The D4 digital 4-channel wireless system was designed as a special purpose system for location production in film and television. A typical application for this system is in television production as part of what is commonly called a “bag system.” A portable mixer and several wireless microphone receivers are carried in an over-shoulder carrying case. The D4T transmitter is connected to the outputs of the mixer to transmit up to four audio channels to one or more D4R receivers mounted on video cameras.

In the 4-channel mode, the D4 system operates on one of four 4MHz channels in the 902 to 928 MHz band. Each channel carries four separate audio signals, digitally multiplexed within a common carrier. The audio quality is suitable for any professional application in film, television and live sound. 48kHz/24-bit audio, ruler-flat 20-20000Hz frequency response, ultralow distortion and high dynamic range assure excellent audio reproduction. Operating range is very similar to top of the line Digital Hybrid Wireless® microphone systems. The LCD interface makes setup simple and straightforward. Any external power source in the 9 to 16 Volt range may be used. Housings and panels are machined aluminum with electrostatic powder coated and anodized finishes and laser etched marking for durability.