Power handling (RMS/Program): 500 Watts / 1000 Watts High sound pressure level: 98 dB SPL @ 1 W / 1 M Frequency response: 38 Hz - 250 Hz Durable die-cast handles One 35 mm socket on top for pole mounting Speakon-type connectors and 1/4" phone jacks (In and Link Out) Solid steel grille protection The Phonic Impression Series is a complete line of sound reinforcement speakers and subwoofers for use on stage and as floor monitors. The Impression Subwoofers are available in 15" and 18" with output power of up to 1400 Watts (program). They feature wide frequency responses and high sound pressure levels. The built-in 35 mm mounting socket means you"ll never be at a loss for placement possibilities.