The Big Center Channel for Serious Listeners

  • 1,199.95 Each
  • 1,199.95 Each
  • Free ground shipping on all orders

The Flagship Center Channel

Polk's LSi M 706c is more than capable of handling the heavy lifting required of a center channel speaker in a high-performance home theater system. It delivers the kind of effortlessly wide, deep soundstage and realistic imaging that puts you in the middle of the on-screen action.

  • Tech Specs
  • Reviews
  • Q & A
  • Support
Tech Specs


  • Total Pieces


  • Cabinet Warranty
    5 years
  • Drivers Warranty
    5 years
  • Original Purchaser Only

Shipping Cartons

  • Carton 1
    46 lbs (20.87 kg)

Center channel speaker

  • Qty Included
  • Availability
  • Height
    9" (22.86 cm)
  • Width
    28.75" (73.03 cm)
  • Depth
    13.81" (35.08 cm)
  • Weight
    42.3 lbs (19.19 kg)
  • Driver Complement
    • (2)  6.5" (16.51 cm) d (Round) Super Cell Aerated Polypropylene - Mid/Woofer
    • (1)  3.25" (8.26 cm) d (Round) Super Cell Aerated Polypropylene - Midrange
    • (1)  1" (2.54 cm) d (Round) Enhanced Ring Radiator - Tweeter

Audio Quality

  • Total Frequency Response
    30 Hz → 40 Hz
  • Nominal Impedance
    8|||| ohms
  • Lower and Upper -3dB Limits
    50 Hz → 30 Hz


  • Type
    Orth Crossover Design
  • Midrange/Woofer Crossover Frequency
    280 Hz
  • Tweeter/Midrange Crossover Frequency
    2.8 Hz
Q & A

Dynamic Sonic Engine

Made up of a 3-1/4" midrange driver and a 1" ring radiator tweeter in its own acoustically sealed enclosure, this tightly spaced duo acts like a "mini-monitor." The precise alignment of the midrange and tweeter allows them to disperse sound over a wide, uniform area with excellent off-axis response in the critical 200 Hz to 2,000 Hz midrange.

Advanced driver material

The new super cell aerated polypropylene uses larger "puffed cells" to create a cone material that's thicker yet lighter than the original. It's used in both the midrange and woofers, allowing them to move faster and with more efficiency.


Designed exclusively by Polk, this specially shaped "cone" at the mouth of the bass port directs moving air to eliminate bass-stealing turbulence. No turbulence means no wasted power, which means more efficient bass response.

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