Protech MX408 User Manual
®
PROTECH
1/05
INSTALLATION & OPERATION
MANUAL
MX408 AUDIO MIC/LINE MIXER, Rev. A
WWW.PROTECHAUDIO.COM
All Quicktrack products use a consistent ground scheme. The MXT-1 power supply provides the
necessary ground conductor. Power supplies without the 3rd conductor ground should not be used
with Quicktrack products.
CAUTION: Do not plug power supply into AC receptacle until the secondary conductors have been
attached to the Quicktrack module. Doing so may cause the power supply conductors to short and
damage the supply.
Installion steps for the Quicktrack modules are as follows;
1- Remove the cover screw (All modules except MX410) and cover.
2- Press down on the lower edge of the Quicktrack mounting extrusion until the lower edge of the
printed circuit assembly comes free.
3- Slip the printed circuit assembly out of the upper edge of the mounting extrusion.
4- Mount the Quicktrack mounting extrusion in an appropriate location, away from moisture, heat
sources, and AC fields.
5- Connect all audio connections to the barrier connector using double conductor shielded cables
designed for low level audio signals. Do not use multiple solid conductor cables.
6- Connect the 3 power supply conductors to the power supply connection points on the barrier
connector.
7- Plug the power supply into an AC receptacled.
8- Check for proper illumination of the LED power indicator.
9- Adjust all audio levels as necessary.
10- Mount the cover onto the Quicktrack module being careful not to over-tighten the mounting
screw.
MODEL MX408
1
2
3
4
All initial adjustments on the MX408 are made at the factory. If after installing the unit higher or lower output
levels are desired, adjust inputs using trimpots as indicated.
Protech Audio Corporation, PO Box 597, 192 Cedar River Road, Indian Lake, New York, 12842, Voice 518-648-6410 Fax 518-648-6395
M
M
M
L
=Phantom Power
Shunt
L
=6dB Pad
The Model MX408 has three microphone inputs, and one line
input, mixed to a common line output. Each microphone input
has 15 volt phantom power circuitry, which is activated by
a push-on shunt (jumper). The line input has a 6dB pad,
which is also activated by a push-on shunt. All inputs have
adjustable gain.
All inputs, and the output, are electronically balanced. The
output may be used in either a balanced or unbalanced
configuration. Requires low voltage AC power (See MXT-1).
PROTECH
WWW.PROTECHAUDIO.COM
®
INSTALLATION & OPERATION
MANUAL
MX408 AUDIO MIC/LINE MIXER, Rev. A
ALL
QUICKTRACK
PRODUCTS
USE
CONSISTENT
GROUNDING
SCHEMES
AND
PACKAGING
18
VAC18VAC
G
OUTPUT
N
- +
D
3.375"
6dB pad
FUSE
POWER ON INDICATOR
LINE
- +
MIC #3
S
- +
H
CONNECTIONS
4.5"
SOCKETED IC'S
POWER INPUTS AND OUTPUT
GROUND LIFT
MIC #2
- +
S
H
MIC #1
- +
MOUNTING
HOLES
Phantom
Power
Shunts
1.0"
POWER FROM
MXT-1
TRANSFORMER
RED - AC
BLACK - AC
GREEN - (GND)
UNBALANCED LINE INPUT
CONNECTION
HI
LO
SH
BALANCED LINE INPUT
CONNECTION
HI
LO
SH
UNBALANCED LINE OUTPUT
CONNECTION
HI
LO
SH
BALANCED LINE OUTPUT
CONNECTION
MICROPHONE INPUT
CONNECTION
SH
HI
LO
HI
LO
SH
Protech Audio Corp., 192 Cedar River Road, Indian lake, New York, 12842 Voice 518-648-6410 Fax 518-648-6395
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