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
SLEEVE
TIP
RING
TIP +
GROUND RING -
XLR connectors for
3 | - SIGNAL | TO MIC | |
1 GROUND | |||
OR POWER | |||
2 | + SIGNAL | AMPLIFIER | |
Unbalanced cables use standard 1/4" phone connectors, wired as follows:
| + SIGNAL |
+ SIGNAL |
|
GROUND | GROUND |
•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.
13