Yamaha Natural Sound Custom Easy-to-install In-Ceiling Flush Mount 2-Way 120 watts Speaker (Set of 4) with 1 New Natural Sound In-Ceiling Speaker System with Easy Installation Design 8" PP Mica Cone Woofers 1" Soft Dome Tweeter 120 Watts / Frequency response 45Hz to 24,000Hz / Impedance: 6 Ohms / Crossover frequency: 6,000Hz / Sensitivity: 88dB Frame size diameter: 10-9/32" / Paintable Aluminum Grille with Protective Cover included