Mackie SP1200 Using the PRE OUT/AMP IN Connections, Zone A Output, Using the Remote Connection

Using the EQ

Each local MIC/LINE INPUT has a 2-band equalizer for adjusting the lows or highs on the microphone signal. When the controls are set to “U” (unity), the EQ has no effect on the signal.

Using the PRE OUT/AMP IN

Connections

The PRE OUT and AMP IN connectors are provided to give you more flexibility in your system design. The SP1200 is shipped with U-shaped jumpers installed between the PRE OUT and AMP IN jacks. This routes the signal from the output of the preamplifier stage to the input of the amplifier stage.

This also provides a point in the signal chain to insert an external signal processor. Simply connect the line-level signal from the PRE OUT jack to the input of the processor, and connect the line-level output from the processor to the AMP IN jack on the SP1200.

Another option that is available is to connect another amplifier into the system. Simply use a Y-cord at the PRE OUT jack to split the signal between the AMP IN jack and the input jack on an external amplifier.

Zone A Output

The amplifier output on the SP1200 can be used with an 8-ohm impedance load, or to drive a 70V or 100V distributed system directly (also called constant-voltage systems).

Direct Speaker Connection

If the SP1200 is not being used in a distributed speaker system, you can reconfigure the amplifier to drive an 8-ohm load. Each amplifier can provide up to 200 watts into an 8-ohm load. See the "Internal Settings" section on page 13 for instructions on how to reconfigure the amplifiers.

Distributed Speaker System

When using the SP1200 in a 70V or 100V system, connect the speaker output directly to the distributed system. The SP1200 can directly drive a distributed system's speaker line without the need for an output transformer. The SP1200 can supply up to 200 watts into a 70V or 100V distributed system. Make sure the taps on the speakers in the system do not exceed a total of 200 watts.

Using the Remote Connection

The optional SP1200 Remote Control (SP-41R) provides Input Selection and Master Volume control for each amplifier or zone. The Remote Control can be mounted in a standard double-gang electrical box and covered with a Decora®-style faceplate.

MASTER

LEVEL

3 0

3 6

9 15

30 55

Connecting One or More Remote Controls

Each Remote Control affects only the zone to which it is connected. Up to ten remote controls may be connected to each zone simultaneously. This allows controls to be conveniently placed.

Each control will interact with the SP1200, and all controls will reflect the current source and level settings. Note that the remote control indicates the gain setting and not the actual signal level in real time. In addition, the SP1200 provides a method for controlling two independent zones using a single Remote Control by assigning them to the same AMP ADDRESS (see next section).

The maximum distance between the remotes and the SP1200 varies, depending on the type of cable selected and the number of remote controls used. Typically, a lower wire gauge and cable capacitance allow longer distances. See the instruc- tions with the remote control for more information.

Using the RS485 Connection

The amplifier is equipped with an RS485 connection. When two SP1200s are linked via the RS485 connection and assigned to the same zone (AMP ADDRESS switches 1-5), the Input Selection and MASTER VOLUME buttons on both amplifiers track each other. One unit must have AMP

SP1200 – 21