Loudspeaker Brochure

AERATED POLYPROPYLENE CONE
Polk Audio LSi Series Loudspeakers feature ultra stiff, well damped, surprisingly lightweight
Aerated Polypropylene Cones. They’re 20% lighter than conventional poly and 35% lighter than
aluminum cones. Dynamic Balance composite materials tune out driver resonance and foamed
air pockets add damping without adding mass. These cones deliver spectacular midrange
clarity , punchy bass and high efficiency . See more about Aerated Polypropylene Cones at
www .polkaudio.com/catalog/technology/.
polk
technology
WWW.POLKAUDIO.COM 3
Scanning electron microscope
image of Aerated Poly Cone
showing air pockets.
LSi 15
LSi 25
“I am a little stunned by the Polk LSi15…
outstanding accuracy, detail and nuance…”
The Absolute Sound,
April/May 2002