Sold as a pair, the white JBL Control 45C/T is a passive 5.25" coaxial ceiling loudspeaker with a multi-tap transformer designed for voice amplification and foreground music reproduction in a variety of venues ranging from boardrooms to bistros. The 60W transformer allows the Control 45C/T to be driven by 70V, 100V, or 8-Ohm power amplifiers (available separately). Each Control 45C/T is equipped with a durable 5.25" polypropylene woofer and a 0.75" soft dome tweeter, yielding a frequency response of 80 Hz to 17 kHz, and a continuous program power capacity of 150W. The included removable locking input connectors, detachable grilles, cutout templates, paint shields, and C-ring / tile rail suspension systems contribute to easy installation.