Samson MPL 1204 - Manual (Page 13)

13
Connecting The MPL 1204 - General Suggestions
The actual connections you’ll make to and from the MPL 1204 will vary
according to the environment you use it in and the particular equipment you
have. In the “MPL 1204 Applications” sections at the rear of this manual,
you’ll find some suggested setups. Here are a few basic rules concerning
MPL 1204 connections that will apply in most situations:
• In general, it’s best to make all connections with the MPL 1204 and any
connected power amplifiers turned off. If you must make connections with
the power on, make sure that the Main and Control Room Level knobs are
completely counterclockwise and that all four bus faders are completely
down (at their “
∞
” position). Whenever powering down, bring the Main and
Control Room Level knobs completely counterclockwise and set all four bus
faders completely down, turning off the main power amps first. Wait a few
seconds for their power supplies to discharge and then turn off all connected
equipment, turning the MPL 1204 off last.
• Try to use balanced connectors and cabling wherever possible. These kind
of connections do a better job of rejecting extraneous noise and hum and
generally provide a cleaner signal. Although the MPL 1204 will accept
unbalanced connectors throughout, it specifically provides electronically
balanced inputs for all mic and line inputs and for its Main and Control Room
outputs. The wiring diagram below shows how 1/4" TRS (Tip/Ring/Sleeve)
connectors should be wired for use with line-level inputs and Control Room
outputs:
XLR connectors for mic-level inputs and the Main outputs should be wired as
follows:
Unbalanced cables use standard 1/4" phone connectors, wired as follows:
• Make one connection at a time and then monitor the incoming signal. If you
hear a distinct hum or buzz, you may have a grounding problem with that
particular device. See the “Grounding Techniques” section on page 16
in this manual for information on how to avoid grounding problems.
TIP +
GROUND
RING - RING
TIP
SLEEVE
+ SIGNAL
GROUND
+ SIGNAL
GROUND
3 - SIGNAL
1 GROUND
2 + SIGNAL
T
TO MIC
OR POWER
AMPLIFIER