posted
i have my two Shocker2 15's running @ .5 ohm on my Am. Bass D 1000... and i know that to maximize power on my amp, keep the coils cool, b/c when they heat up the impedence of the coils rise...
anyone know a general rule of thumb for this? my amp cuts in and out VERY INFREQUENTLY in the beginning when i turn my car on, but after a while i can bang on it for ever and no problems
help is cool... thx... btw: my subs are sealed so i dont have to worry about the impedence spike from that... peash baby!
-------------------- kids and a wife, priorities have changed a bit still jobless!
Posts: 2502 | From: Gardiner Maine 00420ville | Registered: May 2000
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posted
I'm guessing the only way the number of turns can change is by the coil expanding as it warms. Heat causes metal to expand, yeah?...they'd have to expand right out of the magnetic gap, wouldn't they?
They would have to expand a considerable amount to make the coils change value noticeably, how much could it possibly affect them? 5%? 10% at the most? All we need to know is how much the value of the coils changes...
Assuming the subs are dual 2 ohm dvcs wired in parallel to give 0.5 ohms, a 10% rise in each coils impedance would show the amp 0.55 ohms, and no-ones gonna notice a difference in power with a change of .05 ohms.
As far as SPL goes don't you have to double or triple power to get a difference that you could actually hear? Going on this basis, the coils would have to double their value to notice any kind of difference from the amp.
However some people like to put bags of ice on their subs while in the lanes, and if this is the reason why, there may be benefit to putting a cooling system of some kind in. All we need to know is how much the value of the coils changes...
I've wondered about a permanent cooling system like this a few times and never come up with an answer.
Bazooka do water-cooled subs and amps though... if you like that sort of thing
posted
the main reason i ask is b/c my amp is 1 ohm stable, and i am dumpin two dual 2's in parallel on it... .5 ohms the box is sealed so i dont see how the impedence could fluxuate as much as in a ported box.
my amp has toughed it out so far, but i dont want to push it!
-------------------- kids and a wife, priorities have changed a bit still jobless!
Posts: 2502 | From: Gardiner Maine 00420ville | Registered: May 2000
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