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 open the box, verify contents, 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.

Woofers
Tweeters
Crossovers
Marine Rated

Woofers

High Efficiency Design: The Polk Audio DXi Series speakers feature a high efficiency design; meaning better sound and more volume using less power.

Dynamic Balance Driver Technology: Dynamic Balance is a proprietary Polk Audio technology using laser imaging to determine what combination of speaker materials create the least resonance. Eliminating resonance in speakers results in a wide, smooth response and low distortion.

Klippel Optimized Components: For a driver to reproduce complex sounds accurately, the cone must move exactly the same distance and manner in both directions. The Klippel distortion analyzer, a device that uses a laser and sophisticated software to do large-scale analysis of drivers in motion, lets Polk optimize the speaker's motor structure, voice coil alignment, and suspension to yield the best possible performance.

Composite Cones: The Polk DXi 5250 system features Dynamic Balance, polymer/mica composite cone woofers. These composite cones feature tremendous stiffness-to mass ratio. Lower mass means faster transients and finer detail.

Rubber Surrounds: For a smoother response and improved durability, the woofers use rubber surrounds.

Tweeters

Soft Dome Tweeters: The 1" liquid-cooled, silk/polymer composite dome tweeters provide clear, detailed highs.

Neodymium Magnets: Each tweeter employs a light-weight neodymium magnet for better efficiency.

Mounting: The supplied mounting cups allow you to surface or flush mount the tweeters. The tweeters swivel in the flush-mount housings, allowing you to adjust them for optimum imaging.

Tweeter Mounting Dimensions:

Crossovers

Design: The outboard Butterworth crossovers are 2-way with a 4 kHz crossover point; both the high-pass and low-pass output slopes are 12 dB/octave.

Tweeter Level Switch: You can adjust the output of the tweeter to match a level appropriate to your vehicle or your system. On the end of crossover (opposite the terminals) the switch can be set to -3 dB, 0 dB, or +3 dB.

Protection Circuit: Each crossover has a built-in electronic circuit that protects the tweeter from accidental overdriving.

Crossover Connections: The crossover inputs and outputs are screw terminals. The terminals will accommodate the included wire or spade connectors up to 0.35" wide.

Mounting: There are two mounting holes in the base of each crossover; the cover must be removed to install the mounting screws.

Crossover Dimensions:

• Width: 3.085"
• Height: 1.070"
• Depth: 5.040"

Marine Rated

Marine Certified: Every DXi Series loudspeaker is designed not only to withstand the demands of a car's sun-baked climate, but corrosive marine environments too. That means subjecting them to ASTM (American Society for Testing and materials) scrutiny to ensure they are suitable for the marine environment. Each speaker endures a series of grueling accelerated weathering tests to see if it can stand up to a harsh marine environment; including hundreds of hours of salt fog, intense ultra violet light, and temperatures ranging from minus 40° C (-40° F) to +85° C (+185° F):

• Extreme Temp Test: cycles from -40°F to 185°F at 50% humidity for 48 hours
• Extreme Temp Test at High Humidity: cycles from -40°F to 185°F at 95% humidity for 24 hours
• Extreme Humidity Test: 140°F at 95% humidity for 54 hours
• Salt-Fog Materials Test: based on military specifications for ASTM D5894 and Mil-Std 883 tests; alternates one week of UV and one week of salt fog exposure for six weeks (1008 hours total)
• UV/Salt-Fog Whole Speaker Test: based on military standard Mil-Std 883 Method 1009 8 test; UV and salt fog exposure for 24 hours