Polk FXi A4 Bipole Surround Speakers


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Full Fidelity and High Performance

The F/XiA4’s engine is the dual Dynamic Balance® 1-inch dome tweeter design and a 5 1/4-inch Dynamic Balance driver that produces believable real-life effects at prodigious volumes. The selectable bipole/dipole function allows you to configure it to your space and 7.1 systems. The smaller cabinet enables it to fit in more places.

Key Features

  • The trapezoidal shaped cabinets aim the drivers and tweeters in opposing directions to produce a more realistically diffuse wavefront and wide, lifelike imaging of surround sound. Keyhole slots make mounting a snap.
  • With the flip of a switch, our dipole/bipole circuitry changes the soundfield from direct to indirect radiation patterns enabling you to place the surround speaker beside or behind you depending on your listening room setup.
  • Klippel motor optimization uses laser measurement technology to ensure a smooth excursion path at either end of the volume spectrum for uniform performance at both low and high volumes.
  • Polk’s proprietary, patented Dynamic Balance technology allows our engineers to design out distortion-causing driver and system resonances, so you only hear the good sounds.
  • Durable, computer-modelled, injection-moulded butyl rubber surrounds suppress unwanted cone resonances for a lifetime of reliable sound.
  • The F/XiA Cascade Tapered Crossover eliminates the comb filtering and beaming, common to multi-driver speakers, which degrades the quality of the audio and collapses the soundstage.
  • Patented Acoustic Resonance Control® (ARC) technology suppresses cabinet resonance that causes distortion to ensure clear and natural sound.
  • Computer-modelled anti-diffraction grilles enhance the good looks whilst minimising sonic interference.
  • All Polk loudspeakers are timbre-matched within their series, designed with the same components throughout, to achieve seamless speaker-to-speaker blending effects in multi-channel systems.
  • Gold-plated, professional-style 5-way binding posts offer the most secure connection options.

Qty Included: Pair
Orientation: Horizontal
Height: 12″ (30.48 cm)
Width: 11.375″ (28.89 cm)
Depth: 7.437″ (18.89 cm)
Weight: 9 lbs (4.08 kg)
Driver Enclosure Type: Acoustically Tuned Vent
Driver Complement:
(1) 5.25″ (13.34 cm) d (Round) Dynamic Balance driver with polymer composite cone and rubber surround – Mid/Woofer
(2) 1″ (2.54 cm) d (Round) Dynamic Balance silk polymer composite dome – Tweeter

Mounting Type: Keyhole Hanger
Available Orientations: Horizontal

Total Frequency Response: 50 Hz → 27,000 Hz
Nominal Impedance: 8 ohms
Lower and Upper -3dB Limits: 60 Hz → 26,000 Hz

Audio Inputs-
Speaker Inputs: (1) Pair of 5-way Binding Posts – Gold Plated

Recommended Amplifier Power Per Channe: l20 watts → 150 watts

Cabinet Warranty: 5 years
Drivers Warranty: 5 years
Original Purchaser Only: Yes


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