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Dynamic Sonic Engine
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Dual woofer
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High Quality Sound
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Fills your world with its wide, dynamic soundstage and its capability to effortlessly achieve truly staggering volume levels. The LSiM705 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.
Accurate dialogue
The ring radiator tweeter features several improvements from the version in the earlier LSi line. A slight reshaping of the tweeter's bullet-shaped phase plug allows it to move even farther out of the baffle, while a redesigned diaphragm has made the tweeter even more efficient.
Advanced driver material
The original LSi speakers featured a light, stiff mineral-filled polypropylene cone that was "puffed up" with injected air to form a honeycomb-like structure. The new super cell aerated polypropylene uses larger "puffed cells" to create a cone material that's thicker yet lighter than the original.
Dual woofers
The oval shape helps them produce tight low-frequency music and movie sounds while maintaining a narrow cabinet width. Plus, each woofer has its own PowerPort® — a unique Polk design that positions specially designed "cones" at the mouth of the bass ports to direct moving air to eliminate bass-stealing turbulence.
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Qty Included
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1
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Availability
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US
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Height
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47" (119.38 cm)
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Width without Base
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8.31" (21.11 cm)
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Depth without Base
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14.38" (36.53 cm)
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Weight
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78 lbs (35.38 kg)
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Width with Base
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9.25" (23.5 cm)
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Depth with Base
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16.25" (41.28 cm)
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Driver Enclosure Type
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Sealed
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Driver Complement
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(1) 3.25" (8.26 cm) d (Round) Super Cell Aerated Polypropylene - Mid/Woofer
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(2) 5" (12.7 cm) d (Round) Super Cell Aerated Polypropylene - Midrange
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(2) 7" (17.78 cm) h x 5" (12.7 cm) w (Oval) Cassini oval, Super Cell Aerated Polypropylene - Subwoofer
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(1) 1" (2.54 cm) d (Round) Enhanced Ring Radiator - Tweeter
AUDIO QUALITY
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Total Frequency Response
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22 Hz → 40,000 Hz
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Nominal Impedance
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8 ohms
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Lower and Upper -3dB Limits
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42 Hz → 30,000 Hz
CROSSOVER
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Type
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Orth Crossover Design
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Midrange/Woofer Crossover Frequency
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100 Hz
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Tweeter/Midrange Crossover Frequency
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2.8 Hz
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A/V Receiver Crossover Settings
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(40 Hz)
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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
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Enhanced, re-engineered ring radiator tweeters extend top-end response for incredible details and realistic imaging
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Extended linear motion voice coil design helps extend mid- and high-frequency response
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Klippel motor optimization uses laser measurement technology to ensure a consistent excursion path at either end of the driver's travel for uniform performance at both low and high volumes
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Polk's proprietary, patented Dynamic Balance technology allows our engineers to design out distortion-causing driver and system resonances, so you only hear the good sounds
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Speaker Design
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Sensitivity
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Frequency Response Range
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Maximum Power Handling
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Impedance
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