Mackie SP2400 instruction manual Introduction, Key Features

2. INTRODUCTION

The SP2400 is a microprocessor-based dual- channel music controller with two built-in power amplifiers designed for use in a variety of installations requiring high performance, flexible features, and ease of use, such as retail stores, restaurants, bars, and theme venues. It provides two outputs that can be used for either stereo operation or two-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 each zone with the Input Select switches on the front panel. The boxes under the Input Select buttons on the front panel 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, it overrides any other program source assigned to that channel or zone.

Each of the four input sources can be operated in either stereo or mono mode. Each zone has a 3- band 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, each zone has a variable VOX control for adjusting the trigger threshold of the paging mic's ducking circuit. The paging mic operates in both zones when voice-activated, but can be assigned to operate in either Zone A or Zone B, or over the entire system when manually operated with a switch connected to the PAGING MIC CONTROL connector.

Each 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 each zone to compensate for increased or decreased noise levels so that 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.

Part No. 0000117 Rev. A 08/01

© 2001 All Rights Reserved. Mackie Industrial. Printed in U.S.A.

Audio expansion connectors are provided on the rear panel for connecting multiple SP2400s, 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 each zone. Each 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 on each of the two channels for installing an optional DSP card (SP- DSP). 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

•Two Channel Controller/Amplifier

•4 Stereo, Line-Level Program Inputs

•1 Page Mic Input

•1 Local Mic Input per Channel

•Digital Cross-Fade between Input Sources

•200 Watts/Channel at 70V and 100V

•200 Watts/Channel at 8 Ohms

•Transformerless Amplifier Outputs

•Ambient Noise Sensing for Page Mic

•AGC for Music Sources

•3-Band Sweepable EQ for Music Sources

•2-Band EQ on each Mic Input

•Dual-Zone or Stereo Operation

•Each Zone Addressable (0-31)

•REMOTE connection for optional Remote Control

•RS485 Port for Third-Party Control Systems

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