Mackie SA1521 Spec Sheet - Page 1

SA1521  The SA1521 is an active 2-way sound reinforcement speaker system designed for extreme accuracy, high output, and smooth dispersion across the entire audio frequency range. It integrates 500 watts of amplifier power, active control electronics, and precision components into a speaker system with 100 dB sensitivity (1 watt @ 1 meter). The resulting high resolution and clarity in the critical lowmid and mid-range frequencies are unparalleled for a 15" loaded, 2-way speaker system.  Several state of the art advancements in transducer technology have been incorporated in the design of the SA1521. The compression driver uses a new 1.75-inch titanium diaphragm featuring a 3-slot, optimized geometry phase plug. When coupled to the low-distortion, highoutput horn, the SA1521 provides uniform power response and correct phase alignment characteristics at the crossover frequency. With the resulting 75° x 65° dispersion pattern, the SA1521 provides very open, natural sound reproduction at extreme output levels.  A 15-inch high-efficiency woofer produces tight, punchy bass. The woofer's magnetic structure delivers an exceptional amount of magnetic force and is responsible for the system's high sensitivity and high efficiency by providing tight control over the cone's movement. This tight control over the woofer's moving mass results in unusually smooth low-frequency response from 50Hz up to the mid-frequency crossover point at 1300Hz.  The amplifier for the compression driver incorporates a Class AB topology, renowned for its clarity, warmth, and high-voltage output to generate extreme SPL levels. A Class G design is used for the low-frequency amplifier, which features two power supplies for improved efficiency and more output power per pound.  A signal panel and a power panel are located on the amplifier assembly at the back of the cabinet, separated by a large aluminum heatsink. The signal input panel contains XLR connectors for line-level input and loop-through connections, a level control, and four status LEDs for Power ON, Signal Present, Limit, and Thermal functions. The power switch and IEC AC connector are located on the power panel.  The internal processor provides complete system man- agement of all electronic and acoustic functions. These include an electronic active crossover, electronic phase alignment, electronic time correction, electronic equalization, and complete amplifier and component protection.  To ensure long-term reliability, the amplifiers are mounted on a massive extruded heatsink, which is convection cooled and dramatically extends the life expectancy of the heat-producing components. (continued on page 2) SPEAKER SA1521 Active 2-Way Sound Reinforcement Speaker System SA1521 Features Active, High Output/Wide Dispersion 133 dB Peak SPL Bi-amplification with 400 watts rms low-frequency and 100 watts rms high-frequency power Wide dispersion, ultra-low distortion highfrequency horn Complete electronic and component protection circuitry 15-inch high efficiency, light mass woofer State-of-the-art precision 1.75-inch titanium compression driver with 3-slot, low distortion, optimized geometry phase plug Electronic equalization, time correction and phase alignment Low Frequency Dynamic Bass Protection, RMS Limiting, Power Supply and Amplifier Thermal Protection Professional trapezoidal enclosure design Correctly weight-balanced with two comfortable side handles for easy carrying and set up One top and one bottom handle for easy repositioning of speaker and built-in pole mount cup on bottom Applications Live Applications Playback Applications Portable PA Systems Corporate Events 1 O FoF66 PPAAGEGSE S