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.
Woofer Cone: This woofer features an
ultra-stiff metalized polypropylene Dynamic Balance cone for massive bass. Its
Dish Cone design is mechanically supported by a unique Vented Cone Coupler. This
support increases the sub's axial rigidity.
The cone uses a durable, airtight rubber surround for a long life of extended
Stamped Steel Basket:
The acoustically inert stamped steel basket offers lower distortion.
The huge, fire-retardant flat NOMEX spider allows extended linear motion while
providing highly reliable mechanical and thermal stability.
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.
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 dish out.
Rubber Magnet Boot:
The removable rubber magnet boot provides additional damping and deeper
installation flexibility. With the magnet boot removed, the woofer has the
The woofer has professional grade nickel-plated push terminals that will accept
bare wire and pin connectors.
- Magnet Diameter:
- Depth as top: 3.972"
- Depth as bottom:
Recommended Sealed Box
Volume: Polk recommends using this woofer in a sealed enclosure with an
internal volume of 0.35 cu/ft.
The box incorrectly states that the woofer can handle up to 100 watts RMS and
200 watts peak. In fact, the woofer can handle up to 200 watts RMS and 400 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".
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.