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Polk's LC65fx makes movie soundtracks come to life all around you. These versatile, high-performance surround speakers install directly in your wall for a space-saving setup. Plus, they take advantage of the same sophisticated technologies that have made Polk's critically acclaimed LSi loudspeakers so successful. High-quality construction keeps the drivers in rigid alignment, and virtually eliminates sound-muddying resonance. Each speaker boasts two advanced tweeters that deliver smooth, extended highs with impressive detail. And Polk engineered the woofer to provide clear, precise midrange and bass.

Solid/Diffuse switch for more sound control
The LC65fx's offer more placement flexibility than conventional in-wall speakers — you can choose from two modes to get the best-sounding surround effects in your room. "Solid" mode produces clear, directional sound that lets you pinpoint the location of certain rear-channel effects within your home theater's soundstage. "Diffuse" mode spreads the sound out, giving you broader, more enveloping surround effects.

Create a hidden home theater with the LC65fx and other LC in-wall speakers, plus a CSW in-wall or in-floor subwoofer. You can also can also combine the LC65fx with LSi free-standing speakers.

Free installation help from Crutchfield
When you buy in-wall or in-ceiling speakers from Crutchfield, you'll also receive copies of our in-depth speaker and wire installation guides, free of charge:

Click the links above to view these guides; you'll need the Adobe Acrobat PDF reader (free download).

Product Highlights:

  • frequency response 45-26,000 Hz (-3dB)
  • two 3/4" Ring Radiator tweeters
  • 6-1/2" Dynamic Balance® woofer
  • handles up to 125 watts
  • sensitivity 88 dB
  • 4-ohm impedance
  • "solid" mode — directional sound, all drivers in phase (bipole)
  • "diffuse" mode — broader sound that's harder to pinpoint, one tweeter out-of-phase (dipole)
  • Power Port technology for improved bass response
  • tweeter level and wall distance switches
  • paintable grilles
  • durable, moisture-resistant construction
  • cutout: 7-1/4"W x 12-3/4"H
  • mounting depth: 3-1/2"
  • lifetime warranty

Polk Audio LC65fx Reviews

Hands-on research

What's in the box?

Download owner's manual

  • 2 In-wall 2-way speakers
  • 2 White aluminum grilles (paintable)
  • 2 Plastic paint masks
  • Cardboard template
  • Owner's Manual (English / Portuguese / German / Italian / Spanish / French)
  • On-line registration card

Features and Specs

Enclosure Type In-wall
Video Shielded No
Tweeter Ring Radiator
Midrange Size ---
Woofer Size 6.5
Woofer Composition Polypropylene
Woofer Surround Rubber
Power Range (Watts) 10-125
Sensitivity 88 dB
Impedance (Ohms) 4
Frequency Response 45-26kHz
Connector Type Spring posts
Bi-Amp Inputs No
Parts Warranty Lifetime
Labor Warranty Lifetime

Product Research

Mounting Options


Dynamic Balance Technology: 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 and low distortion.

Angled Woofer: The LC65FX is equipped with a 6-1/2" Aerated Polypropylene cone woofer. Aerating the polypropylene cone adds damping without adding weight for great sound and high efficiency.

Dual Tweeters: Each speaker has dual 3/4" Ring Radiator tweeters for crisp, transparent highs. The ultra-light woven Ring Radiator Diaphragm delivers flat response, precise detail and overall accuracy. A High Frequency Waveguide prevents phase cancellations for smooth, uniform frequency response and wide dispersion. A Low Frequency Waveguide promotes laminar airflow between chambers to prevent air turbulence. This feature serves the same function as Power Port for Polk's bass systems. The tweeters are angled 120° away from each other.

Timbre-matched: The speaker is timbre-matched to the Polk Audio LCi Series for seamless, enveloping imaging when used in a home theater system. You can mix and match any of the LCi-series in-wall and in-ceiling speakers with the LCi Series high performance floor-standing and bookshelf speakers.

Terminals: The speaker features gold-plated spring post terminals.

Wiring Recommendations: The gauge of the speaker wire used to connect this speaker depends upon the length of the run:

  • Lengths of up to 25': 18 or 16 gauge
  • Lengths between 25' to 50': 16 or 14 gauge
  • Lengths between 50' and 75': 14 or 12 gauge
  • Lengths of over 75': 12 gauge


Imaging Switch: The LC65FX offers switchable "Solid" and "Diffuse" imaging patterns to create the surround effect you desire. A "Diffuse" image is defined as one which creates a "cloud" of sound, as ambient sounds fill the environment around the listening area. A "Solid" image is one which creates a more directional, localized, pin-point sound.

Wall Distance Switch: It is recommended that the speaker be placed more than 2' from a side wall. If position limitations demand than they be installed less than 2' from a side wall, the proximity of the surface can result in a response "bump" between 50Hz and 200Hz, causing the speaker to sound "boomy." The Wall Distance switch flattens response and tunes out the "boominess" without sacrificing deep bass response.

Mounting Options

Installation: The speaker requires a rectangular cutout 7-1/4" wide and 12-3/4" with a depth of 3-1/4", assuming 1/2" drywall. Once the hole is cut, the speaker can be held in place and the Rotating Cams can be tightened, allowing you to secure the speaker to the drywall without any extra assembly. If you will not be mounting the speaker in drywall, make sure the wall or ceiling material can safely support the weight of the speaker before installation; the speaker weighs approximately 4.35 pounds.

Paintable: The grille and flange can be painted, allowing the speaker to match any décor. A clear plastic paint mask is included to protect the "unpaintable" speaker parts.

Optional Enclosures: The optional Polk Audio ENCL LC65i custom built Performance Enclosure (item # 107ENLC65i, sold individually) gives the LCi in-wall speakers the performance edge by hiding a complete, perfect-volume speaker cabinet within the wall before the wall is even completed. The LCi Performance Enclosure is specially constructed of high density MDF and fill material in a size that fits securely between wall studs in pre-drywall construction. Adjustable brackets make pre-construction installation simple. Vibration-damping foam pads ensure rattle-free performance.


Frequency Response:

  • Overall: 30 Hz-27 kHz
  • +/-3 dB Limit: 45 Hz-26 kHz

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.