Subs hitting imporperly?

[OneMeanS1x 10+ year member]

Heres my problem. I used to have 2 diamond audio 15cm3s hooked up to a crossfire vr2000d. It hit hard as hell, then one day it sounded about half as loud, and I noticed one woofer was hitting a split second after the Right. The port is on the right as well, and while i heard its normal for this woofer to extend more than the woofer further from the port, it still sounded half as loud. So I bought some new 15" Orion H2s and put them in today, thinking that one of my old diamond audio 15s was blown or something was wrong. Any ideas? The box has about 3ft of cubic air space per sub, which i know is FAR too much for a woofer getting 1000w RMS. I understand this can make the woofer less loud, but it doesnt describe why one day the woofers would bounce differently or sound alot softer. The only possible thing I could think of is that maybe the one woofer's polarity is reversed, which I will be checking out tomarrow. Thanks in advance for anyone that has any ideas.

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sounds like the box is a single chamber, and one of the woofers took a dump because you were going over the thermal or mechanical capicty for that driver.

basically when you push a driver to its limits - the voice coil heats up, and the pole piece sucks\blows air across the inside of the voice coil by the movement of the cone- cooling it down. the cone can only move so far (Xmax) and once you reach that distance, the maximum ammount of air is being vented through the pole piece - cooling the voice coil. thats its maximum amount of cooling ability. if you feed it more wattage after you reach Xmax- the cone wont move any further, it will let the heat build up in the voice coil, and eventually it will melt the coil to a black fused piece of copper.

or the coil will 'jump the gap' from a burst of wattage and become misalinged, and break itself on the way back down. (mechanical)

if one driver is still 'moving' but not as much (in a single chamber box) with the other driver still plugged in, then it might not be playing at all or be blown but you might still get a little sound outta it. unplugg the other speaker in that box, and see if the other woofer works.

also, gently push onto the middle of the cone of the 'blown' driver and see how stiff it is, compare\contrast to the working driver, and if the one that isnt working is much stiffer, than most likely you fried it.

turn the gains down or get a subwoofer with more XMAX and higher power handeling to solve your problem.

sounds to me like you just gave it too much wattage in too big of a box. good luck, hope that helps.

 

[OneMeanS1x 10+ year member]

Wow. Thank you so much for your help and shareing your knowledge on this subject. The box is a single chamber. The only thing is, i noticed this within 2 minutes of putting power to to the woofers. When i push on the center, i notice no resistance what so ever.

As for the xmax, this woofer handles 2000w RMS. I pushed 1000w rms for less than a few minutes.

Which speaker should I unplug? The one that bounces less I take it?

I have a line driver, so I guess turning the gains down is the best bet, assumeing that the woofer isnt destroyed. I guess I just need a new box and 2 Diamond Audio TDXs. Any other advice would be great. Thanks!