The original U1- U6 frequencies have been permanently discontinued, and are no longer available. These receivers will only work with N1-N6 frequency receivers.
This receiver works with either the CT7 beltpack or the AH1 Airline headset transmitter.
The core of the receiver system is the CR77 true-diversity half-rack UHF receiver. It works flawlessly with all AirLine and Concert UHF transmitters (on current N-Series Frequencies). Featuring a front panel display with large multi-segment audio level and RF level LED meters, and a large rotary volume knob that allows easy adjustment of audio output, the CR77 takes all of the guesswork out making your wireless system perform.
Its synthesized PLL frequency control circuitry keeps the signal locked and true while dual tuned molded antennas with LEDs monitor the true-diversity operation. The rear panel features balanced XLR and unbalanced 1/4-inch outputs allowing flexible connection options. In addition, two CR77 receivers can be rackmounted together in a single space rack adapter available as an added accessory.