Product Overview
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.
Hear Technologies HEAR-BACK-FOUR-PACK Features:
- Virtually unlimited system size
- Very attractive pricing
- Excellent audio fidelity
- Built-in DSP Limiter
- Very long digital lines possible without loss of audioquality
- Audio inputs ADAT, analog, and the HearBus are switchselectable from the front panel.
- Local control of up to ten channels of audio (8 inputsplus a stereo Aux input) Master Volume (controls the level to the headphones,line outs and the Aux input to the line outputs)
- Built-in DSP Limiter (designed as a “brick wall”limiter for hearing protection and to protect monitor wedges from overload)
- Headphone amplifier fault indicator in case of overtemperature, or a short, the red LED comes on to alert the user something is aproblem.
- A second visual trouble shooting aid for the user isthe Bus status indicator
- Link Indicators – Whenever two pairs of mono inputsare linked for stereo operation the link LED is illuminated
- Standard CAT5E power and signal Connection, costeffective, simple, non-obtrusive way to connect eight channels of audio. TheCable is held in place with a “built-in cable strain relief”
- Balanced Line-Outs, Mono/Stereo
- Stereo AUX In
- Built-in Mic Stand Mount may be mounted to a standardmic stand or clipped onto a stand extension bar or clip
- High Power – Low Distortion Headphone Amplifiers
- One of the industry's most powerful headphone amplifiers
Hear Technologies HEAR-BACK-FOUR-PACK Specifications:
- Aux Input
- * Input Configuration/Impedance: Stereo, Unbalanced, 10 kohms typical
- * Input Level: +4 dBu optimal, +22 dBu max
- Head Phone Power
- * LoadImpedance
- * THD less than0.01%
- * 8 ohms: 150 mW (THD at 8ohms=0.015% typical)
- * 16 ohms:235 mW
- * 25 ohms: 675mW
- * 32 ohms: 950mW
- * 50 ohms: 1.6W
- * 100 ohms: 1.14W
- * 200 ohms: 500mW
- * 600 ohms: 215mW
- * THD less than0.1%
- * 8 ohms: 230mW
- * 16 ohms: 500mW
- * 25 ohms: 775mW
- * 32 ohms: 1.1W
- * 50 ohms: 1.8W
- * 100 ohms: 1.25W
- * 200 ohms: 650mW
- * 600 ohms: 220mW
- *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, +15dBu, 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 dB analog, -97 dBu optical
- * Dynamic Range: 112dB typical
- System I/O
- * Hub Line In, Analog: 8 Balanced input son DB-25 female (Tascam DA-88 pinout)
- * Maximum Input Level, Analog: +15 dBu
- * Hub Light Pipe In: Industry standard fiber optic connector, shuttered
- * Hub HearBusIn, 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
- Mixer Dimensions
- * Size (HxWxD): 11.5" x 5.2" x 3.6"
- * Unit Weight: 1.2 lbs (0.54 kg)
- * Mounting: Standard mic stand or desk mount
- Hub Dimensions
- * Size (HxWxD): 1.75" x 19" x 7.125"
- * Unit Weight: 5.0 lbs
- Mounting: Standard Rack Mount, 1 RU
