- 6-1/2" 2-Way
- 5-1/4" 2-Way
MM Series Speakers
Component Systems
- 6" x 9" (3-Way)
- 5" x 7"
- 4" x 6" (2-Way Plate)
Coaxial Speakers - Oval
- 6-1/2" 2-Way
- 6-1/2"
Ultra Marine Speakers
MM691
High performance Car speaker
6" W x 9" L
$219.95 per pair
Customer Rating:
5.00 (from 1 users)
Want more performance but don't want to go the component route? Choose the MM691 3-way. You get a woofer and tweeter, plus a dedicated midrange driver for the absolutely crucial mid-frequencies. That extra mid-range energy can create more uniform sound overall. The MM691 has the all MM goodies, which makes it a real standout in virtually any install.
- Dynamic Balance® Driver Technology for pure, distortion free sound.
- Neodymium is a rare earth material we use in all MM driver magnets, excluding 461p,) that are about 1/10 the weight of a comparable ceramic magnet and much more powerful. The smaller magnet means the MM691 fits easily into more applications.
- Carbon Composite Basket based on the spokes of a wheel is lightweight, absolutely will not flex during peaks and looks great.
- Woven Glass Composite Cones feature tremendous stiffness-to mass ratio. Lower mass means faster transients and finer detail.
- Klippel Optimized Components for consistent, distortion-free sound.
- Marine Certified means the MM691 is built tough to withstand the harshest environments on the water.
- Large-Diameter Voice Coil (38mm) in driver increases reliability and power handling.
- Wheel-inspired style combines with rugged durability in the MM grille.
MM Series Features
Unlike stamped steel designs found at the same price, Polk's MM Series carbon composite baskets are dramatically more rigid and robust, which results in lower distortion and countless years of reliability.
Carbon Composite Basket
Based on the spokes of a wheel, the MM Series basket is lightweight, will not flex during peaks and looks great! Don’t be afraid to show off the back of your speaker.
Proven high-performance features. And we can prove it.
Less Power, More Output
High Efficiency Design means less amplifier power is needed for more audio output. While a separate amp is recommended on full range models for the ultimate in performance, MM Loudspeakers will sound wonderful when driven by aftermarket head units or factory installed electronics.
Slim & Light Weight
When you first pick up a MM series speaker, you may wonder why it's so light or why the magnet is so small. The answer: advanced technology. First the MM Series uses a Neodymium Magnet Structure This premium material allows us to replace the traditional bulky ceramic magnet with one more compact and much lighter. The benefit is a physically slimmer speaker, which means it can fit into more applications. In addition, we can increase the venting of the speaker to keep it cool when playing at high volumes.
Legendary Polk sound. Legendary Polk reliability.
Polymer woofer cones and Butyl rubber surrounds provide superb reliability in the harsh confines of automotive environments for year after year of great Polk performance. All models feature oversized voice coils and Polyimide/fiberglass formers for reliability and greater power handling: 30mm for the 61/2" and 5x7 speakers; 38mm for the 6x9 and 25mm for the 5 1/4" drivers. In addition to being extremely rigid, our carbon composite basket designs enabled us to increase speaker venting to keep things cool, even when you crank it way up.
Klippel Optimized Components
In order for a driver to reproduce complex sounds accurately, the voice coil and cone must move exactly the same distance and manner in both directions of travel. The Klippel Distortion Analyzer--a device that uses a laser and sophisticated software to do large-scale analysis of drivers in motion, enables us to optimize the motor structure, voice coil alignment and suspension to yield the best possible performance.
