Polk Audio LSiM704c Center Channel Speaker

Polk Audio

Out of stock

  • Dynamic Balance
  • PowerPort Bass Venting

PowerPort technology

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.

High-quality tweeter performance

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.

Weight 13700 g
Dimensions 615 × 305 × 280 mm

Type center channel
Tweeter 1″ (25mm) enhanced Ring Radiator
Midrange 3 1/4″ super cell aerated polypropylene
Woofer 5 1/4″ super cell aerated polypropylene
Frequency Response (-3dB limits) 70 Hz – 30 kHz
Overall Frequency Response 40 Hz – 40 kHz
Steady State Recommended Amp Power 20 W – 200 W
2.83V Sensitivity 88 dB
Impedance compatible w/ 8 Ohm outputs