Hear Tech Hear Back OCTO Four Pack



12-Month Special Financing**


  • Improved ease of use
  • Enhanced sound quality
  • Inspired by Hear Back PRO system
  • More compact size
  • Capacitive touch link buttons
  • Easier labeling with flat-top surface
  • 8 mono channels with up to 4 stereo pairs
  • 100% backwards compatible with the original Hear Back system
  • Compatible with the Hear Back PRO system via optional PRO Hub ADAT Card
  • All connectors conveniently located on one end for easy access
  • Includes 1/8″ and 1/4″ headphone jacks

Hear Back OCTO System

The next evolution of the Hear Back 8-channel personal monitoring system has arrived – introducing the Hear Back OCTO.

With improved audio quality, system performance, and overall ease of use, it revolutionizes monitor mixing on stage or in the studio. Imagine getting your mix exactly the way you want it. With the Hear Back OCTO System, you save time and get the sound just right, the first time. This affordable system is perfect for headphones, wired and wireless in-ear monitors, and/or conventional floor monitors.

System Standouts

  • Virtually unlimited system size
  • Affordable solution
  • Excellent audio fidelity
  • Very long digital cables possible without loss of audio quality
  • Audio inputs ADAT, analog, and the HearBus are switch selectable from the front panel
  • Local control of up to 10 channels of audio (eight inputs plus a stereo AUX input). Master Volume controls the level of headphones, line outs, and AUX input.
  • Headphone amplifier fault indicator: In case of overheating or a short, the red LED illuminates to alert the user of a problem
  • Bus Status Indicator: Confirms proper connection to the Hub
  • Link Indicators: Whenever two pairs of mono inputs are linked for stereo operation, the link LED is illuminated
  • Standard CAT5e power and signal connection – a cost effective, simple, unobtrusive way to connect eight channels of audio. The cable is held in place with a built-in cable strain relief.
  • Balanced line-outs, mono/stereo
  • Stereo AUX In
  • Mixer has a built-in mic stand mount for attaching to a standard mic stand or clipping onto a stand extension bar or clip
  • High power – low distortion headphone amplifiers


The Hear Back OCTO system is available in a Four Pack as well as offering Mixers and Hubs separately.

  • Hear Back OCTO Four Pack
    • (4) OCTO Mixers, (1) OCTO Hub, (4) 50′ Cat5e Cables, (1) Tote Back, and (1) Analog DA-88 style cable


System Features

Hear Back OCTO Mixer Features

The Hear Back Mixer is equipped to mount to any standard mic or desk stand using the built-in 5/8″ threaded socket located on the back of the mixer.

  • Local control up to 10 channels of audio
  • Master volume
  • Built-in standard mic stand mount
  • 24-bit D/A converters
  • Bus status indicator
  • Headphone amplifier fault indicator
  • Mono/stereo link indicators
  • Balanced line outs, mono/stereo
  • Stereo AUX in:
    • Expand numbers of mixers
    • Drum module/metronome input

Hear Back OCTO Hub Features

A single Hub supplies signal and power to a maximum of eight Mixers. To expand your system, the Hubs can be daisy-chained using the HearBus In/Out for virtually unlimited system size. The Hub accepts analog input signals from an audio mixer such as auxiliaries, matrix outs, sub outs, monitor outs, and/or direct outputs. The ADAT input can come from digital audio workstations, digital recorders, or digital mixers.

  • Three switch selectable input sources:
    • ADAT® Optical
    • Analog
    • HearBus
  • 24-bit A/D converters
  • 44.1KHz and 48KHz sample rates
  • Multi-color, four-level metering
  • Daisy-chain for expanded systems
  • Internal universal input power supply
  • 1 RU chassis
Mixer Aux Input
Line Input Configuration / Impedance: Stereo, unbalanced, 10 Kohms typical
Line Input Level: +4 dBu optimal, +22 dBu max
Mixer Headphone Power (Per Channel)
Load Impedance: THD less than 0.01%* THD less than 0.1%
8 Ohms: 342 mW 412 mW
16 Ohms: 731 mW 783 mW
25 Ohms: 1.07 W 1.25 W
32 Ohms: 1.37 W 1.6 W
50 Ohms: 1.26 W 1.88 W
100 Ohms: 971 mW 1.03 W
200 Ohms: 512 mW 537 mW
600 Ohms: 185 mW 190 mW
IMD: Typically Less than 0.02%
Mixer Line Output
Freq Response: 20 Hz to 20 KHz, +/-0.16 dB
THD+N: 0.004% typical at 1 kHz, +18 dBu
0.008% typical, 20 Hz – 20 kHz, +4 dBu
IMD: 0.02% typical at +4 dBu, 60 Hz / 7 kHz
Crosstalk: Less than -85 dB @ 1 kHz
Latency: Less than 1.5 mSec
System Noise Performance
Noise, A-Weighted: -94 dBu @ analog, -97 dBu optical
Dynamic Range: 122 dB typical
System I/O
Hub Line In, Analog: 8 Balanced inputs on DB-25 female (DA-88 pinout)
Hub Max Input Level, Analog: +18 dBu
Hub Light Pipe In: Industry standard fiber optic connector, shuttered
Hub HearBus In, Out: 2x 8-pin RJ45 jack
Mixer Headphone Out: 1x TRS 1/8″ and 1x 1/4″ unbalanced stereo
Mixer Line Out: 2x TRS 1/4″ balanced (left/mono or stereo)
Mixer Max Output Level, Analog: +28 dBu (mixed output)
Mixer Aux Input: TRS 1/8″ unbalanced stereo
Physical, Mixer
Size: 5.1″ H x 9.3” W x 2.519″ D (12.95 cm H x 23.62 cm W x 6.40 cm D)
Unit Weight: 15.8 oz. (0.45 kg)
Mounting: Standard mic stand (5/8″ 27 threads per inch) or desk mounted
Physical, Hub
Size: 1.75″ H x 19.0″ W x 5.0″ D (4.45 cm H x 48.26 cm W x 12.7 cm D)
Unit Weight: 3.9375 lb. (1.79 kg)
Mounting: Standard rack mount, 1 RU
Hub Power Requirements: ~100-240VAC 125W 50/60Hz

Note: 0 dBu = 0.775 Vrms. Specifications and features subject to change without notice.

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