active 3-way speaker, 15"+6"+1", amplifiers 300+100+100W, SPL 126 dB, 38 Hz - 20 kHz, 1116x484x460/45.5kg These affordable 3-way speakers provide great output power, are made made of real wood, they have integrated control electronics that provide a perfectly tuned sound, without the need for complex settings. The simplicity known from the popular SRM series, but with enough power for larger events , but to achieve the high performance levels required at big events, there is still no substitute for good old wood. The Mackie SRz series brings the simplicity of use and total integration known from smaller SRM boxes. To be specific, SRz boxes are built from plywood 18mm of Baltic birch and pressure-sprayed structural lacquer Integrated active electronics Thanks to the complete integration of active processing electronics, the SRz do not need any additional amplifiers, preamplifiers, crossovers or processors. The internal SRz amplifier module is attached to a gigantic aluminum heatsink, which eliminates the need for noisy fans. Active electronics circuits inside provide division, overdrive protection and time correction. Most importantly, however, the integration of speaker, amplifier and signal processing allowed the mackie development team to maximize output power and frequency response. Tri-amp, with 300W RMS LF, 100W RMS MF and 100W RMS HF amplifiers Integrated active electronics: precision crossover, electronic delay correction, phase equalization and equalization Patented WaveFront™ horn technology provides a wide radiation angle and natural sound 44mm (1.75" diaphragm) titanium compression driver with optimized symmetrical "phase plug" 152mm (6") horn-loaded, high-performance mid-range speaker 381mm (15") LF woofer with high-temperature coil 126 dB SPL @ 1kHz / 1 meter Frequency response: 38Hz to 20kHz Complete electronic protection of components and circuits Balanced handles for easy transport