Polk Audio LSi25 Floorstanding Loudspeaker

Polk Audio Updated: 2008-11-16 RSS

The LSi25 features:

* Superior musical accuracy, serious theatrical impact.
* Designed for high definition formats such as SACD and DVD-Audio.
* Built-in 10" powered subwoofer for true full-range performance from all audio and video sources.
* Available with either natural Cherry or Ebony real wood veneer side panels.
* Mirror imaged pairs for tightly focused highs and true three-dimensional imaging with minimized room reflections: Hear what you've been missing!
* Cascade tapered driver array improves image focus and detail.
* Ultra high performance Ring Radiator tweeters, previously unavailable in speakers at this price, for extended frequency response, low distortion, excellent dynamics with superior detail and transparency.
* 5 ¼" Dynamic Balance drivers with Aerated Polypropylene cones for wide response and low distortion.
* Cast aluminum driver baskets resist flexing and "ringing" for ultra-tight bass and coloration-free midrange.
* Side panels are 1-1/2" thick for a totally inert enclosure - you hear all the music and only the music.
* Precise, deep bass response provided by a floor-coupled PowerPort® venting system.
* Smooth, natural midrange reproduction thanks to patented Acoustic Resonance Control technology.
* Magnetically shielded for safe placement near video monitors.
* Premium crossover components for consistent high-end sound quality.
* Mylar bypass capacitor in the high-pass crossover extends and flattens high frequency response. Hear musical details you've never heard before!
* Open architecture low diffraction grille for spacious imaging.
* Dual (bi-ampable) gold plated 5-way binding post inputs for the most secure wire connections and the most versatile wiring applications.
* Low level line (filtered) and LFE (unfiltered) subwoofer inputs
* Adjustable leveling feet/carpet spikes for the ultimate stability on any type of floor.

Driver Complement
Subwoofer: 1 - 10" Diameter (25.40cm) Polymer composite cone with rubber surround (shielded)
Mid/Woofer: 2 - 5-1/4" Diameter (13.34cm) Dynamic Balance with Aerated Polypropylene cone, cast basket and rubber surround (shielded)
Tweeter: 1 - 1" Diameter (2.54cm) Dynamic Balance Ring Radiator (shielded)

Electrical
Overall Frequency Response: 20Hz - 27kHz
Lower -3dB Limit: 30Hz
Upper -3dB Limit: 26kHz
Nominal Impedance: 4 ohms
Recommended Amplifier Power: 20 - 300 w/channel
Efficiency: 88 dB
Crossover (mid-high array): Driver 1: HPF at 80Hz 12dB/oct, LPF at 800Hz 12dB/oct.
Driver 2: HPF at 80Hz 12dB/oct, LPF at 2.4kHz 12dB/oct.
Tweeter: HPF at 2.4kHz 18dB/oct.
Crossover (subwoofer): LPF variable 60Hz - 180Hz 12dB/oct.
Inputs: Dual gold plated 5-way binding post speaker inputs. Line level subwoofer input (filtered) and LFE subwoofer input (unfiltered)
Outputs: Line level passthrough

Dimensions
Cabinet Size: 49-3/4" H x 8-5/8" W x 17" D (126.36cm H x 21.91cm W x 43.18cm D)
Footprint Size: 9-5/8" W x 16-3/8" D (24.45cm W x 41.59cm D)
Enclosure Type (mid-high array): Vented via dual ARC ports
Enclosure Type (subwoofer): Vented via floor-coupled Power Port

Subwoofer Amplifier Specs
Power Output: 150 watts Continuous Average Output
Dynamic Power Output: 300 watts