#11
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Quote:
This applies to any dynamic driver mounted on a baffle. Most often, mis-tightening that causes buzzing is atttributable to one of 2 causes: 1) uneven tightening of the driver frame or faceplate can cause the voice coil to rub typically at frequency/excursion extremes - on some drivers the amount of difference in torque is tiny and the order in which you apply pressure (see Dan's post above) can exacerbate the issue, and 2) an air leak caused by uneven tightening. |
#12
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Good bits of information here...
The 1/2 turn past initial impact with the spring lock washer is exactly what I ended up using as a guideline and setting all screws at, great to hear this is PMC's official reco. Metaphacts, interesting information however could you elaborate on your point 1? Would the voice coil rub occur due to the driver not being situated in a perfectly horizontal fashion? |
#13
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Quote:
The best solution is to follow precisely the manufacturer's recommendation. |
#14
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Thanks for the clarification, makes sense.
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#15
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But, but, but...screws work loose over time! I mean we are talking about screws holding in something that is constantly vibrating when in use. It's just plain gonna happen.
The good news for me is, apparently I didn't do any harm. I hear zero ill effects from my tampering. And as I stated, they do sound better to me (but that could be my imagination). : )
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C.A.P.S Music Server -> Wyred4Sound DAC2dsd SE -> Wyred4Sound ST1000 mkii -> PMC IB2s |
#16
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Just for your info I have done the same on Dynaudio and Sonus Faber speakers too and hear the same effects where bass gets tighter and mids clearer too. However, do it at your own risk and I will suggest to tighten it evenly across screws. Cheers! Last edited by larevoj; 04-17-2012 at 09:08 PM. |
#17
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Proper screw torque in any material is 1/4 turn before it strips.
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