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.
Poly-Mica Cone: Each speaker features a
Poly-Mica cone. Mica adds strength and heat resistance to polypropylene,
resulting in reduced distortion and improved reliability.
Air-injected Rubber Surrounds: For a smoother response and improved durability, the woofers use air-injected
Silk Dome Tweeters: Each
speaker has a 3/4" Wide-Range Silk Dome Tweeter for smooth high
Highly Efficient Design: The SPS-406's high-efficiency
design allows the speaker to be run off of your factory or aftermarket head
unit, resulting in an easy system improvement for many vehicles requiring a 4x6" speaker.
Shallow-Design: The Alpine SPS-406 features a stamped steel
shallow frame. This shallow mounting design allows for easier installation in a
wide range of door panels giving you a perfect fit.
Mounting: The speakers can be mounted in a metric 4x6" opening, or,
using the supplied adapter rings, the speakers can be mounted in a U.S. standard
4x6" opening. The speakers also come with bottom mount spacer rings.
No Grilles: No grilles are included with this speaker.