Hear Technologies HEAR-BACK-MIXER
Headphone Mixer for use with Hear Back System

HEAR-BACK-MIXER

A basic Hear Back system consists of a Hub and personal Mixers connected using standard CAT5E cables. A single Hub supplies signal and power to a maximum of eight Mixers. That’s one for you and everybody in the band. If that’s not enough, the Hubs can be daisy-chained using the HearBus In and Out for virtually unlimited system size. The Hear Back Hub can accept analog input signals from audio mixers, auxiliary, matrix, monitor, and/or direct outputs.

The ADAT input can come from digital audio workstations, digital recorders, or digital mixers. For front of house or remotely located digital mixers, we also have the Extreme Extender ADAT In/Out that converts ADAT optical, which has very limited distance, to the HearBus for transmission of up to 500 feet.

Features:

• Local control up to ten channels of audio
• Master volume
• Built-in DSP limiter
• 24-bit D/A converters
• Less than 1.5 millisecond total system delay
• Bus status indicator
• Headphone amplifier fault indicator
• Link indicators
• Standard CAT5E power and signal connection
• Balanced line outs, mono/stereo
• Stereo AUX in:
      * Expand numbers of mixers
      * Drum module/metronome input
• Built-in standard threaded mic stand mount

Specifications:

• Aux Input
      * Input Configuration/Impedance: Stereo, Unbalanced, 10 kohms typical
      * Input Level: +4 dBu optimal, +22 dBu max
• Head Phone Power
      * Load Impedance, THD < 0.01%:
        * 8 ohms: 150 mW (THD at 8 ohms=0.015% typical)
        * 16 ohms: 235 mW
        * 25 ohms: 675 mW
        * 32 ohms: 950 mW
        * 50 ohms: 1.6 W
        * 100 ohms: 1.14 W
        * 200 ohms: 500 mW
        * 600 ohms: 215 mW
      * Load Impedance, THD < 0.1%:
        * 8 ohms: 230 mW
        * 16 ohms: 500 mW
        * 25 ohms: 775 mW
        * 32 ohms: 1.1 W
        * 50 ohms: 1.8 W
        * 100 ohms: 1.25 W
        * 200 ohms: 650 mW
        * 600 ohms: 220 mW
      * IMD: Typically less than 0.03%
• Line Out
      * Frequency Response: 20 Hz to 20 kHz, +0.04 dB, -0.55 dB
      * THD+N: 0.008% typical at 1 kHz, +15 dBu, 0.02% typical, 20 Hz-20 kHz, +4 dBu
      * IMD: 0.02% typical at +4 dBu, 60 Hz/7 kHz
      * Crosstalk: Better than -85 dB @ 1 kHz
      * Propagation Delay: less than 1.5 mSec. Hub input to mixer output using 500' of cable
• Noise Performance
      * Noise, A-Weighted: -91 dBu analog, -97 dBu optical
      * Dynamic Range: 112 dB typical
• System I/O
      * Hub Line In, Analog: 8 Balanced inputs on DB-25 female (Tascam DA-88 pinout)
      * Maximum Input Level, Analog: +15 dBu
      * Hub Light Pipe In: Industry standard fiber optic connector, shuttered
      * Hub HearBus In, Out: 8-pin RJ45 jack (2 each)
      * Mixer Headphone Out: TRS 1/4" unbalanced stereo (2 each)
      * Mixer Line Out: TRS 1/4" balanced (2 each)
      * Maximum Output Level, Analog: +24 dBu (mixed output)
      * Aux Input: TRS 1/8" unbalanced stereo
• Mounting: Standard mic stand or desk mount
• Dimensions(H x W x D): 11.5" x 5.2" x 3.6" (29.2 x 13.2 x 9.15 cm)
• Weight: 1.2 lbs. (0.54 kg)

Our Part #  HEAR-BACK-MIXER