Polk Audio LSiM703 Bookshelf Speaker

Polk Audio

Out of stock

  • Dynamic Balance
  • 3-Way Driver System

This product is currently out of stock and unavailable.

The Flagship of Bookshelf Speakers

The LSiM series loudspeaker is Polk Audio’s best high-performance loudspeaker. Polk Audio designed the LSiM series loudspeakers to create a sound that virtually transports you to the scene of the recorded performance.

Dynamic Balance

Dynamic Balance is a proprietary Polk Audio technology using laser imaging to determine what combination of speaker materials create the least amount of resonance. Eliminating resonance in speakers results in a wide, smooth response, & low distortion.

3-Way Driver System

The Polk Audio LSiM series bookshelf loudspeaker employs a 3-way driver system for crisp, detailed highs; natural, lifelike midrange; and accurate, dynamic midbass.

Power Port Bass Venting

To eliminate bass-stealing turbulence at the mouth of the port, Polk Audio engineers designed the PowerPort. It’s unique shape promotes “laminar” airflow even in short tube ports by mimicking the properties of longer, flared port openings. No turbulence means no wasted power, which means more efficient bass response.

SKU: N/A Category:
Weight 14900 g
Dimensions 510 × 295 × 430 mm


Black, Walnut

Driver Enclosure Type Driver Enclosure Type
Driver Complement • (1)  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
Enclosure Type Mid-High Array Enclosure Type: Sealed
Midwoofer Enclosure Type: PowerPort bass venting
Total Frequency Response 36 Hz → 40,000 Hz
Nominal Impedance 8 ohms
Lower and Upper -3dB Limits 50 Hz → 30,000 Hz
Type Orth Crossover Design
Tweeter Midrange Crossover Frequency 2800 Hz
Recommended Amplifier Power Per Channel 20 watts → 200 watts