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Polk Audio Logo

The Ultimate Floorstanding Loudspeaker

Model # LSIM707

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The exclusive Polk Audio Dynamic Sonic Engine allows the LSiM707 to engulf listeners. The unique alignment of internal components allows this speaker within the speaker to disperse sound over a wide area.


  • Separate chambers for the midrange and tweeter improve transient response and imaging
  • Cassini oval subwoofer drivers have more surface area for superior low-frequency response
  • Klippel motor optimization ensures smooth volume spectrum ends for uniform performance at all volumes
  • Patented Dynamic Balance® technology eliminates resonance so you hear good sound instead of distortion
Total Pieces 1
Audio Quality
Total Frequency Response 20 Hz → 40 kHz
Sensitivity (1 watt @ 1 meter) 88 dB
Cabinet Warranty 5 years
Drivers Warranty 5 years
Original Purchaser Only Yes
---Floor Standing Speaker---
Qty Included 1
Height with Base 50.81" (129.06 cm)
Width with Base 9.5" (24.13 cm)
Depth with Base 18.44" (46.84 cm)
Weight 99.2 lbs (45 kg)
Mid-High Array Driver Enclosure Type Sealed
Mid-High Array Driver Complement
  • (1) 1" (2.54 cm) d (Round) Enhanced Ring Radiator - Tweeter
  • (1) 3.25" (8.26 cm) d (Round) Super Cell Aerated Polypropylene - Midrange
  • (1) 6.5" (16.51 cm) d (Round) Super Cell Aerated Polypropylene - Mid/Woofer
  • (2) 6" (15.24 cm) h x 9" (22.86 cm) w (Oval) Cassini oval, Super Cell Aerated Polypropylene - Subwoofer
Type Orth Crossover Design
Midbass/Woofer Crossover Frequency 100 Hz
Tweeter/Midrange Crossover Frequency 3 Hz

Extended warranties are usually very inexpensive and can save you thousands in the future. It's simple and inexpensive to purchase extended warranties and one of the smartest ways to protect your investment.

Electronics can be large, heavy, and expensive and you probably don't have the special tools or expertise needed to fix them in a crisis. If you can spare a few thousand dollars without batting an eyelash for new electronics should they break tomorrow, don't buy a warranty. But if you're like most of us, protect yourself by purchasing inexpensive extended warranties when you buy a new product and save yourself big money in the long run.

Professional delivery and installation is available for every product we sell. We would be happy to coordinate delivery and installation for you.

Questions or Comments?
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