Crestron MMX-6-USB Dimensional drawing
DO GUIDE
DO Adjust the Settings
Refer to the following illustration, and adjust the controls to achieve the desired results.
Set Phantom Power
Each input has switchable phantom power (+48v) for use with condenser microphones. The
MMX-6-USB ships with the phantom power switches (located on the rear panel) in the OFF
position. When setting up the system, rst determine if the microphone(s) to be connected
requires phantom power. If phantom power is required, ensure that the microphone input's
individual gain control remains closed (turned counterclockwise), and slide the input's phantom
power switch to the ON position. The corresponding LED illuminates.
Set the Microphone Input Levels
Each microphone input features an adjustable input channel level control on the front panel.
The MMX-6-USB ships with the level controls at the lowest setting (counterclockwise, closed
position). Use a at-head screwdriver to adjust each input channel's level.
NOTE: When adjusting the input channel level controls, use slow and easy pressure. Do not
force the control or rotate past the indicated stop.
Each input has an LED to monitor the signal level. When adjusting the level, monitor the input
channel's LED.
• When a signal is present, the LED illuminates green.
• When the LED changes to red during the course of normal speech, it indicates that some
clipping is occurring.
• A steady red LED indicates that the input is steadily clipping. When constant clipping
occurs, reduce the microphone level. Brief amounts of signal clipping may be acceptable
while steady clipping is not.
MMX-6-USB
6-Channel USB Microphone Mixer
DO Install the Device
The Crestron®MMX-6-USB can be mounted onto a DIN rail, mounted to any at surface, or
placed on a tabletop. If necessary, use screws that are applicable for the mounting method. See
and for installation options.
NOTE: The MMX-6-USB can also be rack mounted. For rack mount installation, refer to the
RMK-IFE-1U Installation Guide (Doc. 7627) at www.crestron.com/manuals.
Flat Surface Mounting DIN Rail Mounting
NOTE: Do not use the supplied screws to mount the bracket to the bottom of the MMX-6-USB
if the device will be mounted on a DIN rail. Removing the MMX-6-USB from the DIN rail is not
possible.
DO Connect the Device
Make the necessary connections as called out in the illustration that follows. When making
connections to the device, use Crestron®power supplies for Crestron equipment. Apply power
after all connections have been made.
NOTE: The AUDIO OUTPUT and USB ports can be connected simultaneously.
DO Check the Box
QTY PRODUCT COLOR PART NUM.
1 Power Pack, 12 Vdc 0.5 A, 100-240 Vac 2045884
1Bracket, Mounting, Plastic Black 4522294
1 Cable, USB 2.0, A - Mini B, 15’ (5 m) 2035913
6Connector, 3-Pin 2003575
1Connector, 5-Pin 2003577
2 Screw, 06-32 x 3/8", Pan Head, Phillips Black 2007225
USB:
To USB audio device
Ground
INPUT:
From microphones (x6)
AUDIO OUTPUT:
To analog audio
input
12V 0.5A:
From AC
power pack
Microphone
bus assignments (x6)
L = left; R = right; + = L & R
Output master
low cut lter
Output master
level control
Bi-color input
channel level
indicators (x6)
Input channel
level controls (x6)
Output master
level indicator
DO GUIDE DOC. 7742B (2043000) 12.16
Specications subject to change without notice.
Set the Output Master Level
The MMX-6-USB features an adjustable output master level control on the front panel. The
MMX-6-USB ships with the level set at the lowest setting (counterclockwise, closed position).
Use a at-head screwdriver to adjust the output master level.
NOTE: When adjusting the output master level control, use slow and easy pressure. Do not
force the control or rotate past the indicated stop.
The output master level control has a single LED to monitor the signal level. When adjusting the
level, monitor the output master's LED.
• When a signal is present, the LED illuminates green.
• When a signal is clipping to the analog line level outputs and the input of the USB
converter, the LED illuminates red. Do not allow the output master level to clip when using
the USB output, as the analog-to-digital converter clips at the same point.
Set the Low-Cut Filter
The MMX-6-USB has a switchable, low-cut lter that minimizes any unwanted low-frequency
handling or mechanical noise from entering the system. The switch is located on the front panel.
When the switch is engaged, (the switch is in the “ ” position), a 100 Hz low-cut lter is inserted
into the USB and analog output signal paths.
Set the Signal Busing
Each microphone signal can be bused to the left and right channels of the output signal, the
right channel of the output signal, or the left channel of the output signal. An input's busing is
selected with a switch located on the front panel.
• L assigns the signal to the left bus.
• R assigns the signal to the right bus.
• + assigns the signal to the left and right buses equally.
In a Left-Right sound system, use the L or R settings to source identify audio to the side of the
table where the presenter is located. This conguration presents the audio at the far end with
left or right panning to match the presenter's location. The near end and the far end systems
must be congured for left or right operation. If the system is a single, mono audio playback
channel, or Left-Right panning is not desired, use the + bus assignment.
DO Learn More
Visit the website for additional information and the latest rmware updates. To learn
more about this product, use a QR reader application on your mobile device to scan
the QR image.
Crestron Electronics
15 Volvo Drive, Rockleigh, NJ 07647
888.CRESTRON | www.crestron.com
As of the date of manufacture, the product has been tested and found to comply with specications for CE marking.
Federal Communications Commission (FCC) Compliance Statement
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference
that may cause undesired operation.
CAUTION:Changes or modications not expressly approved by the manufacturer responsible for compliance could void the
user’s authority to operate the equipment.
NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the
FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not
occur in a particular installation.
If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
Industry Canada (IC) Compliance Statement
CAN ICES-3(A)/NMB-3(A)
The specic patents that cover Crestron products are listed at patents.crestron.com. The product warranty can be found at www.crestron.com/warranty.
Certain Crestron products contain open source software. For specic information, please visit www.crestron.com/opensource.
Crestron and the Crestron logo are either trademarks or registered trademarks of Crestron Electronics, Inc. in the United States and/or other countries. Other trademarks, registered trademarks,
and trade names may be used in this document to refer to either the entities claiming the marks and names or their products. Crestron disclaims any proprietary interest in the marks and names
of others. Crestron is not responsible for errors in typography or photography.
This document was written by the Technical Publications department at Crestron.
©2016 Crestron Electronics, Inc.
