output | |
| Connectors | 6.35mm stereo jack - output on both tip & ring, sleeve to ground XLR5 socket - output on pins 4 & 5, pin 3 to ground |
| Output Level | 7.5V rms (max), 100 ohms impedance |
| Output Impedance | 100 + 100 ohms |
| Power Input: Standard Mains Power | |
| Connector | IEC plug (panel-mount on K6R & KD6R; fixed lead on K8R & KD8R) |
| Supply Voltage | 100 to 240V AC, 47 to 63Hz, 15W |
| DC Power (OPTIONAL) | |
| Connector | XLR4 plug - 0V & ground on pins 1 & 2, +ve supply on pins 3 & 4 |
| Supply Voltage | +9V to +36V DC, 15W |
| Physical | |
| Dimensions | W482mm H44mm D350mm (1U) |
| Weight | 4kg |
| Finish | Dark grey front panel |
