We blew 4no. PD1850's |
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rosssss224
Registered User Joined: 25 July 2012 Status: Offline Points: 447 |
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Got some images - nothing obvious and no smells etc...tried a signal and nothing. Cones moves freely as it should |
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Guests
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my guess is the generator did something bad and in turn the proline did something bad -
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rosssss224
Registered User Joined: 25 July 2012 Status: Offline Points: 447 |
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Further image just for context....!
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toastyghost
The 10,000 Points Club Joined: 09 January 2007 Location: Manchester Status: Offline Points: 10920 |
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Cut the dust caps off and look at the coils. They’re buggered anyways so you might as well look at the inside.
One thing I would suggest is to make sure the subs are stacked two high two wide, or on end vertically four wide to make sure the horn mouth is large enough to help reduce excursion at the lower end of the response in future too. With FLH it’s a fine balance between excursion for cooling and excursion for thermal compression especially in smaller stacks. |
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snowflake
Old Croc Joined: 29 December 2004 Location: Bristol Status: Offline Points: 3118 |
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he looks at three different cases. the DC coupled case is the worst but all three there is significant DC current of several volts. Have you tried putting 9V battery across a driver and seen how much the cone moves? and he doesn't even try to use a particularly problematic waveform. clipping will cause driver offset which may make the coil hit the backplate or make it's cooling so inefficient it burns out.
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gen0me
Young Croc Joined: 20 February 2016 Location: UK Status: Offline Points: 999 |
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Get generator and play sin 40hz. Than play square 40hz. Compare behaviour
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BASSHORSE
Young Croc Joined: 19 September 2007 Location: wolverhampton Status: Offline Points: 1145 |
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pd cones dont give no warning,.blapps or flaps..they just go silent ,..if you are getting them reconed i would use rmj cones,,tryed & tested,,plenty stronger than the original pd in my opinion,..
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rosssss224
Registered User Joined: 25 July 2012 Status: Offline Points: 447 |
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Prices seem to good to be true. whats the catch?
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spongebob
Young Croc Joined: 20 October 2010 Status: Offline Points: 1395 |
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They're not the same driver (think T/S params, i.e. the whole reason the driver is suited for your application) as he doesn't use OEM recone kits |
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concept-10
Young Croc Joined: 17 May 2016 Status: Offline Points: 1292 |
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This
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PauliePaul
Young Croc Joined: 14 August 2009 Location: Birmingham Status: Offline Points: 1485 |
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It looks like you already have a set of RMJ reconed PD.1850’s there, this probably gives you the answer the question you initially asked of ‘why?’... (hint, they are not PD.1850’s any more).
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Dub Specialist Sound
Old Croc Joined: 15 November 2013 Location: Smethwick Status: Offline Points: 4873 |
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Ok lets put it to rest then
who favours Roy??? who favours OEM ??
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Musical Roots Reggae Vibration is Life! for music is sound...sound is vibration...vibration is energy... and energy begets life. Therein lies my passion!...MUSIC IS LIFE...
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