Switch Back M8RX

A Preamp and Multi-channel Headphone Monitoring Interface

With intuitive design and robust capabilities, the Switch Back M8RX™ is actually two products in one. This gives the musician a choice to play live, record, or monitor their mix all in one single tool.

The M8RX is a personal interface to be used for live sound or recording, and also a multi-channel headphone monitoring system. While compact in size, the M8RX gives individuals options to use it in multiple ways, such as a mini recording studio setup or a simple communication system.

The research and design of the M8RX is what sets it apart. Our engineers created the sleek look and feel making it perfect for hanging from a belt, mounting on a mic stand, or sitting on a table. The M8RX features a total of eight channels of audio mixing – two studio-quality microphone preamps, two channel line-inputs, and four Dante network audio inputs/outputs. The M8RX's two mic preamps have a distortion spec below 0.001% along with zero-latency analog mixing and monitoring of the four analog inputs. With Ethernet capability becoming standard in most pro audio gear today, the M8RX includes a total of four channels of Dante network audio inputs/outputs.

Along with the same high quality headphone amplifier as in the Hear Back PRO and OCTO systems, the M8RX has 5 watts of headphone power and can be connected to a computer via the Ethernet port. The unit uses PoE power over the same Cat6 cable as the Ethernet. The M8RX is manufactured in the U.S. to ensure our customers get the quality they have come to expect from Hear Technologies.

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Switch Back M8RX

System Standouts

  • Local control of up to 8 channels of audio (4 local analog inputs and 4 Dante digital inputs)
  • All 4 local analog input channels are made available on the Dante network as sources
  • Two ultra-low-noise studio-quality discrete microphone preamplifiers
  • Locally adjustable microphone gain selectable in 6 dB increments between 30 and 60 dB of gain
  • Ultra-low distortion of 0.001% THD+N (even with 60 dB of gain on the microphone preamp!)
  • Zero latency headphone monitoring of the local analog inputs
  • Locally selectable LED color on top for easy color-coding and identification
  • Standard CAT6 cabling delivers power and Dante digital audio to each M8RX interface
  • Small enough to be belt clipped or mount on a stand or clip with 1/4"-20 thread standard camera-tripod mount
  • Use stand-alone as a small microphone preamp, analog mixer, and headphone amplifier without a Dante network connection (great as a "more me" system)
  • 4x4 Dante (4 Dante Inputs and 4 Dante Outputs)
  • Master volume control for headphones
  • Easy access to all volume controls on face of unit
  • Dual-color signal and peak indicators on each input channel
  • Concentric volume control on each channel reduces space and simplifies user interface by placing local inputs on the tips and Dante inputs on the rings of each knob
  • True 48-volt phantom power locally selectable on each microphone input
  • Burr-Brown 24-bit Delta-Sigma A/D converters
  • Burr-Brown 24-bit enhanced multilevel delta-sigma D/A conversion
  • 1/8” unbalanced stereo input for auxiliary sources such as metronome, iPod, external microphone preamp, etc.
  • Balanced 1/4" inputs automatically have 18dB of padding over XLR inputs
  • Combo XLR & 1/4" TRS balanced inputs on channels 1 & 2 for connecting microphones or instruments
  • 100/1000 BaseT Ethernet
  • Powered by Power over Ethernet (PoE+) guarantees ground isolation between M8RX interfaces Zero latency headphone monitoring of the local analog inputs
  • Gain, phantom power, and Dante status indictors tucked away on rear of unit
  • Streamlined cable connections on rear of unit
Inputs A & B (available on Dante network as channels 1&2)
Mic Input Configuration: Mono, Balanced XLR
Mic Input Frequency Response: 10Hz - 120kHz +/-0.5dB (analog input to headphone output)
Mic Input THD+N: 0.001% @ 150mV input
Mic Input IMD: 0.004% @ 150mV input
Mic Input X-TALK: -86dBu @ 150mV input
Mic Input Sensitivity: -64dBu (gain at max), -30dBu (gain at min)
Line Input Frequency Response: 10 Hz - 120kHz +/-0.5dB (analog input to headphone output)
Line Input THD+N: 0.001% @ 1V input
Line Input IMD: 0.004% @ 1V input
Line Input X-TALK: -91dBu @ 1V input
Line Input Sensitivity: 13dBu (gain at max), +20dBu (gain at min)
Input C (available on Dante network as channels 3&4)
Input Configuration: Stereo, Unbalanced 1/8" TRS
Input Frequency Response: 10Hz - 120kHz +/-0.5dB (analog input to headphone output)
Input THD+N: 0.005% @ 200mV input
Input IMD: 0.015% @ 200mV input
Input X-TALK: -70dBu @ 200mV input
Input Sensitivity: -10dBu (fixed gain)
IMD: Typically Less than 0.02%
Headphone Power (per channel)
Load Impedance: THD less than 0.01%*
8 Ohms: 1.2W
16 Ohms: 1.6W
25 Ohms: 2.0W
32 Ohms: 1.8W
50 Ohms: 1.5W
100 Ohms: 1.1W
200 Ohms: 500mW
600 Ohms: 220mW
Inter Modulation Distortion: Typically less than 0.02%
System Noise Performance
Noise, A-Weighted: -97 dBu
Dynamic Range: 122 dB
Size: 5.5" H x 4.45" W x 1.625" D (13.97 cm H x 11.30 cm W x 4.13 cm D)
Unit Weight: 9.5 oz. (0.27 kg)
Mounting: Standard camera tripod thread (1/4" 20 threads per inch), belt clip, or desk mounted
Power Requirements: PoE+ 36-52 VDC, 15 Watts max**

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

**Provided by Hear Technologies PRONET or equivalent network switch with PoE+ capability




If you need help from our highly skilled Tech Support, the easiest and quickest way to get your solution is by phone. Hear Technologies is committed to providing you the industry's best customer service.

Max Sulkowski
Phone: 1-256-922-1200 ext. 135
Fax: 1-256-922-1221

For more information please see our Support page.

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