Polk Audio FXi A4 High performance surround speaker

(No reviews yet) Write a Review
  • Polk Audio FXi A4 High performance surround speaker
  • Polk Audio FXi A4 High performance surround speaker
  • Polk Audio FXi A4 High performance surround speaker
  • Polk Audio FXi A4 High performance surround speaker

Performance Surround Sound

FXi A4 is a close relative to the larger FXi A6. Like its big brother, it keeps the dual tweeter design and selectable bipole/dipole configurations. It's a little smaller so it will fit in more places the FXi A6 does not, but still fully matched to the RTiA series speakers.

RTi Series Features

Curved Cabinet Styling

The cabinets are specially made for both great looks and sound. The real wood finish is available in black or cherry, matching your furniture and room décor. A curved, teardrop, asymmetric shape adds strength as it avoids the typical "box" look of many other home loudspeakers.

Dynamic Balance and Klippel Optimization

Like all high quality Polk speakers, the silk dome tweeters and bicarbonate drivers in all RTi A series speakers are both Dynamic Balance and Klippel Optimized. Klippel Optimization ensures the speaker will perform well at both low and high volumes levels.

Dynamic Balance allows us to see the operation of the components on a microscopic level using lasers to reduce or eliminate artifacts that color the sound.

So what do all these features do? When added up, they bring you a gorgeous looking speaker that sounds spectacular everyone in your household will enjoy.

Real Wood Finish

RTi A speakers have Damped Asymmetric Hex Laminate Isolation (DAHLI) cabinet design for clean, accurate sound. The asymmetric design is made from a 6-layer laminate with 5 viscous layers to create the optimal shear damping (OSD) system and one real wood top layer for a beautiful finish.

The process was specifically developed for Polk. Their elegant styling aside, creating curved cabinets not only results in a stronger, more rigid and acoustically inert enclosure, but the curved walls also produce less audible coloration from panel resonances.

Premium Connections

High-quality, Gold plated 5-way Binding Post Inputs ensure snug connections every time. Tower and bookshelf models feature bi-wire and bi-amplification capability. We don't use cheap spring clips or plastic terminals with RTi A series speakers!

Mix and Match

RTi A series you can piece together your matching set, whether it's a basic 2 channel system to a full blown 7.1 configuration. Choose your own components, work with your dealer, or pick one of our prepackaged systems. Best of all, if you want in-wall or in-ceiling surround speakers, our TCi in-wall and in-ceiling series are voice matched to give you the best of both worlds for a really slick installation!

Patented* Bass Porting Techniques

Nothing is more annoying then dialogue that sounds chesty or boomy- the result of cabinet resonance. RTi A Series Speakers feature either PowerPort Plus, PowerPort or ARC Porting to reduce or elimate this noise.

Bass venting for superior clean, low distortion bass that you can really feel. PowerPort vastly reduces "chuffing" or "port noise" and provides deeper, more powerful, lower distortion bass than could be realized with conventional ported or sealed designs of comparable size.

PowerPort® Plus+
An enhancement in Power Port technology. Power Port Plus uses two ports (one front, one rear) and internal "plates" to further reduce air turbulence and increase bass efficiency. PPP allows even lower frequency tuning and lower turbulence for less noise and distortion, and more big musical bass, even at lifelike volume levels. This technology delivers performance that vastly exceeds conventionally ported speakers with bass that you truly feel, as well as hear.

ARC (Acoustic Resonance Control) Port
This technology suppress internal cabinet resonance to ensure clear, non-muddy midrange resulting in a more natural sound.



FXi A4

FXi A6

Driver Complements

Mid/Woofer 1 - 5-1/4" Diameter (13.34cm)
Polymer Composite Dynamic Balance with rubber surround
1 - 6-1/2" Diameter (16.51cm)
Polymer Composite Dynamic Balance with rubber surround
Tweeter 2 - 1" Diameter (2.54cm)
Silk Polymer Composite Dome
2 - 1" Diameter (2.54cm)
Silk Polymer Composite Dome


Overall Frequency Response 50Hz-27kHz 45Hz-27kHz
Lower -3dB Limit 60Hz dB 55Hz dB
Upper -3dB Limit 26kHz dB 26kHz dB
Nominal Impedance 8 ohms 8 ohms
Recommended Amplifier Power 20-125 w/channel 20-150 w/channel
Efficiency 88 dB 88 dB
Inputs 5-way binding posts 5-way binding posts


Cabinet Size 12" H x 11-3/8" W x 7-7/16" D
(30.48cm H x 28.89cm W x 18.89cm D)
14-3/4" H x 13-3/8" W x 8-5/8" D
(37.47cm H x 33.97cm W x 21.91cm D)
Mounting Options Integrated Keyhole Slot for wall mounting Integrated Keyhole Slot for wall mounting
Enclosure Type Vented Vented


Product Weight 9.00 lbs. (4.08kgs) 13.00 lbs. (5.90kgs)
Shipping unit: Pair Pair
Total Shipping Weight 25.00 lbs. (11.34kgs) 31.00 lbs. (14.06kgs)
Speaker Warranty 5 years parts and labor (original purchaser) 5 years parts and labor (original purchaser)