Polk Audio FXI A4 Surround Speakers 5.25″ Woofer
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Add the Polk FXi A4 surround speakers to your home theater system and enjoy dramatic rear-channel sound effects with your favorite movies. These cleverly designed speakers feature two tweeters aimed 45 degree from each other, for an ideal mix of direct and indirect sound.
Dipole/bipole operation for flexible placement
A dipole/bipole switch lets you position the FXi A4s on the rear or side walls of your home theater room you’ll get great results either way. If you place them behind your listening postion, set them to bipole mode for distinct, directional sound. Or set them to dipole mode for side placement, and they’ll create a more diffuse soundfield for convincing wraparound effects.
A high-tech approach to accurate sound
Polk carefully designed the drivers using laser testing to help identify and eliminate resonance points. The acoustically inert MDF cabinets fight internal vibrations that can compromise performance. It all adds up to enveloping surround sound that fully immerses you in the movie action.
bass-reflex (ported) design
frequency response 60-26,000 Hz (-3dB)
recommended amplifier power: 20-125 watts
two 1″ silk/polymer dome tweeters
5-1/4″ Dynamic Balance® polymer composite woofer
sensitivity 88 dB
keyhole slot for easy wall-mounting
5-way binding post terminals
voice-matched to Polk’s RTi tower and bookshelf speakers and CSi center channel speakers
11-5/16″W x 12-1/16″H x 7-13/16″D
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