Features, Applications | Mackie SWA1801 instruction

SWA1801

The SWA1801 is an 18-inch high output, active sub- woofer system. It features a newly designed high-preci- sion 18-inch transducer combined with application-specific amplifier technology. The system is composed of a single, compact subwoofer cabinet with built-in control and ampli- fier electronics.

The transducer used in the SWA1801 system features a precision 4-inch voice coil that offers extreme power han- dling capabilities. The magnetic assembly used features advancements in coil venting, composite polymide former construction, and structural cooling that provide lower temperature rise and substantially improved power com- pression characteristics.

The amplifier found in the SWA1801 cabinet is an example of application-specific amplifier design that can be exercised when designing active speaker systems. The system uses a proprietary high-efficiency, high-current amplifier designed to provide high current levels at all levels of operation. Having access to high current levels, no matter what the power output, is absolutely critical

in achieving precise, total control of the woofer mass. This control is responsible for lowering audible distor- tion artifacts and providing aggressive attack through the operating band pass of the system. The amplifier, which is mounted on a large, finned aluminum heat sink, is rated at 800 watts rms continuous output.

The SWA1801 features a sophisticated on board con- trol system, allowing for flexible integration with active or passive full range or mid/high speaker systems. The input panel accepts a line-level input signal and has LOOP OUT connectors for signal routing to other devices. It also has HIGH PASS out connectors for connection to active full range speakers or amplifiers powering passive full range speakers. All signal routing is through XLR connectors in L+R stereo or mono. There is a phase selection switch and a recessed level control. The system features thermal protection for the power supply and amplifier and also incorporates rms limiting protection for the amplifier stage that limits the amount of long term power delivered to the transducer.

The cabinet is constructed using 18 mm thick multi- layered birch plywood and finished in black splatter paint. There is one handle on each side for efficient loading and transport as well as a top, female pole mount fixture.