Polk Audio LSiM Series 47" Tall Floor Standing Speaker

Product Overview

The LSiM705 fills your world with its wide, dynamic soundstage and its capability to effortlessly achieve truly staggering volume levels. The LSiM705 features the same component complement as the larger LSiM707 loudspeaker, on a slightly smaller scale. It includes a 5 1/4-inch mid-woofer of lightweight super cell aerated polypropylene for smooth blending with its dual 5x7-inch Cassini oval subwoofer radiators enhanced by Polk’s patented PowerPort® bass venting. Its 1-inch ring radiator tweeter, a feature usually found only in exotic speakers, reveals pinpoint details for realistic imaging. Use the LSiM705 in midsized rooms where you want the full-on impact of the legendary Polk sound.  

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.

Extend top-end response for incredible details and realistic imaging.

With more surface area than round drivers, dramatically improve low-frequency response for deep, well-blended bass.

Augments the excursion length for subwoofer drivers, increasing their power-handling capabilities and enhancing bass response.

Design allows lots of movement in a limited space, eliminating impedance and extending mid- and high-frequency response.

Are designed for precision motor alignment with unobstructed linear movement and ample venting.

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.

Technology allows our engineers to design out distortion-causing driver and system resonances, so you only hear the good sounds.

Is the ideal balance of lightweight stiffness (for more efficient action with less distortion-causing flex) and superior damping properties.

Injection-molded butyl rubber surrounds suppress unwanted cone resonances for a lifetime of reliable sound.

Orth crossovers increase lower-order power handling and smooth the impedance curve, for more efficiency and better high frequency response.

Heavy duty LSiM enclosure construction features 1.0" MDF on the sides, 3/4" MDF for 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.

Hardwood veneer cabinet finishes, with sleek trim accents and no visible screws.

Zero-diffraction grilles lock in place magnetically, and never obscure your sound.

PowerPort 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.

Useful Documents