The Hear Technologies Hear Back PRO 4-Pack Personal Mixing System includes 1 x Hear Back PRO Hub and 4 x Hear Back PRO Mixers. The system features 1 x 1/8" (3.5 mm) TRS stereo mini-jack input, 1 x XLR 3-pin microphone input, and 1 x RJ45 input. Outputs include 2 x 1/4" TRS balanced line outputs, 1 x 1/4" TRS unbalanced stereo headphone jack, and 1 x 1/8" (3.5 mm) unbalanced stereo headphone mini-jack. Phantom power is provided at 15 V for XLR input. A/D and D/A conversion is 24-bit Delta-Sigma. Maximum input level is Aux Input: +18 dBu (0 dBu optimal) Mic Input: -30 dBu (-42 dBu optimal). Maximum output level is +24 dBu. Dynamic range is 117 dB typical. Noise is -93 dBu at 192 kHz sample rate (A-weighted). Impedance is Aux Input: 10 kOhms typical, Mic Input: 1 kOhm, 150 Hz high-pass filter. Frequency response for line outputs is 20 Hz to 20 kHz (±0.15 dB). THD + N for line outputs is 0.004% typical (at 1 kHz, +15 dBu), 0.008% typical (at 20 Hz to 20 kHz, +4 dBu). IMD for line outputs is 0.02% typical (at +4 dBu, 60 Hz/7 kHz) and headphone outputs are <0.03%.
Inputs: 1 x 1/8" (3.5 mm) TRS stereo mini-jack 1 x XLR 3-pin microphone input 1 x RJ45
Outputs: 2 x 1/4" TRS balanced line outputs 1 x 1/4" TRS unbalanced stereo headphone jack 1 x 1/8" (3.5 mm) unbalanced stereo headphone mini-jack
Phantom Power: 15 V for XLR input
A/D and D/A Conversion: 24-bit Delta-Sigma
Maximum Input Level: Aux Input: +18 dBu (0 dBu optimal) Mic Input: -30 dBu (-42 dBu optimal)
Specifications
Box Dimensions (LxWxH)
10.8 x 7.1 x 4.9"
Crosstalk
Line Outputs: Less than -93 dB at 1 kHz
Dynamic Range
117 dB typical
Enclosure Material
UV-stabilized ABS
Maximum Input Level
Aux Input: +18 dBu (0 dBu optimal) Mic Input: -30 dBu (-42 dBu optimal)
Maximum Output Level
+24 dBu
Noise
-93 dBu at 192 kHz sample rate (A-weighted)
Package Weight
2.1 lb
Phantom Power
15 V for XLR input
Headphone Output Power
@ 8 Ohms: 1.2 W (THD <0.015%), 1.5 W (THD <0.1%) @ 16 Ohms: 1.6 W (THD <0.01%), 1.8 W (THD <0.1%) @ 25 Ohms: 2 W (THD <0.01%), 2.2 W (THD <0.1%) @ 32 Ohms: 1.8 W (THD <0.01%), 2 W (THD <0.1%) @ 50 Ohms: 1.5 W (THD <0.01%), 1.6 W (THD <0.1%) @ 100 Ohms: 1.1 W (THD <0.01%), 1.2 W (THD <0.1%) @ 200 Ohms: 500 mW (THD <0.01%), 650 mW (THD <0.1%) @ 600 Ohms: 220 mW (THD <0.01%), 250 mW (THD <0.1%)
Maximum Cable Distance
Cat6e: 500' / 152.4 m
THD + N
Line Outputs: 0.004% typical (at 1 kHz, +15 dBu), 0.008% typical (at 20 Hz to 20 kHz, +4 dBu)
