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Getting the U2 effect - Rattle and Hum !

Discussion in 'Subwoofers' started by Ianch, Mar 24, 2005.

  1. Ianch

    Ianch
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    Equipment

    Sony STR-DB930 - Receiver
    Sony DVP-S735D
    Mission 70 5.1 speaker system with Mission70ASE Sub

    Problem

    I seem to be getting lots of 'rattle' from the sub rather than solid bass when the action 'hots up'.

    The sub is connected directly to the amp via a single RCA stlye jack which is then connected to the low level R & L input on the sub via a 'Y' connector.

    Any suggestions how to avoid this rattle or is it a 'feature' I'll have to learn to live with ?
     
  2. Ian J

    Ian J
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    Can you describe exactly what you mean by "rattle". Is there something physically in the sub or in the room that is rattling ?
     
  3. Ianch

    Ianch
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    the rattle is definately coming from the sub - rather than get a good clean bass tone there's a distinctive low level rattle.
     
  4. pragmatic

    pragmatic
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    Try the sub in different parts of the room, do you have it on spikes, whats the flooring like?
     
  5. Ianch

    Ianch
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    it's on a solid concrete floor and has spikes !
     
  6. pragmatic

    pragmatic
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    Is it in a corner? As that could make it boom, not sure about rattle though, maybe you have a defective unit, but moving it around the rooma nd maybe tring a different interconnector may work. Also you usualy only need to connect the amp to the left channel no need for the y cable unless it says so in the manual.
     
  7. dvdsubtitles

    dvdsubtitles
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    That doesnt sound right. I thought spikes were only for putting on carpet. I'm sure subs are supposed to come with rubber feet for wooden or hard floors?

    I can imagine a sub on a concrete floor with spikes rattling.

    Mat
     
  8. Ian J

    Ian J
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    A heavy sub on properly adjusted spikes shouldn't rattle so it sounds as if it may be faulty if something is loose. Is the rattle something new or has it always been there ?
     
  9. Ianch

    Ianch
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    had the rattle for a month or two now - will try the suggestion of changing the interconnect and see how I get on.

    Thanks for all the posts so far - this is probably the most useful/helpful forum I've ever joined.
     
  10. eviljohn2

    eviljohn2
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    The obvious thing to me is make sure that all of the screws/spikes on the cabinet are tightened up. This should include those around the driver, the amplifier module and making sure the spikes havn't worked themselves loose. You may need a Torx screwdriver bit to do this though. :)
     
  11. Nimby

    Nimby
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    If it only happens when "the going gets hot" it may be the cone hitting the end stops. If it doesn't stop it could be the end of your sub. :blush:

    Nimby
     
  12. bob1

    bob1
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    Is it a rattle or more like scratching type nosie ,either the driver as add it or something as come loose ,have a look at the screws holding the driver in place.(ooops been said).
     

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