Hear Technologies

HEAR BACK PRO SPECIFICATIONS
 
      PRELIMINARY DATA  
  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 mW
 
  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  
  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  
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.