Hear Technologies PROHB4 Hear Back PRO Four Pack with 4 Mixers and 1 Hub Frame/Network Card

This is it - the most comprehensive digital solution to get everyone the mix they need to perform their best. This new system platform is completely modular and infinitely expandable, which means it is the last personal monitoring system you’ll ever need.

Whether or not you've ever used a personal monitor mixer, the simple layout of this powerful system makes getting the right mix a quick and effortless experience. Based in Gigabit Ethernet, this framework paves the way for an impressive range of future possibilities.

The Hear Back PRO system consists of two main components: the Hub and the Mixer. The modular Hub consists of four card slots, which can be populated with any configuration of input and/or output cards to fit your exact needs. Each Hub has the ability to supply signal and power to as many as 32 Mixers (8 per Network Card), each over a single standard CAT6* cable. With the built-in HBUS In/ Out ports, multiple Hubs can be daisy-chained together, allowing for truly unlimited system expansion.

Key Features

• PRO Digital Overlay compatibility
• Local control of up to 138 channels of audio (128 channels + Stereo AUX IN + up to 4 stereo intercom inputs)
• Submix up to 16 stereo channels on each of the 16 knobs
• Volume/panning/stereo link control of all audio channels
• Remote control all settings from iOS App or another Mixer
• Receive power and audio over one Ethernet cable, up to 500' from Hub to each Mixer
• 24-bit Delta-Sigma D/A and A/D converters
• Store up to 4 recallable presets
• Intercom allows communication to anyone with a Hear Back PRO Mixer (up to 4 people at a time)
• 1/8' and 1/4' headphone outputs with 2.2 Watts of power per channel
• Balanced mono/stereo, line level outputs
• Selectable 1/8” TRS stereo unbalanced and XLR mono balanced (with 15V phantom power)
• Microphone input for crowd / ambiance mic or intercom use
• Drum module / metronome or local mix input
• Built-in 5/8” threaded socket to mount Mixer to any standard mic or desk standAllows 32 channel digital input cards (e.g., Dante, Waves, MADI)
• Up to 32 input channels per Hub
• Multiple Hubs daisy-chain for up to 128 input channels
• Mix and match input types (ex. Dante and Analog)
• Six user-selectable sample rates indicated by LEDs: 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz and 192kHz
• Less than .25 milliseconds total system delay (latency) from analog input to output
• 16 RGB LEDs intuitively display signal/peak levels for channel metering
• Standard CAT5e/6 cabling delivers power and signals to Mixers
• Daisy-chain via HBus for very large systems
• 1 RU chassis
• Modular I/O card-slot configurable mainframe
• Gigabit Ethernet network fabric
• 48V Power Over Ethernet supply

Technical Specifications

Mixer Aux Input
Line Input Configuration/Impedance
1/8” Stereo, unbalanced, 10K ohms typical
Line Input Level
0 dBu optimal, +18 dBu max
Mic Input Configuration/Impedance
XLR Mono, balanced, 150 ohms typical, 150 Hz high pass
Mic Input Level
-42 dBu optimal, -30 dBu max
Mixer Headphone Power
Load Impedance
THD less than 0.01%*
THD less than 0.1%
8 Ohms
1.2 W*
1.5 W
*THD AT 8 Ohms = 0.015% typical
16 Ohms
1.6 W
1.8 W
25 Ohms
2.0 W
2.2 W
32 Ohms
1.8 W
2.0 W
50 Ohms
1.5 W
1.6 W
100 Ohms
1.1 W
1.2 W
200 Ohms
500 mW
650 mW
600 Ohms
220 mW
250 mW
IMD
Typically, less than 0.03%
Mixer Line Output
Freq Response
20 Hz to 20 KHz, +/-0.15 dB
THD+N
0.004% typical at 1 kHz, +15 dBu
0.008% typical, 20 Hz - 20 kHz, +4 dBu
IMD
0.02% typical at +4 dBu, 60 Hz / 7 kHz
Crosstalk
Less than -93 dB @ 1 kHz
Propagation Delay
Analog Input to Analog Output
0.248 mSec @ 192 kHz sample rate
Digital Input to Analog Output
0.092 mSec @ 192 kHz sample rate
Digital Input to Digital Output
0.0452 mSec @ 192 kHz sample rate
Audio over Ethernet Protocol (HBUS)
0.000592 mSec
System Noise Performance
Noise, A-Weighted
-93 dBu @ 192 kHz sample rate
Dynamic Range
117 dB typical
System I/O
Hub Line In, Analog
8 balanced inputs on a DB-25 female (DA-88 pinout) per Analog Card
Hub Maximum Input Level, Analog
+8 dBu with analog card pad jumpers populated, +18 dBu with jumpers removed (up to +38dBu upon special request)
Hub HBus In, out
8-pin RJ45 jack (standard Ethernet pinout)
Hub USB Port
USB 2.0 (for firmware updates and editing configuration settings)
Hub Card Slots (4x)
Each slot can accept an analog or digital input card, output card, or 8 port Mixer network card
Mixer to Hub Connection
8-pin RJ45 jack (8x Mixer connections per network card)
Mixer Headphone Out
1x TRS 1/4” and 1x TRS 1/8” unbalanced stereo
Mixer Line Out
2x TRS 1/4” balanced (left/mono and right)
Mixer Max Output Level, Analog
+24 dBu (mixed output)
Mixer Aux Input
1x TRS 1/8” unbalanced stereo and 1x XLR balanced mono (with 15 volts phantom power)
Mixer Card Slot
For future digital or analog input/output expansion capabilities or side-car add-on
Physical, Mixer
Size
9.5” (241 mm) H x 5.95” (152 mm) W x 2.71” (68.8 mm) D
Unit Weight
1.6 lb. (0.72 kg)
Mounting
Standard mic stands (5/8” 27 threads per inch) or desk mounted
Physical, Hub
Size
1.75” (44.5 mm) H x 19” (483 mm) W x 8.5” (216 mm) D
Unit Weight
6.3 lb. (2.8 kg)
Mounting
Standard rack mount, 1 RU
Power
Hub Power Requirements
48VDC, 150 Watts (each external power supply powers up to 16 Mixers) **
Mixer Power Requirements
Power over Ethernet (PoE) 36-52 volts DC, 15 Watts max provided by Hub through Cat5e/6 network cabling
External Power Supply Requirements
Input Voltage: 90VAC to 264VAC 50/60 Hz