Hear Technologies - Freedom Back

Freedom Back

Wireless Stereo In-Ear System

Freedom Back is a high quality UHF wireless stereo in-ear monitor system designed to replace loud, bulky and unsightly stage monitors while allowing the talent the freedom to move about the stage. It is a perfect companion to our highly successful Hear Back personal monitor mixer system and the acclaimed Mix Back matrix monitor mixer.


Freedom Back

The Freedom Back system includes a transmitter with antenna, wireless stereo receiver, carrying case, and rack mount kit with an extension cable for mounting the antenna on the front panel. Freedom Back is available in UA and UB bands making it possible to utilize numerous units on a stage at one time. Band A operates from 584 - 608 MHz and band B operates from 655 - 679 MHz. With 120 channels per band, the user will be able to select frequencies that will not be subject to local TV station interference even after the impending FCC changes!

System Features

Transmitter Features:

  • 120 digitally selectable UHF channels
  • Up to 10 transmitters may be used in the same space, depending on local UHF interference
  • Stereo or Mono switch on the rear of the transmitter
  • Back-lit LCD display of frequency, audio level, group and channel
  • XLR and 1/4" combo input connectors
  • Built-in automatic limiter
  • Stereo headphone or in-ear monitor jack with volume control
  • PAD switch attenuates signal by 12 dB
  • External whip antenna can be front mounted with included rack ears and extension cable

Receiver Features:

  • Wireless stereo belt pack allows freedom to move about the stage
  • Unlimited receivers may be used with one transmitter, when on the same frequency
  • Back-lit LCD displays frequency, group, channel, battery indicator, and Mono/Stereo
  • Stereo headphone or in-ear monitor jack with volume control
  • RF present LED
  • Batteries included
Frequency Range and Transmitter Output Level
Bands: UA UB
Frequency Range: 584 ~ 608 MHz 655 ~ 679 MHz
Transmitter Output Level: 10 dBm 10 dBm
Channels: 120 (10 groups of 12 channels) (10 groups of 12 channels)
Operating Range: 330 ft (100 m) line of sight, under typical conditions Note:
Actual range depends on RF signal absorption, reflection, and interference.
Frequency Response (+/- 3 dB): 40 Hz ~ 16 KHz  
Total Harmonic Distortion
(+/- 30 KHz deviation, 1 KHz tone):
Dynamic Range: >90 dB A-weighted  
Operating Temperature Range: -10°C to +50°C Note: Battery characteristics may limit this range  
Max Audio Input Level: +6 dBV, +18 dBV with -12dB PAD engaged  
Gain Adjustment Range: 60 dB  
Input Impedance: 10 K Ohms unbalanced, 20 K Ohms balanced  
Dimensions: 1.5" H x 8.35" W x 3.78" D (38mm H x 212mm W x 96mm D)  
Gain Adjustment Range: 60 dB
Input Impedance: 10 K Ohms unbalanced, 20 K Ohms balanced  
Wireless Stereo Reciever
Audio Output Level: 100 mW  
Sensitivity: -94 dB for 30 dB SINAD, typical  
Image Rejection: >55 dB  
Dimensions: 3.74" H x 2.56" W x 0.98" D (95mm H x 65mm W x 25mm D)  
Weight: 3.52 oz (100 g) without batteries  
Power Requirements: 2 "AA" size Alkaline or rechargeable batteries  
Battery Life: Approximately 4 ~ 5 hours (alkaline), load and level dependent  

Note: 0 dBu = 0.775 Vrms. Specifications and features subject to change without notice.


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If you need help from our highly skilled Tech Support, the easiest and quickest way to get your solution is by phone. Hear Technologies is committed to providing you the industry's best customer service.

Max Sulkowski
Phone: 1-256-922-1200 ext. 135
Fax: 1-256-922-1221

For more information please see our Support page.

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