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The RM705 is the only 5.1 surround audio speaker system in Polk Audio's RM series which includes a subwoofer.

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Pros

amazing sound quality for the price. great entry-level choice.

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Very little distortion at higher volumes.

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Compact design that is sleek and modern.

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50w powered-subwoofer produces big clean bass for its size

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Includes wall-mounting brackets with a paper template for easy mounting.

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Voices in movies can be heard very clearly with no necessary tweaking--something that can be a problem with some 5.1 systems.

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Excellent sound quality that really fills a room.

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Cons

The input holes on the back of each speaker are small, don't facilitate high-gauge wiring.

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Edit

 

The RM705 is the only 5.1 surround audio speaker system in Polk Audio's RM series which includes a subwoofer. This series is designed to give the sound you'd expect from a set of big speakers, but in compact sized speakers. This bundle consists of 6 speakers to be used as a 5.1 surround sound system, including a subwoofer. The RM705 uses Polk Audio's 6-1/8" tall RM7 satellite speakers as fronts and surrounds. These speakers feature one 2-1/2" composite cone midrange and one 1/2" diameter tweeter.  The 9-7/16" wide RM7-C center speaker features two 2-1/2" composite cones and one 1/2" diameter tweeter.  The system is completed by the 12-1/2" square downward firing 50 watt sub, with 8" diameter driver. The front and surround speakers can be mounted on a flat surface or to a wall with the included hardware, or can be placed on the optional floor stands.  These speakers also feature a trapezoidal cabinet shape, which not only adds to it's unique compact look, but also reduces inner speaker standing waves and adds strength. This system can easily be expanded to 6.1 or 7.1 surround with the addition of extra satellite speakers. This system is also available as the RM75, which does not include a subwoofer.

Features:
  • Fronts / Surrounds:
  • Midrange: One 2-1/2" Diameter (6.35cm) Dynamic Balance Composite Cone
  • Tweeter: One 1/2" Diameter (1.27cm) Silk/Polymer Dome
  • Center:
  • Midrange: Two 2-1/2" Diameter (6.35cm) Dynamic Balance Composite Cone
  • Tweeter: One 1/2" Diameter (1.27cm) Silk/Polymer Dome
  • Subwoofer:
  • 8" Dynamic Balance Composite Cone
  • Downward Firing
  • Electrical 
  • Overall Frequency Response: 40Hz-22kHz
  • Lower -3dB Limit: 45Hz
  • Upper -3dB Limit: 20kHz
  • Nominal Impedance: 8 ohms
  • Recommended Amplifier Power: 20-100 w/channel
  • Efficiency: 89 dB
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