Control 328CT
8" Coaxial Ceiling
Loudspeaker with HF
Compression Driver


8" Coaxial Ceiling Loudspeaker with HF Compression Driver
Control 328CT has been engineered from the ground up to deliver exceptional next-generation performance in a coaxial point source design ceiling loudspeaker.

  • 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.
  • Components
    • 200 mm (8 in) woofer with Kevlarreinforced cone and 50 mm (2 in) voice-coil.
    • 25 mm (1" exit) compression driver.
  • Extraordinary clarity for speech and vocals with extended frequency response for music.
  • 250 Watt power handling with very high sensitivity provides high SPL capability.
  • Advanced high-slope crossover network for constant coverage and smooth, natural midrange.
  • Clean, contemporary grille and optional backbox available.

Frequency Range (-10 dB) 45 Hz – 18 kHz
Long-Term System
Power Rating
250 W (1000 W peak), 2 hrs
150 W (600 W peak), 100 hrs
Taps 70V: 68W, 34W, 17W, 8.5W
100V: 68W, 34W, 17W
Frequency Response (±3 dB) 60Hz – 16 kHz
Coverage Pattern 120° conical, broadband
Nominal Impedance (321C) 8 ohms
Directivity Factor (Q) 7.0 (Avg 1k - 16kHz)
Directivity Index (DI) 8.5dB (Avg 1k - 16kHz)
Sensitivity (2.83V@ 1m) 93 dB measured half-space
Maximum SPL 118 dB cont ave (124 dB peak)
Crossover Network 1.9 kHz, 3rd order (18 dB/oct) high-pass plus conjugate
Dimensions (H x W x D) 305 mm (12.0 in.) diameter round baffle x depth from back of baffle
of 218 mm (8.6 in)