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Hear Technologies Hear Back Pro Four Pack - Personal Monitor System (Waves SoundGrid Input)

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(4) PRO Mixers, (1) Hub Frame, (1) Waves card, (1) Network Card, (4) 50' CAT6, (1) Tote Back, (5) Blank Overlays 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 expan... Read More

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(4) PRO Mixers, (1) Hub Frame, (1) Waves card, (1) Network Card, (4) 50' CAT6, (1) Tote Back, (5) Blank Overlays

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 ever need.

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 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/6 cable. And with the built-in HBus In/Out ports, multiple Hubs can be daisy-chained together, allowing for truly unlimited system expansion.


  • Modular I/O Hub card system allows for system customization
  • Large master knob controls overall main mix, AUX, and intercom levels independently
  • Volume and panning control of all channels
  • Direct and immediate visual feedback of all 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
  • 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
  • HBUS In/Out connections allow daisy-chaining Hubs and a wireless access point connection for use with the PRO's iOS App
  • Side-mounted card slot on Mixer for future expansion
  • 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
  • Hear Back PRO iOS App allows for complete control of all Mixers connected to the network

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Product Specs

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: Less than 0.25 mSec @ 192 kHz sample rate
System Noise Performance
Noise, A-Weighted: -93 dBu @ 192 kHz sample rate
Dynamic Range: 117 dB typical
System I/O
Hub Line In, 2x Analog Input Cards: 16 Balanced inputs on 2x DB-25 female (DA-88 pinout)
Hub Maximum Input Level, Analog: +18 dBu
Hub HBus In, Out: 8-pin RJ45 jack (standard Ethernet pinout)
Hub USB Port: USB 2.0 (for firmware updates)
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: TRS 1/4" and 1/8" unbalanced stereo
Mixer Line Out: TRS 1/4" balanced (2 connections: left/mono and right)
Mixer Max Output Level, Analog: +24 dBu (mixed output)
Mixer Aux Input: TRS 1/8" unbalanced stereo and 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 stand (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
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

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