Our Product Research Team
At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere.
That's because we have our own in-house Product Research team — they open the box,
verify contents, check the owner's manual, and record dimensions, features and specs.
We stay on top of new products and technologies to help people make informed choices.
High Efficiency Design: The Polk Audio DXi Series speakers
feature a high efficiency design; meaning better sound and more volume using
Dynamic Balance Driver Technology: Dynamic Balance is
a proprietary Polk Audio technology using laser imaging to determine what
combination of speaker materials create the least amount of resonance.
Eliminating resonance in speakers results in a wide, smooth response and
Klippel Optimized Components: For a driver to reproduce
complex sounds accurately, the cone must move exactly the same distance and
manner in both directions. The Klippel distortion analyzer, a device that
uses a laser and sophisticated software to do large-scale analysis of drivers
in motion, lets Polk optimize the speaker's motor structure, voice coil alignment,
and suspension to yield the best possible performance.
Composite Cones: Each speaker features a Dynamic Balance,
Bi-Laminate composite, polypropylene cone woofer. These composite cones feature
tremendous stiffness-to mass ratio, resulting in faster transients and finer
Rubber Surrounds: For a smoother response and improved
durability, the speaker uses rubber surrounds.
Tweeters: The DXi 691s feature a 1" silk/polymer dome
tweeter and a 3/4" aluminum dome super tweeter for clear, accurate highs.
The tweeters employ light-weight neodymium magnets for higher efficiency.