JBL 8124 4" Open-Back Ceiling Speaker. 70V/100V taps at 6W, 3W, 1.5W (plus 0.75W at 70V), high 93 dB sens, 60 Hz to 18 kHz, for non-plenum applications, 1.2 kg (2.5 lb). (Priced as each, sold in packages of 4 pcs)