Mackie SP1200 Using Inputs, Using the 3-Band EQ, Input 1 and the Direct Output, Input 4 Priority

Using Inputs 1-4

Connect the program sources to Inputs 1-4.

These could include a CD player, tape deck, tuner, satellite feed, TV audio, jukebox, or an audio feed from a live band. All four program inputs use unbalanced RCA connectors and accept stereo line- level signals.

Note: The Input Select buttons are labeled 1 through 4 on the front panel. The spaces below the buttons are sized to accept 1/4" labels from the Brother P-Touch Electronic Labeling System. Professional-looking labels can be made to clearly identify the program source connected to each input (visit www.brother.com).

There are no individual volume controls for

Inputs 1-4. The SP1200 automatically adjusts the volume for each input using an AGC circuit (Automatic Gain Control). This provides the best signal-to-noise ratio and insures that the volume remains the same when you switch from one source to another.

Only one Input source can be selected at a time. When switching from one source to another, the previous source fades out while the new source fades in (digital crossfade), rather than abruptly switching between the two.

Input 1 and the DIRECT OUTPUT

Input 1 provides a direct line-level output that can be used for music-on-hold or other external applications. Connect a continuous music source (i.e., satellite feed, prerecorded background music, multi-disc CD player) to Input 1 and connect the DIRECT OUTPUT jacks to the external destination.

Input 4 Priority

Normally, the four program inputs are non- priority inputs. However, if there is a jukebox or other priority program source in the system, Program Priority can be activated on Input 4 by setting AMP ADDRESS switch #7 UP. When a signal appears at Input 4, it overrides the other three inputs. When the signal stops, the SP1200 switches back to the previously selected input source, fading it in smoothly.

Bus Assign

These internal switches are used if you have two or more SP1200s connected together in a system using the EXPANSION IN/OUT connectors. Each of the four program inputs can be individually assigned to the EXPANSION balanced bus. There are four switches associated with each Program Input source (see the Bus Assign Switch chart on page 13).

CAUTION: When using multiple SP1200s that use the expansion bus, these switch

settings must be unique to each unit or you can damage your SP1200(s). Never assign more than one program source to the same channel on the Expansion Bus.

EXPANSION IN/OUT

These two 25-pin D-Sub connectors are used to connect two or more SP1200s together so they can share program sources. This is a true balanced bus and transmits the left and right signal from each of the four inputs over balanced lines. Refer to the “Connections” section on page 11 for information on wiring these connectors.

These connections allow a common program source to be available to all the SP1200s in a system. For example, prerecorded music that is used for music-on-hold can also serve as background music for an entire office building by setting the internal bus assign switches for Input 1 to the up position on the first SP1200. The music is then available to Input 1 on all the SP1200s connected via the EXPANSION IN/OUT connectors when their LOCAL/REMOTE switches are set to the REMOTE position (down).

Note: Switching the LOCAL/REMOTE switch to REMOTE doesn't disconnect the local input. If a different program source is connected locally to Input 1 on one of the SP1200s in the above example, both the common program source (the remote prerecorded music) and the local program source will be combined on Input 1 and can be played simultaneously. Typically, a local program source would not be connected to an Input which has REMOTE selected as the source.

Local or Remote

These switches are used to select the input

source for each of the four Program Inputs. Leave the switches up to select the local input source connected to the PROGRAM INPUT connector. Move the switches down to select the remote signal coming from the EXPANSION IN connector. Each Program Input has two switches, one for the left input and one for the right input.

SP1200 – 18

Using the 3-Band EQ

This equalizer is applied to the selected program source from Inputs 1-4, whether it is a local source or remote source (via the EXPANSION IN/OUT bus). This equalizer does not affect the paging mic or the local MIC/LINE INPUTS, which each have their

own 2-band EQ controls.