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.
Cutout Diameter Correction
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.
Marine Certified: Polk/MOMO Series speakers are built to withstand exposure to moisture and UV rays, so they
work well in boats and cars.
Metalized Polypropylene Woofer
Cone: This woofer features an ultra-stiff metalized polypropylene Dynamic Balance
for massive bass. Its Dish Cone design is mechanically supported by a unique
Vented Cone Coupler. This support increases the sub's axial rigidity.
Rubber Surround: The cone uses
a durable, airtight rubber surround for a long life of
extended linear motion.
Stamped Steel Basket: The
acoustically inert stamped steel basket offers lower distortion.
NOMEX Spider: The huge, fire-retardant flat NOMEX
extended linear motion while providing highly reliable mechanical and
Klippel Measurement Technology:
State-of-the-art laser-based Klippel measurement technology
perfectly centers the subwoofer's voice coil in the magnetic field,
improving X-max and BL linearity, and the sub's micro and macro dynamics,
for deep, precise bass.
Triple Vented: The vented
coil/cone coupler, vented spider platform, and vented pole piece all allow cooling air to freely flow over the
heat-generating components and better harness all the watts your amp can
Magnet Boot: The removable rubber magnet boot provides additional damping and deeper installation flexibility.
With the magnet boot removed, the woofer has the following dimensions:
Terminals: The woofer has
professional grade nickel-plated push terminals that will accept bare wire and
- Magnet Diameter: 5.528"
- Depth as top:
- Depth as bottom: 5.843"
Recommended Sealed Box
Volume: Polk recommends using this woofer in a sealed enclosure with an
internal volume of 0.66 cu/ft.
The box incorrectly states that the woofer can handle up to 125 watts RMS and
300 watts peak. In fact, the woofer can handle up to 300 watts RMS and 600 watts
Cutout Diameter Correction: Page
7 of the manuals included with the initial production runs of this woofer lists
incorrect cutout diameter specifications; mounting holes cut using the
specifications on page 7 will be too large for the woofers. The correct cutout
specifications are listed on page 10 of the manual; on page 10, the cutout
diameter is called "Mounting diameter".