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Message: <blockquote data-quote="75MonteCarlo" data-source="post: 1314385" data-attributes="member: 556815">Hey all, well I had 2 type r 12's in a 4th order bandpass, and I didn't bother to break them in, and I bumped them as hard as they could go for about 2 weeks, and then one of them blew on me, cracked the cone real good and detatched the spyder. So anyhow, I got that one replaced for free and bought a prefab box just so I could get some bass until I can afford to build a cutsom box, or go with a tcab. Anyhow the prefab is built to spec for the drivers pretty well. its ~1.7 cubes per side, slot ported, im guessing tuned to 35 or 40 Hz, with seperate chambers for each sub.Anywas, I put the non-blown type R along with the new type R into this box, and this time I break them in for a good hour or two at least of playing time, being loud, but not pounding hard. I gradually worked my way up in volume until I had them bumping real good these past two days because its been melting out, and I know not to bump subs hard when it's freezing cold outside. Anyhow, all goes well for a while, these things get nice and loud, shakes everything in the car, blows my zippo out when I try to light a smoke, and i'm quite happy. Then today (2nd day of playing them loud) one of them messes up and startes making a clicking noise that I could hear in the car.. so I get out and watch, and its the older sub that was in the old box with the one that blew. Sure enough, its not getting as much excursion as the replacement type-r, and its making this clicking/clacking sound on all the beats. The port also smelled like burning electronics.Here's what i've got powering them: A Rockford T10001bd amp, birthsheet says 1440 rms @ 1ohm. Both subs are dual 4ohm V.C. and I have them wired in series down to 1ohm, so they should be getting around 720 rms each. Now I  know that alpine recommends 500rms, but what i've read on here, and from what people have been saying, these things should be able to take 720 daily with no problem. Am I wrong? Is there something i'm missing here that could be causing these subs to blow on me? I have the gains on the amp turned down to about 70%, and they sound like they're set correctly, plus I have the HU Bass level turned down to -3, so I should not be clipping the power.What is causing this? Or do I just have really bad luck and i've gotten two bunk subs?//content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif</blockquote>

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