Connecting The PL 1602 - General Suggestions
The actual connections you’ll make to and from the PL 1602 will vary according to the environment you use it in and the particular equipment you have. In the “PL 1602 Applications” sections at the rear of this manual, you’ll find some suggested setups. Here are a few basic rules concerning PL 1602 connections that will apply in most situations:
•In general, it’s best to make all connections with the PL 1602 and any con- nected power amplifiers turned off. If you must make connections with the
power on, make sure that the Left/Right faders are completely down (at their “∞ ” position). Whenever powering down, bring the Left/Right faders com- pletely down and turn 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 PL 1602 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 PL 1602 will accept unbal- anced connectors throughout, it specifically provides electronically balanced inputs for all line inputs and for its Main outputs. The wiring diagram below shows how 1/4" TRS (Tip/Ring/Sleeve) connectors should be wired for use with these inputs and outputs:
SLEEVE
TIP
RING
TIP +
GROUND RING -
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 section in this manual entitled “Grounding Techniques” (pages 14 - 15) for information on how to avoid grounding problems.
•When using channels 1 and 3, be sure not to connect both a microphone and line level input simultaneously— use one or the other. The diagram below shows how your mic connectors should be wired:
3 - SIGNAL
1 GROUND 
TO MIXER 2 + SIGNAL
9
