This product is a vintage Polk model and is not available for sale, but it may still be available in some stores as a closeout or used product. The following text is taken from the original sales brochure for this product and does not reflect current availability. If you happen to have any question or concerns about this product, or any other Polk Audio product, feel free to contact our Customer Service Department at 1-800-377-7655 Monday - Friday, 9am - 5:30pm EST


8 inch powered subwoofer.

Available Finishes:
Additional Images

Room-Filling Bass from a Compact Subwoofer

Smaller room? Smaller speaker system? Gaming or movie theater lacking thrills and effects? The compact, high power DSWPRO400 goes practically anywhere, even inside of audio furniture or rack systems, takes up less than a cubic foot of room real estate, and delivers a superior small-sub experience. Smooth blending with any system, big bass effects and deep low frequency dynamics, all benefit from resonance-free Dynamic Balance® tuning and heavy duty build quality.

DSWPRO400 Features:

DSWPRO Series enclosures are designed and engineered for perfect volume, minutely tuned for distortion-free low frequencies, and internally braced and damped to eliminate internal standing waves and other performance-robbing resonances.

Polk Audio intelligent amplifiers require less power to sound great, use power more efficiently, offer bullet-proof reliability, minimal heat generation and even know when to stand down (especially at low volumes or in “Standby” mode).

Feed forward distortion suppression technology enables us to set our performance limits much higher than normal, much closer to the actual (theoretical) maximum output of the subwoofer, with no risk of excessive distortion or damage.

With the DSWPRO Series, you can choose one of four preset "room optimizers" from the remote controller, and Polk's exclusive PRO™ technology programs in the optimal bass and blending setting for your room.

Our state-of-the-art Klippel distortion analyzer makes it possible to optimize the woofer’s motor structure, voice coil alignment and suspension for smooth, unimpeded movement over a broad spectrum of the lower frequencies and ensures the best, most efficient performance even at extreme listening levels.

DSWPRO Series subwoofers feature Dynamic Balance® materials and construction elements that help them perform effortlessly in high stress, big bass situations when you need them most.

Composite polypropylene cones create greater efficiency and more cone control, while durable rubber surrounds provide superior damping, free range of motion, and don't rot like cheap foam surrounds.

DSWPRO subwoofers can be arranged with their feet forward or down, for standard downward-firing position or innovative front-firing mode (you can snap on the grille and it looks smart), allowing you to place the subwoofer just about anywhere, even inside audio furniture or a rack system.

The unique slot-loaded port design of the DSWPRO Series adds significantly more port surface area, for deeper, smoother bass response even in a smaller cabinet size; special tuning eliminates unwanted chuffing and air turbulence at the mouth of the slot-loaded port, for distortion-free bass.

You'll never have to leave your seat while you adjust your subwoofer to its optimum performance level, because at your fingertips you have feedback from the blue status LED, four-way phase selection for easy blending with your main speakers and full control of the Polk Room Optimizer (PRO).

LFE, line level inputs and outputs and 5-way binding posts for speaker level inputs afford easy connection to any system.

Your DSWPRO Series subwoofer has the colossal power to wake the house and all your neighbors, so a "Night Mode" setting, toggled from the remote control, temporarily lowers the sub's intensity.

DSWPRO Series subwoofers blend perfectly with systems composed of other Polk Audio loudspeakers; build the system of your dreams, then add the perfectly blended, deep musical low end that takes it over the top!

Use adjustable rubber feet for hard surface flooring, and adjustable carpet spikes for carpet, both options give you more placement flexibility and a totally dependable, more efficiently stable setup.

All Polk Audio products are made using the best materials and the most advanced manufacturing techniques. They pass the industry’s most exhaustive quality tests, including drop testing, extreme signal response and UV & salt exposure testing. Polk Audio loudspeakers are built to perform for a lifetime.

Driver Complement

Diameter8" (20.32cm) 
TypeDownward Firing Slot Port 


Total Frequency Response25Hz-160Hz 
Upper -3dB Limit125Hz kHz
Lower -3dB Limit30 Hz
InputsLFE, Line In, Speaker Level In 
OutputsLine Out, Speaker Level Out 

Amplifier Specs

Power Requirements (voltage)120 or 220 V Capable 
220V AvailabilityYes 
Continuous Average Output
Amplifier TypeSubwoofer 
Dynamic Power360 watts


Cabinet Dimensions
Height14 5/8" (37.15cm) 
Width13 3/4" (34.92cm) 
Depth13 3/4" (34.92cm) 
Product Weight (each)30.00 pounds


Unit of Measure35.00 
Included AccessoriesRemote Control 
Recommended AccessoriesGrille for cabinet mounting (available soon) 


Speaker Warranty5 years parts and labor (original purchaser) 
Subwoofer Amplifier Warranty3 years 

Specifications, dimensions and features subject to change without notice. For more information call us at 1-800-377-7655 (USA and Canada). Outside of North America call +1 (410) 358-3600.

DSW PRO 400 Media

DSWPRO400 Accessories