From the Manufacturer The RC80i features a beefy 8-inch woofer to produce the maximum amount of bass and a one inch dome tweeter for depth and detail, resulting in rich lifelike sound from an in-ceiling speaker-performance unheard of just a few years ago. An ideal solution for areas requiring big, room-filing sound without the big speaker cluttering up your room, The RC80i's wide dispersion capability means you'll hear great sound no matter where you are in the room.key featuresPaintable grilles allow you to make your speakers disappear completely into your painted walls (but you can always leave them white too).Out of the box into the ceiling installation. The RC80i uses rugged stainless steel hardware and powder-coated aluminum grille for years of dependable performance. (Please note that RCi Series loudspeakers are not suitable for exposed outdoor use. For outdoor applications, use our Atrium Series speakers). Swivel tweeter. The RC80i features a swiveling tweeter so you can aim it toward the listening area for greater accuracy. take a look inside this product technology Dynamic Balance® and Klippel Optimization Like all Polk speakers, the transducers in the RC80i speakers are products of Dynamic Balance technology and Klippel Optimization. A Dynamic Balance tweeter or driver has been designed using microscopic testing, materials science, and precision-designed interfaces to reduce or eliminate mechanical breakup that adds distortion and colors the sound. Klippel Optimization ensures the speaker will perform well at both low and high volumes levels.Blue Polymer Woofers with Rubber Surround Provide excellent damping and bass response while resisting deterioration. Your RCi speakers should last longer than your house. Other speakers use flimsy paper cones and foam surrounds that fall apart due to time and exposure.Timbre Matched The RC80i, like all RCi series speakers, is timbre matched to our freestanding speakers - such as Polk Monitor, TSi and OWM series, just in case you need in-ceiling surround speakers to match your freestanding fronts. why you should consider this productIf you're looking to fill a room or your home with life-like sound, you should seriously consider the RC80i for its high performance audio, ease of installation, and amazing value. Use RC80i's all around your home where you care about good sound or as rear channel surround speakers in your home theater system. technical specifications Driver Complements Tweeter 1" Diameter (2.54cm) Dynamic Balance tweeter with metalized soft dome in ball-and-socket swivel mount Mid/Woofer 8" Diameter (20.32cm) Dynamic Balance driver with mineral-filled polymer cone and rubber surround Electrical Total Frequency Response 35Hz - 20kHz Upper -3dB Limit 20Hz Lower -3dB Limit 50Hz Nominal Impedance 8 ohms Efficiency 90 dB Recommended Amplifier Power 20 - 100 Watts per channel Inputs Spring-loaded clips Dimensions Overall Depth 3 5/8" (9.21cm) Overall Diameter 10 3/4" (27.30cm) Shipping Unit of Measure Pair Total Shipping Weight 10 pounds Installation Cut-Out Diameter 9 3/8" (23.81cm) Mounting Depth (assumes 1/2 in) 3 1/8" (7.94cm) Pre-Construction Bracket PB LC80i Warranty* Speaker Warranty Lifetime *To ensure a valid warranty, Polk loudspeakers must be purchased through an Authorized Polk Audio home or car loudspeaker Dealer (such as Amazon.com). (If you're not sure a dealer is "authorized," call Polk Audio at 1-800-377-7655, and ask us.) The warranty is not transferrable, that means it applies only to the original purchaser. If you purchase your speakers from a private individual, that product is considered "used" and has NO factory warranty, no matter what the seller implies. The warranty is VOID if the serial number of the speaker has been removed or defaced. If you have any questions about your warranty coverage, or you think you need service, call Polk Customer Service at 1-800-377-7655. We?re here to help you get the most from your new spea