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Heat problems!? |
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Crazy Dane 
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Joined: 14 October 2010 Location: Denmark Status: Offline Points: 303 |
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 Topic: Heat problems!?Posted: 18 October 2010 at 4:29pm |
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I an about to build some punishers. But the dealer i am about to buy drivers from, says that there has been som reportet problems with heat in the punisher.
If i use the 12.00SW speaker in the Version 2 Punisher, will i get problems with speakers overheating? Ore was that only a problem in the Version 1? |
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Best regards... Frank
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Mircea Bartic
Old Croc 
Joined: 18 February 2005 Location: Romania Status: Offline Points: 2581 |
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Posted: 18 October 2010 at 5:17pm |
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Only the first version cabinet with the second generation drivers suffered from heat issues.
The cause was lack of ventilation to the voice coil because the second generation speaker was deeper. |
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general manager & head designer at nexus-acoustics research
http://www.facebook.com/nexus.acoustics.research Ex Nexus_3 |
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toastyghost
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Joined: 09 January 2007 Location: Manchester Status: Offline Points: 10889 |
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Posted: 18 October 2010 at 6:00pm |
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Not 100% correct - the v2 cab with current drivers still gets very hot and I've only seen one dead Punisher that wasn't due to overheating the VC. They can't take 1000w RMS all night long. |
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Crazy Dane
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Joined: 14 October 2010 Location: Denmark Status: Offline Points: 303 |
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Posted: 18 October 2010 at 6:09pm |
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That sucks :( What about if i use the Neodymium driver instead?
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Best regards... Frank
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Timebomb
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Joined: 11 October 2004 Location: Lancaster Status: Offline Points: 2706 |
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Posted: 18 October 2010 at 6:22pm |
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Neo wont make much difference, the problem is the small closed rear chamber, it gets hot over long periods of time at high power, there is no way for the heat to escape and it gets hotter and hotter and cooks the driver.
I run mine on about 700W each and ive never had a problem, the drivers can take 700W in the punisher, just dont clip the amp. |
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James Secker facebook.com/soundgearuk
James@soundgear.co.uk www.soundgear.co.uk |
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Timebomb
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Joined: 11 October 2004 Location: Lancaster Status: Offline Points: 2706 |
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Posted: 18 October 2010 at 6:24pm |
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What failed out of interest? did you get the former to hit the back plate? |
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James Secker facebook.com/soundgearuk
James@soundgear.co.uk www.soundgear.co.uk |
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abbotsmike
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Joined: 28 December 2009 Location: Hillingdon, UK Status: Offline Points: 343 |
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Posted: 18 October 2010 at 6:46pm |
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Aluminium access panel with heatpipes onto the magnet an option?
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toastyghost
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Posted: 18 October 2010 at 7:42pm |
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Ten points to that man! Last time I ever ran them below 42Hz 48dB L-R.
The access panels sit side by side - even with spacers to ensure a bit of airflow you'll find the top cabinet is a lot hotter than the others. I believe Timebomb here looked into piping the vent out to the mouth of the horn but I'm not sure why a prototype was never made. Going from 700w to 1000w+ isn't giving you a noticeable difference to my ears anyway, it's all lost in power compression because of the heat. |
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Crazy Dane
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Joined: 14 October 2010 Location: Denmark Status: Offline Points: 303 |
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Posted: 18 October 2010 at 8:02pm |
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What about a ali heatsink placed in the mouth of the horn folding?
Underneath the driver ore on the panel next to it. See link... http://peecee.dk/upload/view/271296 I'm working with CNC milling, and could make some heatsinks that maybe could absorb some heat? |
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Best regards... Frank
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vzummer
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Joined: 08 April 2010 Location: Belarus, Minsk Status: Offline Points: 21 |
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Posted: 20 October 2010 at 10:57pm |
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Crazy Dane, you're absolutely right, for example have a look at VOID sub (rear): http://www.voidaudio.com/product_detail.asp?id=76 This is how it could be:
Cast or milled aluminium (or its alloys). Could be aided (even replaced) with two side panels. Speaker access panels could be made from such heat radiator.
For best passive ventilation all fins should be vertical at this point ov view. Maybe this configuration is even better that 1st, because: 1) increased dissipation surface (two panels instead of one) 2) additional infrared (heat) radiation transfer due to radiators closely placed to magnet Anyway, who's got money and is someway fanatic can place all three of them. Sorry for kiddish sketches, don't have forces to draw precise at night =) |
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Nachural
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Joined: 15 April 2009 Location: West Midlands Status: Offline Points: 1255 |
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Posted: 21 October 2010 at 10:38am |
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Ideally the heatsink would have to be in thermal contact with the driver.
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it's all just cardboard and magnets really
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SMP
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Joined: 16 March 2013 Location: East London Status: Offline Points: 1226 |
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Posted: 19 December 2013 at 12:08am |
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I am currently considering the dynamics of this problem and may have a solution
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Mircea Bartic wrote:
