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Mobile Solutions F.A.S.T. Rings 5" x 7" Speaker Enhancer Kit (IA-FAST-5X7CA)

3pc Foam Acoustic Speaker Enhancer Kit for 5"x7" Speakers

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List price $39.99

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General Features:

  • 5"x7" F.A.S.T. ring kit
  • For Acoustically Sealing Transducer
  • Automotive-grade open cell foam
  • Pair of 3pc foam speaker rings
  • Acoustically seals speakers for better sound performance
  • Absorbs rear wave, prevents front and rear wave cancellation and reduces panels vibrations
  • Authorized Internet Dealer
  • 30 Day Manufacturer's Warranty

  • Priced Per Pair

General Installation Directions:
    Mobile Solutions Foam F.A.S.T. Rings
  1. Separate the three pieces of Foam (101, 102, 103)
  2. Clean the back panel of the door, remove the backing paper from 103 and adhere directly behind the speaker to the outermost panel in the door. This will help absorb the rear wave and reduce panel vibration. (This step is optional as it is possible to absorb moisture)
  3. With a razor blade cut circumferentially 102 down to approximately 1/4”. Remove backing paper and adhere to mounting surface of speaker. This will decouple the speaker from its substrate and prevent front and rear wave cancellation.
  4. Using standard installation procedures wire and mount speaker.
  5. Clean around the outside edge of the speaker, remove the backing paper from 101 and adhere 101 directly around the speaker. Test fit panel for fitment. If needed trim 101 circumferentially until proper fitment is achieved. It should press tightly to the door panel. This will focus all the sound into the cabin, prevent panel vibration and destructive wave interference giving you noticeably improved speaker performance and less panel resonance.

Baffle Specifications

Baffle Material
This is the material that the speaker baffle is made of. Common materials include hard plastic and foam. Hard plastic baffles offer greater protection to the rear of the speaker because the material is much more sturdy. The foam baffles are easier to install and can create a more watertight seal.
Compatible Speaker Size
These are the speaker sizes that the product is compatible with. For car speaker adapters, these are the sizes of aftermarket speakers that will fit inside the adapter.
5" x 7"
6" x 8"

Warranty and Return Policy

Parts Warranty Duration
30 days
Labor Warranty Duration
30 days
Warranty Provider

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
4 Star
3 Star
2 Star
1 Star

Average Attribution Rating

Michael B


Verified Purchase
Foam Rings

July 13, 2016

I was skeptical, so I tried my own A/B test in my mustang, and holy s**t, Big Difference! I figured, if nothing else I'd get extra protection from the elements, but I'm waaaay happier with the upgrade in sound quality. I had no idea it would be this good!

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Why did you choose this?
Sonic Electronix Store
Due to reviews and the improvement in sound quality
Christopher J on Jan 6, 2017
I need it!
Joaquin G on Sep 14, 2016

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Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Mobile Solutions F.A.S.T. Rings 5" x 7" Speaker Enhancer Kit (IA-FAST-5X7CA)