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Focal - Speaker Acoustic Seal Kit

By Focal

Free shipping!
35 years in business
Australia wide install network

Enhances the sound quality of any automotive loudspeaker installation by creating an Acoustic Barrier behind and around the speakers.


The purpose of this kit is to isolate the back-wave of each speaker from the front wave of the speaker, The sound from the back of a speaker is the exact opposite to the sound from the front If the front and rear sounds meet cancellation will take place and sound quality will decline noticeably.

  • Mark and drill the speaker mounting holes. NOTE: Make sure you do not use the speaker as a template while you are drilling. Metal filings from the drill will be attracted to the speaker magnets and cause problems as they work their way inside the speaker. Remove all drill swarf and filings with a vacuum cleaner or moist kitchen towel These metal particles will eventually rust inside the door or get into the speakers.
  • With a pencil or felt pen mark a small line radiating away from each of the drilled holes. The purpose will be evident when you go to tighten the speaker with the lnstalPro seals in place, it will make it easier to locate the holes.
  • Clean down the outer door skin behind the speaker with methylated spirits or wax and grease remover. Pass the 20cm x 20cm ‘egg-crate’ pad through the speaker hole, peel off the backing paper and secure it to the outer door skin directly behind the loudspeaker. If you want a superb job of soundproofing we recommend lining the outer and inner door skins with Focal BAM, a sound-absorbing butyl rubber sheeting. This will do three things: absorb sound, stop panel resonance and create a barrier to sound escaping through assorted small gaps in the inner door skin. The egg-crate pad will absorb a large proportion of the speaker back-wave, the area directly behind the speaker is where the greatest effect can be had. If you already have BAM or similar lining your doors, this pad will adhere to it.
  • Choose the correct seal ring for the speaker and stick it to the door skin. Screw the speaker in place, compressing the seal ring. That will make a perfect seal so that sound does not escape around the speaker frame, a common problem because car doors are not always perfectly flat surfaces.
  • Adhere the 25mm x 200mm thick foam ring around the speaker, When you restore the plastic door trim this will direct the sound through the grille in the door trim and stop sound from spilling sideways into the cavity between the speaker cone and the door trim.
Other Details
  • Refund & Returns Policy

    GL Pro Sound prides itself on supplying high quality goods and the highest levels of customer service. We are happy to serve you at the highest level, especially in the case of an issue with the goods you have purchased. Please email us at within the warranty period so that we can address any problems, faults or issues.

    In accordance with ACCC guidelines, we will endeavour to fix any problem, fault or issue with a good or service provided by us, within a reasonable timeframe, provided you retain your proof of purchase, have not abused or tampered with the product or service in question, or have not simply changed your mind or found it cheaper elsewhere. Also, you are not covered in the case that the issue, problem or defect was explained to you upon sale or delivery of the goods/services.

    In the event that the product is not repairable, we will replace the product.

    In the event that the product cannot be replaced, or an acceptable replacement cannot be agreed upon, you are entitled to a refund, or an applicable store credit if you would prefer.

    All postage and insurance costs are to be paid by the buyer. We recommend that you return the product via Registered post and that you prepay all postage.

    You assume any risk of lost, theft or damaged goods during transit; therefore we advise you take out shipment registration of insurance with your postal carrier. GL Pro Sound will not be responsible for parcels lost or damaged in transit if you choose not to insure.

    The ACCC regulations and guidelines on the above, as well as a link to the Australian Consumer Law Consumer Guarantees can be found here:

    If you have any enquiries regarding this document and/or the payment services offered by us through Shopify Payments, please email us at


    Shipping Policy

    Gl Pro Sound will ship in stock goods within 48hrs some goods may be subject to be shipped within 14 days of receiving the order. All orders are shipped via Sendle. If goods cannot be processed a full refund will be offered. Shipping rates are $15 Aud flat rate 20kg and under. Over 20kgs will be calculated at checkout. If you have any queries please email

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