General Features Wide frequency that offers hammer like tight booming base from 50Hz to clear articulate treble at 20KHz for the PA550 and 40Hz~25KHz for the PA450. High output Precision titanium compression driver offers long lasting superb sound. High SPL Output. Multi-cell high-dispersion horn with ultra-wide audience coverage. 3 Ergonomic and balanced handles for ease of portability. Stackable, stand mountable, arrayable, and multiple fly points for unmatched versatility. Reclines for use as an effective floor monitor. Tough, impact-resistant, lightweight molded enclosure. ACTIVE VERSION FEATURES PA550 Bi-amplified, with 400 watts (RMS), 800 watts (program) PA450 Bi-amplified, with 330 watts (RMS), 600 watts (program) P550 with 300 watts(RMS), 600 watts (program) P450 with 250 watts(RMS), 500 watts (program) Built-in precision 24dB/oct. Linkwitz-Riley electronic crossover 3-input mixer, 2-band EQ and link out Long-throw low frequency transducer Electronic Time Correction, Phase Alignment, & Equalization Hign sound pressure level, 98dB SPL@ 1w/1M Speakon and 1/4" jack connectors include PASSIVE VERSION High sound pressure level, 98dB SPL @ 1W/1M Speakon and 1/4" jack connectors included