Polk Audio LSiM704c
Model #: Polk Audio LSiM704c
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Tired of turning your system up to
hear the dialog and down because the effects are too loud? Then put your money
in a high performance center channel speaker like the LSiM704c. Big enough to
stand up to the power of the floorstanding LSiM705 or the LSiM703 bookshelf
loudspeaker, you can use this center channel speaker to perfectly match the size
and performance you’re looking for. The LSiM704c has all the earmarks of a
great center: crystalline detail, fast natural midrange and impactful bass. With
its dynamic sonic engine, twin 5 1/4-inch woofers and a dual PowerPort®
venting system, the LSiM704c will reveal the whisper, the shout and the
thump-thump of the helicopter flying over.
Polk’s exclusive dynamic sonic
engine design optimizes the midrange driver and the ring radiator tweeter in
separate interior chambers for improved transient response, superior imaging and
greater horizontal off-axis response.
Enhanced, reengineered ring radiator tweeters extend top-end response for
incredible details and realistic imaging.
Our innovative overhung voice coil design augments the excursion length for
subwoofer drivers, increasing their power-handling capabilities and enhancing
Extended Linear Motion voice coil design allows lots of movement in a limited
space, eliminating impedance and extending mid- and high-frequency response.
Lightweight, rigid cast aluminum baskets are designed for precision motor
alignment with unobstructed linear movement and ample venting.
Klippel motor optimization uses laser measurement technology to ensure a smooth
excursion path at either end of the volume spectrum for uniform performance at
both low and high volumes.
Polk’s proprietary, patented technology allows our engineers to design
out distortion-causing driver and system resonances, so you only hear the good
Our super cell aerated polypropylene cone is the ideal balance of lightweight
stiffness (for more efficient action with less distortion-causing flex) and
superior damping properties.
Durable, computer-modeled, injection-molded butyl rubber surrounds suppress
unwanted cone resonances for a lifetime of reliable sound.High quality, heavy
duty LSiM enclosure construction features 1.0" MDF on the sides, 3/4"
MDF on the back and bottom and 1 1/4-inch baffles with substantial internal
bracing and separate interior cabinetry for each driver. These exceptionally
robust materials efficiently eliminate cabinet resonances and standing waves for
less distortion and more dynamic transparency.
Beautiful furniture-grade hardwood veneer cabinet finishes, with sleek trim
accents and no visible screws.
Super-thin zero-diffraction grilles lock in place magnetically, and never
obscure your sound.
bass venting is Polk’s patented design for smoothly transitioning the air flow
from the port into your listening area, eliminating turbulence and distortion,
for bigger, more efficient, deep bass impact.
All Polk loudspeakers are timbre-matched within their series, designed with the
same components throughout, to achieve seamless speaker-to-speaker blending
effects in multi-channel systems.
Dual gold-plated, professional-style 5-way binding posts, for the most secure
Dual binding posts allow bi-amp or bi-wire connections, for the ultimate in
customized high performance audio.
All Polk products are made using the best materials and the most advanced
manufacturing techniques. They pass the industry’s most , including drop
testing, extreme signal response and UV & salt exposure testing. Polk
loudspeakers are built to perform for a lifetime.
The LSiM Manual Here: