Control 328C has been engineered from the ground up to deliver exceptional next-generation performance in a coaxial point source design ceiling loudspeaker.Frequency Range(-10 dB) : 45 Hz – 18 kHzLong-Term System Power Rating : 250 W (1000 W peak), 2 hrs150 W (600 W peak), 100 hrsSensitivity (2.83V@ 1m): : 93 dB4 measured half-spaceFrequency Response(±3 dB) : 60Hz – 16 kHzCoverage Pattern : 120° conical, broadbandDirectivity Factor (Q): : 7.0 (Avg 1k - 16kHz)Directivity Index (DI): : 8.5dB (Avg 1k - 16kHz)Maximum SPL6: : 118 dB cont ave (124 dB peak)Crossover Network: : 1.9 kHz, 3rd order (18 dB/oct) high-pass plus conjugate to HF, 2nd order low-pass to LFNominal Impedance (321C): : 8 ohmsDimensions (H x W x D) : 305 mm (12.0 in.) diameter round baffle x depth from back of baffle of 160 mm (6.3in) Extraordinary clarity for speech and vocals with extended frequency response for music Consistent 120° broadband pattern control covers an extremely large area Shaped mounting baffle provides the pattern control of a 300 mm (12 in) horn from a 200 mm (8 in) driver 200 mm (8 in) woofer with Kevlarreinforced cone and 50 mm (2 in) voice-coil Advanced high-slope crossover network for constant coverage and smooth, natural midrange Clean, contemporary grille and optional backbox available 25 mm (1" exit) compression driver 250 Watt power handling with very high sensitivity provides high SPL capability