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Discontinued Product

Polk Audio LSiM Series Mahogany Center Speaker - LSIM704C

Abt Model: LSIM704C | UPC Code: 747192121150
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Product Details

Polk Audio LSiM Series Mahogany Center Speaker, Model LSIM704C (Sold As Each)

Whether you enjoy music on vinyl, CD or MP3, or movies on DVD or BluRay®, the performance of the new LSiM Series will transport you. Experience dynamic musical tonality, coherent detail, and natural low frequency reproduction, even at lifelike volume levels. Build a home theater with new LSiM Series components and experience timbre-matched sonics and immersive spatial ambiance, with realistic accuracy and linearity, even at movie theater volume levels.

Key Features:

  • Pleasing tonality, even during extended listening at performance levels.
  • Crisp, lifelike impulses, transients and coherent detail without any unnatural ringing or decay.
  • Natural reproduction of complex low frequency instruments and special effects.
  • Uniform sonic representation within the listening area and immersive spatial impression.
  • Reproduce concert/theater levels while maintaining linearity and accuracy.
  • Compatibility with a wide array of electronics both past, present and future.


  • Dynamic Sonic Engine
    A single molded enclosure within the enclosure that houses the super-accurate Ring Radiator tweeter and Extended Motion Mid-Range Driver, the Dynamic Sonic Engine improves high-frequency dispersion and horizontal off-axis response by reducing performance-robbing back wave reflections.
  • Super Cell Aerated Polypropylene Cones
    Thicker, yet even lighter, Super Cell APP delivers better transient response and incredible detail.
  • Internally Braced Enclosures
    Solid MDF, braced with interior enclosures-within-enclosures featuring non-parallel surfaces, breaks up resonances and internal standing waves. The LSiM707 has five separate internal chambers.
  • PowerPort® Bass Venting
    A patented innovation that eliminates turbulence at the mouth of the bass port, increasing efficiency and enhancing deep, distortion-free bass.


Driver Complement

  • Mid/Woofer
    • 2 - 5 1/4" Diameter (13.34cm)
    • Dynamic Balance driver with Super Cell Aerated Polypropylene cone
  • Midrange
    • 1 - 3 1/4" Diameter (8.26cm)
    • Dynamic Balance driver with Super Cell Aerated Polypropylene cone
  • Tweeter
    • 1 - 1" Diameter (2.54cm)
    • Dynamic Balance Enhanced Ring Radiator Tweeter


  • Overall Frequency Response: 40Hz-40kHz
  • Lower -3dB Limit: 70Hz dB
  • Upper -3dB Limit: 30kHZ dB
  • Nominal Impedance: Compatible with 8 Ohm outputs ohms
  • Recommended Amplifier Power: 20-200 w/channel
  • Efficiency: 88 dB
  • Crossover: Orth Crossover
  • Crossover (mid-high array): 2500Hz
  • Crossover (subwoofer): 280Hz (midrange/midbass)
  • Inputs: Dual Gold-Plated Binding Posts

Mounting Options

  • Speaker Stands
  • Shelf Mount

Enclosure Type

  • Dual PowerPort Bass venting (subwoofer enclosure)

Approximate Dimensions:

  • Height: 7–3/4"
  • Width: 21–3/16"
  • Depth: 9–3/8"

Approximate Weight:

  • Unit: 27.80 lbs.
  • Shipping: 29.10 lbs.

Warranty Information:

  • Manufacturer's Warranty (authorized online retailer): 5 Years parts and labor
Key Features
Sold As Each/ Ring Radiator Tweeter/ Extended Motion Mid-Range Driver/ Dynamic Sonic Engine Improves High-Frequency Dispersion/ Super Cell Aerated Polypropylene Cones/ PowerPort Bass Venting/ 40Hz-40kHz Overall Frequency Response/ Mahogany Finish
More reasons to buy the Polk Audio LSIM704C from Abt Electronics
  • is an authorized dealer (Learn More).
  • The Polk Audio LSIM704C is Brand New.
  • The Polk Audio LSIM704C Ships in a Factory Sealed Box.
  • Abt ships this product for free!
ConnectivityBinding Posts
Frequency Response40Hz - 40kHz
Enclosure MaterialMDF
Enclosure TypeBass Reflex (Ported)
Impedance8 Ohms
Magnetic ShieldingNo
Midrange Size (inches)3.25
Power20W - 200W
Speaker Design3-Way
Speaker TypeCenter Channel
Tweeter Size (inches)1
Woofer Size (inches)5.25
Height (inches)7.75
Width (inches)21.19
Depth (inches)9.38


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