Prospect C6R IFB talkback unit

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.

Prospect C6R IFB talkback unit is in stock 

In addition to providing standard 4-wire operation on each channel, all models offer great flexibility in applications requiring signal-interrupt or IFB operation. Four IFB inputs are provided, which are bus-connected to a 4-position rotary selector switch on each channel and are accessible through the top panel of the unit. Each channel can be independently configured on rear-panel switches to enable the microphone signal either to be routed to the channel output without interrupting a standing signal; to interrupt the pre-selected IFB input to the channel; or to interrupt the channel’s own reverse talkback input. A front-panel IFB/RTB MON switch on each channel enables either the IFB or RTB signal to be monitored on LS and headphones. Six internal configuration switches on each channel also enable these and other functions to be independently controlled as follows: 1 The IFB/RTB MON switch can be disabled, ensuring that only the RTB input is monitored. 2 The signal driving the CALL LED can be set to be either the RTB input signal or the signal being monitored, as selected by the IFB/RTB MON switch. 3 The selected IFB or RTB signal can be set to mix with the TALK signal, without being interrupted. 4 The LS DIM function can be disabled when not required on that channel. 5 The GROUP TALK function can be enabled or disabled, as required. 6 When two “KD” units are used in linked mode, the channel can be switched to local control only. Gooseneck and headset microphones have separate pre-amplifier stages, which allow the gain to be independently adjusted internally. The required input is selected on the front-panel SEL MIC switch. When H/S (headset mode) is selected, the LS CUT switch is automatically activated, although it remains operational, allowing the LS to be switched on while in headset mode. An internal switch enables either microphone to be selected as the default at power-up. When it is necessary to ensure that default settings are not overridden, both the SEL MIC and LS CUT switches can be independently disabled internally. Both microphone inputs can be independently configured internally to be balanced, phantom powered or unbalanced. The front-panel TALK LEVEL pot adjusts the signal level after the microphone limiter to set the peak output level at all outputs, and two LED’s indicate when this exceeds 0dBU and +8dBU. The TALK switches have a momentary action but will latch in the ON state when pressed briefly, although the latching action can be disabled by means of the rear-panel TALK LATCH switch. The rear-panel MIC OUT connector provides an continuous, linelevel output of the microphone signal. The monitor level of the signal, selected by the “IFB/RTB MON” switch on each channel, is adjusted by the channel MON control; and the LS LEVEL control adjusts the level of the mix of these signals fed to the LS and headphones. The front-panel LS DIM control operates on all channels and can be adjusted between full ON and full OFF. It operates when any TALK switch is pressed, or when enabled externally by linking pins 1&2 on the rear-panel LS CONTROL connector. The connector also provides an active-low output on pin 2 when the internal LS DIM function operates. The loudspeaker is switched off when either the front-panel LS CUT switch is pressed or when disabled externally by linking pins 1&3 on the rear-panel LS CONTROL connector. This also provides an active-low output on pin 3 when the LS CUT mode is on. LS CUT is indicated by a flashing red LED when operated by the switch, and a continuous indication when enabled externally. A rear-panel LS OUT jack is provided to enable an external 8 ohm passive loudspeaker to be connected, which cuts the internal loudspeaker.