The PC-648R is a ceiling mount speaker with a resin panel and speaker frame.
Special design for thin ceiling
Spring clamp mechanism for easy speaker mounting to the ceiling
Speaker component: 12 cm (5″) cone-type
Rated Input: 6 W (100 V line), 3 W (70 V line)
Tappings: 100 V line: 1.7 kΩ (6 W), 3.3 kΩ (3 W), 10 kΩ (1 W)
Freq Reasponse: 100 Hz – 18 kHz (peak -20 dB)