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Granite slab on top of subwoofer ?

Discussion in 'Subwoofers' started by jonnyv, Apr 30, 2002.

  1. jonnyv

    jonnyv
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    In a previous thread i had been advised to get my subwoofer on spikes (which i have now done) and get a slab of granite on top to minimise vibration...

    My question is : Is this really neccesary, i dont listen to my home cinema at extreme levels...What effect does the slab being on top have to the bass ?

    cheers
     
  2. Jase

    Jase
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    The effect it has, in my case anyway, is to tighten the bass and reduce the boom.

    Strange but true.
     
  3. juboy

    juboy
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    I use granite slabs UNDER my hifi main speakers and that too tightens the bass and adds greater depth to the sound.

    Also has the benefit of protecting my wooden floorboards.
     
  4. eddiea

    eddiea
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    Can anybody tell me where I can buy Granite slabs in the UK please?

    regards

    eddie:cool:
     
  5. juboy

    juboy
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    Just about any Wickes, Do It All or large DIY store seem to sell them. They're pretty cheap too so it's worth a try.
     
  6. eddiea

    eddiea
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    Are you refering to cheapo paving slabs?

    When you said granite I thought you meant the smooth polished solid type.

    What I would realy like is some marble slabs to stand my Sub and speaker stands on, any Idea where marble can be bought?

    Regards

    eddie
    :cool:
     
  7. juboy

    juboy
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    Paving slabs? They'd be way too big for most speakers and aren't particularly heavy I don't think.

    Check your local DIY superstore, they should sell higher quality granite, slate and marble slabs.
     
  8. eddiea

    eddiea
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    They are not all big, small pavers are available, I've currently got a 43cm square one under my Sub.

    I've tried Wickes, Do it All and B&Q for marble or granite with no success.

    Where did you get your granite?

    regards

    eddie:cool:
     
  9. juboy

    juboy
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    I got granite slabs from Wickes in Swindon, probably around 18 months ago.
     
  10. eddiea

    eddiea
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    thankx:)
     
  11. jonnyv

    jonnyv
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    Just phone your local monumental mason...I'm having a 13" x 15" granite slab cut..could pay extra and have the sides polished !
     
  12. mandlebrot

    mandlebrot
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    How much are they charging you for the 13" x 15" granite slab?
     
  13. jonnyv

    jonnyv
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    £15 for 13" x 15".its extra to have the sides polished...

    Its damn heavy !!
     
  14. eddiea

    eddiea
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    Any idea how much extra to have the sides polished?

    Regards

    Eddie:)
     
  15. Adele

    Adele
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    Does putting slabs on/under the sub work well with ALL types of sub or with more succes for specific types (i.e side firing/downward firing)?

    Cheers,
    Adele.
     
  16. Reiner

    Reiner
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    I got granite slabs (2cm thick) under my speakers and rack since they all have spikes and would otherwise scratch my floor: squarish ones with the top and sides polished, as well the upper edges "broken" (don't know how to translate that specific term), i.e. edges are slanted and polished, too.
    The ones for the rack are made of the same raw material but round (4cm diameter), as well "broken" and polished, thus having 4 coaster-like pieces.

    All "slabs" are of the same material & color as my floor and it cost less than DEM100/EUR50 from a company which makes / sells granite and marble tiles or any form and size for that matter.
    (They also made the granite and marble floor tiles for my parents new house where my setup is currently "stored".)

    But worst thing is I have not seen them yet as they were delivered after I left Germany ... :eek:
     
  17. Jase

    Jase
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    Only tried on my sub which is forward firing but in theory it should work for any sub. It may be more effective for downfiring than forward firing or vice versa, not sure!!

    Anybody tried the two types??
     
  18. Chip

    Chip
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    Would a heavy granite slab on top of a plastic Bose sub help? :eek:

    Chip
     
  19. lmccauley

    lmccauley
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    It would improve the quality of the bass by approximately 100%, I think...
     
  20. juboy

    juboy
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    Harsh but fair.
     
  21. Guest

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    :eek: :rolleyes: :eek: :rolleyes: Do you have a scrap yard nearby?

    Big Ron Swipe
     
  22. JSW

    JSW
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    If these slabs of granite/marble are not that expensive then why not go the whole hog and have an enclosure made from them!

    That way you can choose the size shape of the enclosure, then ring the company who makes your driver and give them the cubic capacity and they will be able to give you details for port diamater and length!
     
  23. Reiner

    Reiner
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    I had a friend long time ago who claimed he build his floorstanders out of marble and filled them with sand, thus weighting "a few" kg. Unfortunately I never had a chance to see/hear them.

    But if I am not mistaken the enclosure of a speaker should never be totally solid, that's why even good speakers use MDF (the more expensive one then have a real wood veneer).
    Exceptions to the ruls exist of course, some are made of aluminum or 'plastic' (like the Tag's).

    Might be wrong though and would appreciate if any DYI fans can comment on that.
     

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