Polk Audio DB691


6×9-inch coaxial 3-way mobile/marine loudspeaker

Incredible Sound, Affordable Price

That rear deck is aching for thunderous loudspeakers like the db691 6×9-inch 3-way loudspeakers, featuring both a 25mm liquid-cooled dome tweeter, a 19mm super tweeter and plenty of Polk technology that makes db Series mobile audio loudspeakers a great choice.

db691 Features:

Dynamic Balance® driver technology for pure, distortion free sound.

Neodymium is a rare earth material we use in virtually all db driver magnets. These magnets are about 1/10 the weight of a comparable ceramic magnet and much more powerful. The smaller magnet also helps keep the db691 compact, so it fits easily into more applications.

Composite cones feature excellent stiffness-to mass ratio. The cone’s low mass produces fast transients and good detail.

Klippel optimized components for consistent, distortion-free sound.

Marine Certified means the db6911 is built tough to withstand the harshest environments on the water.

Wheel-inspired style combines with rugged durability in the db grille.

All Polk 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 loudspeakers are built to perform for a lifetime.


Driver Complement

Quantity 2
Diameter 1″ (2.54cm)
Type Silk/polymer composite dome
Mid / Woofer
Oval Height 6″ (15.24cm)
Oval Width 9″ (22.86cm)
Quantity 1
Diameter 6″ (15.24cm)
Type Dynamic Balance driver with poly composite cone


Total Frequency Response 35Hz-22kHz
Nominal Impedance 4 ohms
Efficiency 93 dB
Power Handling
Continuous 125 watts
Peak 300 watts


Oval Cut-Out Height 5 13/16″ (14.76cm)
Oval Cut-Out Width 8 5/16″ (21.11cm)
Height 1 1/4″ (3.17cm)
Full-Range Mounting Depth
Top Mount 3 3/16″ (8.10cm)
Bottom Mount 3 3/4″ (9.53cm)


Unit of Measure pair


Speaker Warranty 1 year parts and labor (original purchaser)

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.


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