PLACEMENT

The SRS1500 subwoofer is designed to sit on the floor or on sturdy stands.

A socket is provided on the top of the SRS1500 for mounting the Mackie SRM450 active speaker. Use the optional Mackie speaker mounting pole to mount the SRM450 on the SRS1500 (see Hookup Diagram on page 5).

As with any powered components, protect them from moisture. If you are setting them up outdoors, make sure they are under cover if you expect rain.

AC POWER

Be sure the SRS1500 is plugged into an outlet that is able to supply the correct voltage specified for your model. If the voltage should drop below 97% of the specified line voltage, the built-in amplifiers will no longer be able to supply rated power. (They will continue to operate down to 80% of the rated line voltage, but won’t reach full power, resulting in lower headroom.)

Be sure the electrical service can supply enough amperage for all the components connected to it.

We recommend that a stiff (robust) supply of AC power be used because the amplifiers place high current demands on the AC line. The more power that is available on the line, the louder the speakers will play and the more peak output power will be available for cleaner, punchier bass. A suspected problem of “poor bass perfor- mance” is often caused by a weak AC supply to the amplifiers.

Never remove the ground pin on the power cord of the SRS1500 or any other component. This is very dangerous.

THERMAL

CONSIDERATIONS

The SRS1500 has a powerful 600 watt amplifier built-in. As amplifiers produce heat, it is important to dissipate the heat as quickly as possible. This results in increased reliability and longevity for the amplifier.

The amplifier module is mounted on a large heatsink, which is cooled by convection where cool air is drawn through it’s fins, carrying the heat away. In order for this convection cooling to work efficiently, it is important to provide adequate airspace behind the loudspeaker. When you position the SRS1500, we recommend leaving at least six inches of air space behind it.

In the unlikely event of the amplifier

overheating, a built-in thermal switch will activate, muting the signal and causing the THERMAL indicator on the rear panel to light. When the amplifier has cooled down to a safe operating temperature, the thermal switch resets itself, the THERMAL LED turns off, and the SRS1500 resumes normal operation.

If the thermal switch activates frequently, try turning down the level control a notch or two on the mixing console (or other signal source) or on the subwoofer itself to avoid overheating the amplifiers.

If the temperature in the room is too high, it could cause the amplifier to over- heat. In this case, you should try aiming a fan at the rear panel to move more air across the heatsink panel.

SERVICE INFORMATION

Warranty Service

If you think your subwoofer has a prob- lem, please do everything you can to confirm it before calling for service, including reading through the following Troubleshooting section. Doing so might save you from being deprived of your Mackie loudspeaker.

6