Hear Back Switch Back M8RX Preamp and Multi-channel Headphone

With an intuitive design and robust capabilities, the SwitchBack 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 are 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.

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
• Remotely/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
• Remotely 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)

Features:

• 4×4 Dante (4 Dante Inputs and 4 Dante Outputs)
• Master volume control for headphones
• Easy access to all volume controls on the face of the unit
• Dual-color signal and peak indicators on each input channel
• Concentric volume control on each channel reduces space and simplifies the user interface by placing local inputs on the tips and Dante inputs on the rings of each knob
• True 48-volt phantom power remotely/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 the 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 Zerlatency headphone monitoring of the local analog inputs
• Gain, phantom power, and Dante status indicators tucked away on the rear of the unit
• Streamlined cable connections on the rear of the unit

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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

Physical:

• 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:

• Power Requirements: PoE+ 36-52 VDC, 15 Watts max**