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DO GUIDE
Ground
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
DO Check the Box
QTY PRODUCT COLOR PART NUM.
1 Power Pack, 12 Vdc 0.5 A, 100-240 Vac 2045884
1 Bracket, Mounting, Plastic Black 4522294
1 Cable, USB 2.0, A - Mini B, 15’ (5 m) 2035913
6 Connector, 3-Pin 2003575
1 Connector, 5-Pin 2003577
2 Screw, 06-32 x 3/8", Pan Head, Phillips Black 2007225
DO Adjust the Settings
Refer to the following illustration, and adjust the controls to achieve the desired results.
Microphone
bus assignments (x6)
L = left; R = right; + = L & R
Output master
low cut lter
Output master
level indicator
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.
USB:
To USB audio device
12V 0.5A:
From AC
power pack
NOTE: The AUDIO OUTPUT and USB ports can be connected simultaneously.
AUDIO OUTPUT:
To analog audio
input
INPUT:
From microphones (x6)
Bi-color input
channel level
indicators (x6)
Input channel
level controls (x6)
Output master
level control
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.
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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 manu facture, the product h as bee n tested and foun d to comply with sp ecications for CE ma rking.
Federal Communications Commission (FCC) Compliance Statement
This device com plies w ith par t 15 of the FCC Rules. Operation is subject to t he following two c onditions:
(1) This devic e may not cause harmful interference, and (2) this device must a ccept a ny inter fere nce received, including inte rference
that may cause undesired operation.
CAUTION: Changes or modication s not expressl y approved by the ma nufac turer r esponsible for comp lianc e could void the
user’s authority to ope rate the e quipm ent.
NOTE: This equipment has been te sted and found to c omply with the limits for a Class A digital device, pursuant to part 15 of the
FCC Rules. Thes e limits are des igned to provide reaso nable p rotection against harmful inter ference in a residential ins talla tion.
This equipment gene rates, uses an d can radiate radio frequency energ y and, if not installed and used in accordance with the
instructions, may cause har mful in terferenc e to radio c ommun ications. However, there is no guarantee th at inter ference will not
occur in a particular insta llatio n.
DO GUIDE
If this equipment does c ause ha rmful inter feren ce to radio or television r eception, which can b e determined by turning the
equipment of f and on, the user i s encourage d to try to correct the interfe rence by one or more of the following m easures:
• Reorient or relocate the receiving antenna.
• Increase the separ ation b etween the equipment and receiver.
• Connect the e quipm ent into a n outle t on a circuit dif ferent from th at to whic h the rec eiver is conne cted.
• Consult the dealer o r an expe rienced radio/T V technician for help.
Industry Canada (IC) Compliance Statement
CAN ICES-3(A)/NMB-3(A)
The speci c patents that c over Crestron pro ducts are listed a t patents.crestron.com. The produ ct warranty ca n be found at www.crestron.com/warranty.
Certa in Crestron pro ducts contain op en source soft ware. For speci c information, ple ase visit www.crestron.com/opensource.
Crestr on and the Crest ron logo are eit her trademark s or registered t rademarks of C restron Elec tronics, Inc . in the United St ates and/or ot her countrie s. Other trade marks, regist ered trademar ks,
and trade na mes may be used in this d ocument to refer t o either the enti ties claiming the ma rks and names or the ir products. C restron discl aims any propriet ary interes t in the marks and nam es
of others . Crestron is not r esponsible for err ors in typogra phy or photography.
This docum ent was written by t he Technical Publicat ions departmen t at Crestron.
©2016 Crestron Electronics, Inc.
DOC. 7742 B (20 430 00 ) 12.16
Specic ations subject to c hange without not ice.
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