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Optimus 12" Foam Speaker Repair Kit FSK-12A (PAIR)

Part Number:RSO-FSK-12A
Optimus 12" Foam Speaker Repair Kit FSK-12A (PAIR)
Optimus Speaker Repair Kit # FSK-12A
Optimus 12" Foam Speaker Repair Kit FSK-12A (PAIR)
Your Price:$24.95
List Price:$34.95
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Optimus 12" Speaker Foam Repair New-Edge-It ® Kit, Part # FSK-12A

Optimus Speaker Foam Edge Repair Kit
Outer diameter:
11-3/4" (298mm)
Roll outer diameter:
10-5/8" (270mm)
Cone diameter:
9-1/4" (235mm)
Inner diameter:
8-5/8" (219mm)
Foam roll width:
3/4" (19mm)
Variances up to 1/8" (3mm) from your speaker measurements are OK.
  • Optimus 12" angle attach woofer foam repair kit. New-Edge-It ® part # FSK-12A
  • Original Optimus woofer design
  • Some models require trimming OD of new surround prior to install
  • Fits 12" frame models with 9-1/4" cone
  • Fits Optimus and Radio Shack cabinet and driver models:

    Optimus and Radio Shack 3034, 3037, 3039, 40-1019, 40-1025, 40-1026, 40-1029, 40-1042 40-1121 40-1122, 40-3025, 40-4050, 40-4051, Nova 8b, Optimus 1035, Optimus 400, Optimus 50, Optimus 800, Optimus 900, Optimus 950, Optimus Pro SW-12, Optimus Pro SW12, Optimus SW-14, Optimus SW14, Optimus T-1200, T1200, STS-1000, STS1000, T-1200, T1200, and many more!

    Please check the model and size of your speakers before ordering to be sure you receive the correct foam edge repair kit.

  • Speaker New-Edge-It ® foam repair kits include:
  • Two new formula polyether foam rubber surrounds. These last much longer than the original foam.
  • Special CLEAR speaker repair adhesive part # MI-3035. The same adhesive we use for our repairs.
  • We do NOT use generic glue or Elmers type white glue like others sell.
  • Easy to follow illustrated instructions. Installation average time is 30 minutes per speaker.
  • You do not need to remove the dust caps to install these kits perfectly - every time.
  • See online installation instructions here: Speaker Refoam Instructions
  • FREE technical support. FREE shipping to any USA address.
  • Join over 150,000 customers that have used our New-Edge-It ® speaker foam repair kits successfully!
5 Stars
Yes I got my speaker repaired and the video and kit made it a simple task. Thank you so much for offering this kit along with the information that gave me the confidence to do it myself.
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Reviewed by:  from Childress. on 8/21/2016
5 Stars
Awesome Foam Repair
I had two 12-inch woofers that I was ready to throw out, they were actually in the trash can when I came across this foam repair kit. It was a good price so I thought I would try it. Sure glad I did, it was very easy and practically restored my woofers to new condition. Instructions were very clear, just make sure to keep pressing on the glue over and over until it sticks fast; when it is liquid, it doesn't have the sticky power like as it dries, then it sticks the foam down strong. I recommend it to restore old speakers.
Did you find this helpful?  1 of 1 Found Helpful
Reviewed by:  from Rancho Cucamonga. on 8/31/2016
4 Stars
Optimus 12" woofer surround
The voice coil did not line up as well as a set of D5 Cerwin Vegas that I rebuilt. I had to resort to using a shim to get this one right. Optimus is not a precision frame so I was not surprised. I am pleased with the results.
Did you find this helpful?  1 of 1 Found Helpful
Reviewed by:  from Utah. on 10/23/2016
5 Stars
kit was great. great direction. speakers sound great.
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Reviewed by:  from lake v illa il. on 11/2/2016
5 Stars
The replacement speaker foam came with very clear instructions and plenty of material, foam and glue, to get the job done. Speakers sound great again. Wish I would have found this earlier. I will definitely use again if needed for other speakers.
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Reviewed by:  from Dayton. on 12/5/2016
5 Stars
The 12” woofers and my old speakers sound like new. The old foam was completely separated on the full circumference on both. Following the instructions restored everything. One tip not in the instructions is to press the foam to the cone between fingers or a blunt tool from both front and back of the frame. I worked my way around several times every several minutes until the glue cured enough to keep the seal tight, and then once or twice more to squeeze the almost dry glue joint really flat.
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Reviewed by:  from Pittsburgh, PA. on 1/6/2018
5 Stars
Perfect fit. And the online installation video was so helpful. I'm thrilled to once again enjoy the rich sound of speakers that I bought 30 years ago. Thanks Simply Speakers!!
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Reviewed by:  from Peterborough. on 2/12/2018
4 Stars
I installed these about a month ago. Cleaning the old foam off the cone and rim is the biggest part of the job. Take your time and be careful not to scratch the cone surface. I'll give it 5 stars if they last as long as the originals.
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Reviewed by:  from Channelview. on 8/11/2018
5 Stars
The fitment was perfect for two Optimus SW-12 woofers re-foamed.
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Reviewed by:  from Nebraska. on 12/10/2018
5 Stars
Happily Retired
This Foam edge Speaker Repair Kit is working just fine on my Radio Shack Optimus 50 12" Woofers. It put new life in these fine old speakers, they sound like new again!
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Reviewed by:  from Wisconsin. on 4/14/2019



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