One Sweet Sounding Speaker 

LSi7 sounds just as wonderful as all of its bigger brothers, with a little less bass. Works great for a system not needing as much power, yet it's extremely versatile. You can use it as a front channel or a surround speaker. Lsi7 also has a keyhole slot for easy wall mounting. This speaker is a real gem and will run rings around most bookshelf sized speakers on the market. Add a subwoofer and you've got the whole package
Ebony or Cherry Side Panels*

Made from real wood veneer instead of simulated vinyl. The side panels bring each side's thickness to 1.5" to further brace the cabinet against unwanted resonances. Best of all they look marvelous.

*except LSiC and LSiFX which have all black piano gloss finish
Cast Aluminum Driver Frames

Other speakers use inferior stamped steel baskets which can flex while playing, muddying up the mids. Not so with LSi series- the midbass drivers use cast aluminum baskets to prevent unwanted flex.
Aerated Polypropylene Drivers with Dynamic Balance

How does LSi sound so warm and natural? The material the speaker is made of has a lot to do with it. Aerated polypropylene is stiff on the outside providing transient response, but "chewy' on the inside providing damping and light mass. Want to learn more about the benefits of this space age material? Click here for an in-depth explanation. Dynamic Balance is a Polk perfected method of analyzing a speaker's behavior at the microscopic level with lasers to tune out unwanted resonance and distortion.
ARC Port

Featured in all models*. Unfortunately all speakers have a resonance point that will cause midbass boom causing vocals to sound "chesty." We address this problem head on with patented** ARC Port technology bringing you clear, resonance free midrange.
Perfectly Matched to LCi In-Wall/Ceiling Speakers

Do you have freestanding LSi front speakers but can't mount surrounds or a center? The perfect solution is to use Polk LCi series in-wall/ceiling speakers. They use the same Ring Radiator Tweeter and Aerated Polypropylene Drivers as their freestanding counterparts. You'll have stealth and a perfectly matching system keeping everybody happy.
Bi-Amp*/Bi-Wire Capable and Premium Connectors

All speaker connectors are gold plated for maximum signal transfer. In addition, you may bi-amp or bi-wire each speaker to further maximize sound quality.