Hear Back PRO User Guide
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 dBu
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 dBu @ 1 kHz
0.248 mSec @ 192 kHz sample rate
0.092 mSec @ 192 kHz sample rate
0.0452 mSec @ 192 kHz sample rate
0.000592 mSec
-93 dBu @ 192 kHz sample rate
117 dB typical
8 Balanced inputs on a DB-25 female (DA-88 pinout) per Analog Card
+2 dBu with analog card pad jumpers populated, +12dBu with jumpers removed
(up to +38dBu upon special request)
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)
1x TRS 1/4” and 1x 1/8” unbalanced stereo
TRS 1/4” balanced (2 connections: left/mono, 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” (7.62 mm) D
1.6 lb. (0.72 kg)
Standard mic stand (5/8” 27 threads per inch) or desk mounted
1.75” (45 mm) H x 19” (482 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 CAT6**
network cabling
Input Voltage: 90VAC to 264VAC 50/60Hz
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:
Analog Input to Analog Output:
Digital Input to Analog Output:
Digital Input to Digital Output:
Audio over Ethernet Protocol (HBUS):
System Noise Performance
Noise, A-Weighted:
Dynamic Range:
System I/O
Hub Line In, Analog:
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:
THD less than 0.1%
1.5 W
1.8 W
2.2 W
2.0 W
1.6 W
1.2 W
650 mW
250 mW
TECHNICAL SPECIFICATIONS
Cabling, Mixers and HBUS
CAT6** cables used for Mixers or for HBUS can be run up to 500 feet in ideal conditions (one piece of solid conductor CAT6 with no breaks or
couplings). The more breaks/connections/couplings in a cable run, the more limited this distance will be. Poor quality cabling will also limit the
maximum distance.
13
Note: 0 dBu = 0.775 Vrms. Specifications and features subject to change without notice.
**Cable complying with the National authorities (cable with an outer jacket or sleeving rated VW-1 or better).
***Hub is capable of powering up to 32 Mixers with an additional power supply.
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