Polk Audio CSI A4 Center Channel Speakers (Unit)Orientation Horizontal Height 6. 875" (17. 46 cm) Width : 20" (50. 8 cm) Depth 8. 75" (22. 23 cm) Weight 15. 5 lbs (7. 03 kg) Front Array Driver Complement (2) 5. 25" (13. 34 cm) d (Round) Dynamic Balance drivers with polymer composite cones and rubber surrounds Midrange (1) 1" (2. 54 cm) d (Round) Dynamic Balance silk polymer dome Tweeter Total Frequency Response 55 Hz 27,000 Hz Nominal Impedance 8 ohms Sensitivity (1 watt @ 1 meter) 89 dB Lower and

the CinemaX P2 delivers deep blacks and bright whites

so you can easily upgrade

A5: You can buy the Mission LX-C2 Centre Channel Speaker from authorized Mission retailers and reputable online stores

power supplies

allowing for large screen sizes (36

A1: The Polk Audio Monitor XT20 Bookshelf Speaker boasts a 6

allowing you to connect your computer and improve digital audio playback

31" in diameter

and smart capabilities

With a throw ratio of 1

Compatible with most quality amplifiers and AV receivers

What is the impedance rating of the A90