Shop to buy a SPL meter in Birmingham?

Discussion in 'Subwoofers' started by gm0x45, Mar 13, 2006.

  1. gm0x45

    gm0x45
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    Hello,

    Anybody knows a shop in B'ham where I can buy a SPL meter? I'm thinking about the analog Radioshack one and don't really want to order it on the web. Many thanks!

    Cheers.
     
  2. Jammyb

    Jammyb
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    Maplins?
    I don't know birmingham very well outside of the city center, but there's a maplin just off new street.

    Also down by richersounds and superfi there are some musicical instruments shops as well.
     
  3. gm0x45

    gm0x45
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  4. Helicon

    Helicon
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    Get an analogue one....much more accurate.
     
  5. Badger0-0

    Badger0-0
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    How so????
    That one goes down to 30Db +/- 1.5 Db and no needle to bend.
    It's a perfectly good piece of kit.
     
  6. Nimby

    Nimby
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    I believe the answer is that you can measure to the thickness of the needle on the analogue meter.
    Isn't the digital type limited to whole dBs? (Never seen a digital one in the flesh so I may be wrong about this)
     
  7. Badger0-0

    Badger0-0
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    No, nimby.
    You can read to .1 of a Db :smashin: but do you really need too????
    As I said, the spec is accurate down to 30Db, with an error rate of +/- 1.5 Db.
    Two ranges, fast and slow, A and C weighting.
    You can HOLD or keep it going for a max reading over a period of time.
    What more do you want?.
    That Tandy job is fine, IMO.
    Who needs correction factors for what is a crappy yank SPL???? :rolleyes:

    IMO, all this SPL stuff has come from the US, where it seems as though RS are the only suppliers.
    Radio Ham was the same 20-30 years ago.
    The yanks were soon overtaken by the far east in that field too.
     
  8. Nimby

    Nimby
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    Thanks. I was comparing RS analogue with RS digital meters.

    I'm afraid the RS correction factors are essential in the bass.
    I wish they weren't because otherwise I'd have a flat measured response.
    Instead of a ski jump.

    The other meter (linked to above) only claims to reach 30Hz. Whatever that means.
    But it suggests it is useless for measuring subwoofer response curves. (however crudely) Not without correction factors anyway.

    The Tandy/RS reads to below 10Hz. Not accurately of course. This is where the correction factors come in to compensate for the built-in microphone's natural bass roll-off. It was probably never intended to be accurate in the bass.

    For simple direct comparisons of level between a subwoofer and speakers for calibration purposes either meter will suffice. It is only when they are used for frequency response measurements that the RS meters show their low prices. Thye were never intended to be used as such. That they survived so long in AV circles suggests that they succeeded beyond expectations.

    The quality professional SPL meter "competitors" cost so much they are completely out of reach for most enthusiasts.
     
  9. Badger0-0

    Badger0-0
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    :smashin:
    The RS goes down to 10 Hz???
    That's good, but can anyone hear that low?.
    You're right , the RS was not intended to go down to bass level, IMO.

    I bet (and I have nothing to back this up) the maplin job, even with correction factors taken into account, is more accurate than the RS. The 1.5 Db accuracy will still apply below 30Hz, they just can't guarantee it, that's all.
    IMO, why factor in corrections, when you don't need to?
    Is 40 year old technology still better than new stuff, is what I'm asking.
    A bit of a loaded question, to my mind, but there you go :smashin:
     
  10. Badger0-0

    Badger0-0
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    Sorry, I confused my Db with Hz.
    The spec is down to 31.5 Hz +/- 1.5 Db
    There isn't much in it :smashin:

    I blame the Stella.
    It's Friday, after all :thumbsup:
     
  11. Nimby

    Nimby
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    :lesson: Er...Never mind.

    :rolleyes:

    But why Stella? :eek:

    ;)
     
  12. Badger0-0

    Badger0-0
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    Because it's a quality drink that is well established as the best.
    This ONE time, I would agree that quality is worth paying mega bucks for.
    But only Belgian mind, English sucks.

    HTH :D :smashin:
     

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