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Polk To Demo Select Flagship LSiM Home Audio Speaker Models At 2011 Rocky Mountain Audio Fest

Newly Engineered LSiM Series Features Stunning New Technologies In A Tour-De-Force Performance Of Design And Engineering Newly Engineered LSiM Series Features Stunning New Technologies In A Tour-De-Force Performance Of Design And Engineering Newly Engineered LSiM Series Features Stunning New Technologies In A Tour-De-Force Performance Of Design And Engineering Newly Engineered LSiM Series Features Stunning New Technologies In A Tour-De-Force Performance Of Design And Engineering

DENVER, CO, October 10, 2011 - Polk Audio®, the Speaker Specialists®, is featuring, in its 2011 Rocky Mountain Audio Fest exhibit, a demonstration of its new top-of-the-line home audio speaker series that brings the company's legendary sonics to their highest pinnacle yet.  The new LSiM series utilizes Polk's most advanced engineering to date, achieving remarkable high-end performance that makes a true audiophile listening experience accessible to music lovers everywhere.


“We're happy to report that the new LSiM reference line is just now shipping to our dealers,” says Polk’s Vice President of Product Line Management, Mark Suskind. “The LSi line has been Polk’s flagship selection for almost a decade, and the new LSiM series further ups the ante, making it the most advanced speaker line we've built in our 40 year history.”

The new Polk LSiM series encompasses a full range of tower, bookshelf, center and surround channel models, each of which is designed with the finest materials and Polk's most advanced acoustic engineering.  The performance objectives for the series were set with an exceptionally high bar -- - open, transparent, three-dimensional sound, with accurate tonal and temporal response at all frequencies; extended dynamics; uniformly wide dispersion; deep, tight, integrated bass; and compatibility with a broad range of past, present and future electronics.  Each of these difficult sonic objectives has been achieved in the new LSiM series.


Standing front and center in Polk’s exhibit are two 4-way floor-standing tower models, the LSiM 707 and LSiM 705, the latter of which will be demonstrated at RMAF.  Each tower features state-of-the-art transducers built with Polk's Dynamic Balance® design technology, which combines the latest in composite materials and computer-assisted geometry to create drivers with extraordinarily low distortions and artifacts.  Both towers sport a stunning array of these high performance drivers, highlighted by Polk's Dynamic Sonic Engine enclosure, a single molded component that carries both a Polk proprietary 3.25” Extended Linear Motion (ELM™) mid-range driver and a 1.0” Advance Isotropic ring radiator (AIR™) tweeter.

Combining these transducers in a single optimized array produces an uncommonly wide and uniform dispersion pattern. The top-of-the-line LSiM 707 complements this array with a 6.5" ELM mid-woofer driver and dual 6”x9" ELM subwoofers featuring Polk's PowerPort®, which maximizes low-bass energy ordinarily lost as air turbulence and heat  in exiting the enclosure. 

The smaller LSiM 705 features the identical Dynamic Sonic Engine for high frequencies and midrange, along with Polk designed  ELM 5.25" mid-woofer and dual 5”x7" ELM subwoofers.  A bookshelf-sized version of the towers, the LSiM 703, utilizes the same technologies as the towers, minus the internal subwoofer drivers. 


Two center channel models are offered in the flagship LSiM series.  The larger LSiM 706c features the same AIR ring tweeter and ELM 3.5" mid-bass driver that characterizes the Dynamic Sonic Engine of the larger tower models, flanked by two ELM 6.5" mid-bass drivers with a rear port design.  A smaller center channel model, the LSiM 704c features the same layout, only with ELM 5.25" mid-bass drivers. 

The LSiM 702f/x surround model completes the series for a multichannel setup, offering the Dynamic Sonic Engine ELM 3.25’ mid-range, 1 x 1.0” AIR ring radiator tweeter and a ELM 6.5” mid-woofer driver.  The 702f/x also includes a proximity switch to optimally compensate for placement near corners in the listening area.

All the speakers have been timbre matched for a perfectly blended and balanced acoustic environment.

The Polk LSiM series features Polk's most advanced material engineering, with Super Cell Aerated polypropylene cones that reduce mass while minimizing distortion.  Driver baskets are built from cast aluminum frames that provide superior rigidity and exceptionally flat frequency response.  Butyl rubber surrounds ensure outstanding linearity through many years of trouble free performance.  Finishing touches include magnetic, non-diffracting grills, easy-leveling floor spikes and rubber trims around the driver baskets that create a cosmetically clean fit and finish.

About Polk Audio
Polk Audio ( is an award-winning designer and manufacturer of high performance audio products and the largest audio brand of DEI Holdings, Inc. Founded in 1972, Polk's products include loudspeakers and electronic components for home, auto and marine applications, the market leading SurroundBar single speaker surround systems, the world's first audiophile-grade active IP-addressable loudspeaker, the world’s only wireless single-speaker rear surround solution, the F/X Wireless Surround speaker, and the audio industry’s first line of performance headphones for serious athletics and active individuals.


This article was last modified July 17, 2012

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