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


8" Coaxial Ceiling Loudspeaker with HF Compression Driver
Control 328C 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 Kevlarre inforced 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
Sensitivity (2.83V@ 1m) 93 dB4 measured half-space
Frequency Response (±3 dB) 60Hz – 16 kHz
Coverage Pattern 120° conical, broadband
Directivity Factor (Q) 7.0 (Avg 1k - 16kHz)
Directivity Index (DI) 8.5dB (Avg 1k - 16kHz)
Maximum SPL 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 LF
Nominal Impedance (321C) 8 ohms
Dimensions (H x W x D) 305 mm (12.0 in.) diameter round baffle x depth from back of baffle
of 160 mm (6.3in)