Polk Audio Lsi Series - Manual (Page 5)

ARC ® PORT
A loudspeaker’s internal standing wave resonance can impart a “thick” or “chesty” character
to the sound of voices. Polk Audio’s patented Acoustic Resonance Control Port System is tuned
to cancel this resonance for utterly clear, accurate and natural midrange. See more about
ARC Port at www.polkaudio.com/catalog/technology/.
polk
technology
WWW.POLKAUDIO.COM 5
LSi 9 LSi 7
“[Polk has] hit the bull’s-eye with the LSi9. Not only
is it an exceedingly refined, first-class performer, it
has specific sonic qualities that make it stand out
in its price class.”
SoundStage!.com,
April 2002