MADE IN THE USA Features: System Standouts

P R E L I M I N A R Y D ATA
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 Cat5e 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
• Optional Hear Technologies software
for discovering M8RX interfaces on the
network, controlling gain, phantom
power, and LED color
• Standard CAT5e, 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 ¼”-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:
• 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 remotely/locally
selectable on each microphone input
• Burr-Brown 24-bit Delta-Sigma (ΔΣ) A/D
converters
• Burr-Brown 24-bit enhanced multilevel
delta-sigma (ΔΣ) 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
• Remotely selectable LED color on top for
easy color-coding and identification
MADE IN THE U.S.A.
The following are registered trademarks of Hear Technologies: Hear Technologies,
Hear Back, and the "Jack" logo. All names and marks of other companies belong to
those respective companies.
P R E L I M I N A R Y D ATA
Technical Specifications
Switch Back M8RX
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)
TOP
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)
Headphone Power (per channel)
Load Impedance:
8 Ohms:
16 Ohms:
25 Ohms:
32 Ohms:
50 Ohms:
100 Ohms:
200 Ohms:
600 Ohms:
Inter Modulation Distortion:
THD less than 0.01%*
1.2W
1.6W
2.0W
1.8W
1.5W
1.1W
500mW
220mW
Typically less than 0.02%
System Noise Performance
Noise, A-Weighted:
Dynamic Range:
-97 dBu
122 dB
Physical
Size:
BOTTOM
12
13
14
Mounting:
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)
9.5 oz. (0.27 kg)
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**
Unit Weight:
1 - 1/8” Stereo Headphone Output
2 - Master Volume
3 - Input “A” Level
4 - Dante Input “A” Level
5 - Input “B” Level
6 - Dante Input “B” Level
7 - Input “C” Level
8 - Dante Input “C” Level
(Dante Stereo Channels 3 & 4)
9 - Dante Signal & Clip Status LED
10 - Input Signal & Clip Status LED
11 - User-changeable Multi-color LED
(for identifying multiple M8RXs)
*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.
12 - Input “A” Balanced XLR or 1/4” Input
13 - Input “B” Balanced XLR or 1/4” Input
14 - Input “C” Unbalanced 1/8” Stereo
Line Input
15 - Reset Button
16 - Input “B” Phantom Power Indicator
17 - Input “B” Gain & Phantom Power Button
18 - Gain Indicator LEDs for Input “A” or “B”
19 - Input “A” Gain & Phantom Power Button
20 - Input “A” Phantom Power Indicator
21 - “SYS” Dante Status Indicator
22 - “SYNC” Dante Communication Indicator
23 - “ERR” Error Indicator
24 - Dante & PoE Power 100/1000 BaseT
Ethernet Connector
Example Hook-up
Digital Audio Workstation (DAW)
Network Switch with PoE+
Dante Virtual SoundCard
Dante Soundboard
OPTIONAL FOR RECORDING
OPTIONAL FOR LIVE
Headphones
Headphones
Switch Back
M8RX
Headphones
Switch Back
M8RX
Guitar
Vocal Mic
Switch Back
M8RX
Metronome
Vocal Mic
Bass
Vocal Mic
Switch Back
M8RX
Keyboard
Hear Technologies
991 Discovery Drive
Huntsville, AL 35806
®
www.HearTechnologies.com
Phone: 1-256-922-1200
Fax: 1-256-922-1221
Printed in U.S.A. ©2018
Jan 2018
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