This 4-pack includes one Hear Back PRO Hub and four Hear Back PRO Mixers. The system features a 1/8" (3.5 mm) TRS stereo mini-jack input, an XLR 3-pin microphone input, and an RJ45 connection. It offers two 1/4" TRS balanced line outputs, a 1/4" TRS unbalanced stereo headphone jack, and a 1/8" (3.5 mm) unbalanced stereo headphone mini-jack. The unit supports 15 V for XLR input, 24-bit Delta-Sigma A/D and D/A conversion, with a maximum input level of +18 dBu for aux and -30 dBu for mic. The maximum output level is +24 dBu, dynamic range of 117 dB typical, noise of -93 dBu at 192 kHz sample rate (A-weighted), impedance of 10 kOhms for aux input and 1 kOhm with 150 Hz high-pass filter for mic input, frequency response of 20 Hz to 20 kHz (±0.15 dB) for line outputs, THD + N of 0.004% typical (at 1 kHz, +15 dBu) and 0.008% typical (at 20 Hz to 20 kHz, +4 dBu), and IMD of 0.02% typical (at +4 dBu, 60 Hz/7 kHz) for line outputs and <0.03% for headphone outputs.
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)
