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PRELIMINARY DATA
This is it – the simplest, most affordable 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 has
become the last personal monitoring system you’ ll e ver need.
Introducing the latest addition to the Hear T echnologies family – Hear Back PRO.
With this system, there is no learning curve. 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: Hub & Mixers
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
CAT5e cable. And with the built-in HBus In/Out ports, multiple Hubs can be daisy-chained
together, allowing for truly unlimited system expansion.
The standard Hub (included in the “4-pack”) comes pre-loaded with one Network Card and
two 8-channel Analog Input Cards which can accept input signals from an audio mixer via
auxiliary, matrix, monitor, and/or direct outputs.
The Hear Back PRO boasts many key advantages, including:
• Side-mounted card slot on Mixer for
future expansion
• Large master knob controls overall
main mix, AUX, and intercom levels
independently
• Volume and panning control of all
16 channels
• Direct and immediate visual feedback of
all 16 channels
• Up to 8 pairs of stereo-linked channels
• Support for sampling rates up to 192 kHz
• Selectable XLR or 1/8” Mixer AUX input
• Built-in intercom broadcasts the AUX
source (mic, MP3 player, click, etc.)
• Intercom auto adjusts its own level
so even the quietest message never
goes unheard
• Modular I/O Hub card system lets you
customize the system to match your
configuration, and can adapt to your needs
• Supports secondary power supply to
provide redundancy and power to up to
32 Mixers
• USB port on Hub makes updating firmware
for future features and upgrades a simple
drag-and-drop operation
• Status indicating logos on Hub and Mixers
make it easy to detect and diagnose
problems, should they arise
• Write session info and channel settings
on storable Mixer overlays for an unlimited
number of presets
– Instantly store and recall presets from
memory with the push of a button
– Most recent configuration is saved, even
after power-down
Hub Features:
• Three switch selectable 16-channel
input sources:
– Input A (Slots 1 & 2)
– Input B (Slots 3 & 4)
– HBus
• 24-bit Delta-Sigma A/D converters
• Six user-selectable sample rates, indicated
by LEDs: 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz,
176.4 kHz, and 192 kHz
• 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 cabling deliver s po wer 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
Mixer Features:
• Local control of up to 18 channels of audio
(16 mono channels + AUX IN + Intercom IN)
• 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
• Volume/panning/stereo link control of all
16 channels of audio
• Store up to 4 recallable presets
• Intercom allows communication to anyone
with a Hear Back PRO Mixer
• Selectable 1/8” TRS stereo unbalanced and
XLR mono balanced (with 15V phantom
power) AUX inputs:
– Microphone input for cro wd / ambiance
mic or intercom use
– Drum module / metronome or
local mix input
• 1/8” and 1/4” headphone jacks
• Balanced mono/stereo, line level outputs
Hear Back PRO is proudly designed & assembled
in the U.S.A. by musicians and audio engineers.
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hear back PRO | mixer
1 - LED Status Indicator
2 - LED Level Indicators
3 - Volume/Pan Control Knob for
Each Audio Channel
4 - “Intercom” Button
5 - “Preset” Button
- “Master” Control Knob (Volume / Aux / Pan)
6
7 - “Aux” Input Button
8 - “Pan” Button
9 - Auxiliary 1/8” Stereo Unbalanced Audio Input
10 - Auxiliary Input Switch
11 - Auxiliary Balanced XLR Microphone Input
with 15V Phantom Power
- 1/4” Balanced Left/Mono and Right Outputs
12
13 - 1/8” Headphone Output
14 - 1/4” Headphone Output
15 - Gigabit Ethernet (GbE) Connection with
PoE+ (Power over Ethernet)
hear back PRO | hub
1 - LED Status Indicator
2 - Sample Rate LED Indicators
- Audio Input Channels 1-16 Level
3
LED Metering
4 - Input Selector Switch
5 - AC Power Switch
6 - Main 48V Power Input
7 - Secondary 48V Power Input
8 - HBus Input
9 - HBus Output
10 - USB Connection
11 - Card Slot 1, 8-channel Analog Input
12 - Card Slot 2, 8-channel Analog Input
13 - Card Slot 3 (future input/output card)
14 - Card Slot 4, 8-port Network Input
FRONT PANEL
REAR PANEL
TOP
BOTTOM
Hook-up Diagram
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PRELIMINARY DATA
Technical Specifications
Mixer Aux Input
Line Input Configuration/Impedance:
Line Input Level:
Mic Input Configuration/Impedance:
Mic Input Level:
Mixer Headphone Power
Load Impedance:
8 Ohms:
16 Ohms:
25 Ohms:
32 Ohms:
50 Ohms:
100 Ohms:
200 Ohms:
600 Ohms:
Inter Modulation Distortion:
Mixer Line Output
Frequency Response:
THD+N:
Inter Modulation Distortion:
Crosstalk:
Propagation Delay:
System Noise Performance
Noise, A-Weighted:
Dynamic Range:
Note: 0 dBu = 0.775 Vrms. Specifications and features subject to change without notice.
**Hub is capable of powering up to 32 Mixers with an additional power supply.
1/8” Stereo, unbalanced, 10K ohms typical
0 dBu optimal, +18 dBu max
XLR Mono, balanced, 150 ohms typical, 150 Hz high pass
-42 dBu optimal, -30 dBu max
THD less than 0.01%*
1.2 W*
*THD AT 8 Ohms = 0.015% typical
1.6 W
2.0 W
1.8 W
1.5 W
1.1 W
500 mW
220 mW
Typically less than 0.03%
20 Hz to 20 kHz, +/-0.15 dB
0.004% typical at 1 kHz, +15 dBu
0.008% typical, 20 Hz – 20 kHz, +4 dBu
0.02% typical at +4 dBu, 60 Hz / 7 kHz
Less than -93 dB @ 1 kHz
Less than 0.25 mSec @ 192 kHz sample rate
-93 dBu @ 192 kHz sample rate
117 dB typical
THD less than 0.1%
1.5 W
1.8 W
2.2 W
2.0 W
1.6 W
1.2 mW
650 mW
250 mW
System I/O
Hub Line In, 2x Analog Input Cards:
Hub Maximum Input Level, Analog:
Hub HBus In, Out:
Hub USB Port:
Hub Card Slots (4x):
Mixer to Hub Connection:
Mixer Headphone Out:
Mixer Line Out:
Mixer Max Output Level, Analog:
Mixer Aux Input:
Mixer Card Slot:
Physical, Mixer
Size:
Unit Weight:
Mounting:
Physical, Hub
Size:
Unit Weight:
Mounting:
Power
Hub Power Requirements:
Mixer Power Requirements:
External Power Supply Requirements:
16 Balanced inputs on 2x DB-25 female (DA-88 pinout)
+18 dBu
8-pin RJ45 jack (standard Ethernet pinout)
USB 2.0 (for firmware updates)
Each slot can accept an analog or digital input card,
output card, or 8 port Mixer network card
8-pin RJ45 jack (8x Mixer connections per network card)
TRS 1/4” and 1/8” unbalanced stereo
TRS 1/4” balanced (2 connections: left/mono and right)
+24 dBu (mixed output)
TRS 1/8” unbalanced stereo and XLR balanced mono
(with 15 volts phantom power)
For future digital or analog input/output expansion
capabilities or side-car add-on
9.5” (241 mm) H x 5.95” (152 mm) W x 2.71” (68.8 mm) D
1.6 lb. (0.72 kg)
Standard mic stand (5/8” 27 threads per inch)
or desk mounted
1.75” (44.5 mm) H x 19” (483 mm) W x 8.5” (216 mm) D
6.3 lb. (2.8 kg)
Standard rack mount, 1 RU
48VDC, 150 Watts
(each external power supply powers up to 16 Mixers)**
Power over Ethernet (PoE) 36-52 volts DC, 15 Watts max
provided by Hub through Cat5e network cabling
Input Voltage: 90VAC to 264VAC 50/60 Hz
OTHER HEAR TECHNOLOGIES PRODUCTS
• Unlimited system size
• Local control of 8 audio channels
(stereo mix and six “more-me’s”)
• ADAT, analog, HearBus inputs are
switch-selectable from front panel
• Built-in DSP Limiter with threshold
adjustment
• Affordable 16 x 12 x 2 x 2 monitor mixer
• 16 Mic/Line inputs each with passive split
and 2 stereo and 12 mono level controls
• 16 master outputs each available as analog,
ADAT, and HearBus
• Pin 1 lift and Mic phantom power switches
• Dual switch-selectable effects sends
• Stereo Aux inputs
• Channel Inserts
• Four-band EQ with dual sweepable mids
• Talkback with intercom and optional remote control
• Master Volume
• Stereo AUX In
• Balanced Line-Outputs
• Built-in Mic Stand Mount
• Standard CAT5e power
• High quality UHF Wireless Stereo In-Ear
Monitor system
• Available in UA (584 – 608 MHz) and
UB (655 – 679 MHz) bands
• 120 digitally selectable UHF channels
Hear Technologies
991 Discovery Drive
Huntsville, AL 35806
®
www.HearTechnologies.com
Phone: 1-256-922-1200
Fax: 1-256-922-1221
Printed in U.S.A. ©2014
Jun 2014
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