MACKIE PROFESSIONAL ACTIVE

SR1521z 15" Two-Way Active Loudspeaker
Mackie's most affordable professional active loudspeaker system.Bi-amplified, with 300W RMS low-frequency and 100W RMS high-frequency amplifiers. 44mm (1.75") titanium dome compression driver with optimized symmetric phase plug. 381mm (15") LF woofer with high-temperature voice coil.130 dB SPL @ 1kHz / 1 meter.Frequency Response: 40Hz to 20kHz
SR1530z 15" Three-way Active Loudspeaker
Tri-Amplified, with 300W RMS low-frequency, 100W RMS mid-frequency and 100W high-frequency amplifiers Patented WaveFront™ horn design provides wide dispersion and very natural sound 44mm (1.75") titanium dome compression driver with optimized symmetric phase plug 152mm (6") horn-loaded, high-output mid-range transducer 381mm (15") LF woofer with high-temperature voice coil 126 dB SPL @ 1kHz / 1 meter Frequency Response: 38Hz to 20kHz
SR1522z Dual 15" Two-way Active Loudspeaker
Bi-Amplified, with 400W RMS low-frequency and 100W RMS high-frequency amplifiers  44mm (1.75")titanium dome compression driver with optimized symmetric phase plug  Dual 381mm (15") LF woofers with high temperature voice-coils 133 dB SPL @ 1kHz / 1 meter Frequency Response: 43Hz to 20kHz