Yamaha NS-IW660 3-Way Passive In-wall Speaker for Custom Professionals - Pair Recommended Usage In-wall front / Surround speakers Type 3-way in-wall Woofers 6-1/2" Kevlar® cone woofer MidRange Driver 1-5/8" aluminum dome driver Tweeters 1" titanium dome tweeter Swivel Tweeter and Midrange Driver Yes Paintable Grill with Protective Cover Included Yes Frequency Response 50 Hz - 28 kHz Sensitivity 88 dB/2.83 V/1 m Input Power (Max / Nominal) 150 W / 50 W Impedance 8 ohms Product Dimensions (W x H x D) 11-5/16" x 8-29/32" x 3-13/16" Mounting Depth 3-1/16" Product Weight (lbs. each) 4.4