Mackie SP1200 user service Introduction, Key Features

2. Introduction

The SP1200 is a single-channel version of our

popular SP2400 dual-channel microprocessor-based music controller. Having a single 200 watt power amplifier, it's designed for use in a variety of installations requiring high performance, flexible features, and ease of use. Examples of such installations are retail stores, restaurants, bars, and theme venues. The SP1200 provides one output that can be used for single-zone coverage. Four stereo line-level inputs are provided on the rear panel, along with a paging mic input and two local mic/line inputs.

The program input sources can be independently assigned to the zone with the Input Select buttons on the front panel. The boxes under the Input Select buttons are sized to accept Brother P-Touch®labels. Each of the four inputs has an integral AGC circuit to automatically compensate for level differences between the input sources. Input 1 has a buffered line-level output that may be used for music-on-hold or other external applications. Program Priority can be assigned to Input 4 for use with a jukebox or alternative paging configurations. When a signal is detected at Input 4 with priority activated, it overrides any other program source assigned to that channel or zone.

Each of the four input sources can be either

stereo or mono, although output from the SP1200 is a combined mono signal of both left and right inputs. The zone has a 3-band program EQ with sweepable mid for tuning the four program sources.

Each mic input has a 40 dB gain switch for use with either mic or line-level signals as well as a variable gain trim, phantom power switch, and a two- band EQ.

In addition, the zone has a variable VOX control for adjusting the trigger threshold of the paging mic's ducking circuit. The paging mic operates in the zone when voice-activated. However, it can be assigned to operate over the entire system when manually operated with a switch connected to the PAGING MIC CONTROL connector.

The zone is equipped with an input for an optional ambient microphone that can sample the ambient noise level in the room. The microprocessor then adjusts the paging mic gain in the zone to compensate for increased or decreased noise levels. This way the paging mic is always audible above the background noise.

The Master Volume Up/Down buttons adjust the overall level that is routed to the PRE OUT connector (and the AMP IN connector when the jumper is installed). Internal jumpers are provided for configuring the amplifier outputs for 70V, 100V, or 8-ohm operation.

Audio expansion connectors are provided on the rear panel for connecting multiple SP1200s, with shared audio via balanced busing. Each of the four program input signals are internally balanced and can be independently assigned to the balanced bus with internal assignment switches. The LOCAL/ REMOTE switches on the rear panel are provided for selecting either local or bus operation for each input. The paging mic and paging control signal are also carried over the expansion bus.

A wired remote control is available that can be

used to select input sources and adjust volume levels for the zone. The amplifier can be programmed with a unique address, and two amplifiers with the same address can be controlled by a single remote when interconnected by means of the RS485 port. The remote control fits into a double-gang electrical box with a Decora®-style faceplate.

In addition, the RS485 port can interface with third- party control systems, or a PC-compatible computer loaded with the SPLinker software application for computer control of up to 32 zones in a system.

An internal option slot is provided for installing an optional DSP card (SP-DSP1). It provides additional ambient noise sensing for the Program Inputs using the optional ambient microphone. As the noise level in the room increases, the gain on the selected source gradually increases to keep the music audible above the background noise.

An RS232 port (COMM PORT) is provided on the front panel for connecting a Palm™ Handheld or PC-compatible laptop computer for configuring the optional DSP card.

Key Features

•Single Channel Controller/Amplifier

•4 Stereo, Line-Level Program Inputs

•1 Page Mic Input

•1 Local Mic Input

•Digital Cross-Fade between Input Sources

•200 Watts at 70V and 100V

•200 Watts at 8 Ohms

•Transformerless Amplifier Output

•Ambient Noise Sensing for Page Mic

•AGC for Music Sources

•3-Band Sweepable EQ for Music Sources

•2-Band EQ on each Mic Input

•Multiple-Zone or Mono Operation

•Each Zone Addressable (0-31)

•REMOTE connection for optional Remote Control

•RS485 Port for Third-Party Control Systems

Part No. 0001207 Rev. A 1/02

© 2002 All Rights Reserved. Mackie Industrial. Printed in U.S.A.

SP1200 – 3