Alpine sub, bottoming out?

[tgamblin]

Hello all, I have recently Purchased a new Alpine SWS-12D4 to replace my previous Shallow mount S series. It just seems to make a slapping sound similar to bottoming out across all volume levels gain high or low, I am not running any bass boost in my setup. Im pushing it with an Alpine MRX-M50, Gains were set with multimeter. Alpine Recommends a .9 ft^3 Sealed enclosure and i put it in one that measures .85. Any help is greatly Appreciated.

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[psych0ticnemes1 5,000+ posts]

It doesn't sound like it is bottoming out if you aren't pushing it very hard. Are you sure the bottom of the sub has enough clearance in the box? The sub isn't hitting anything in your trunk is it? You're sure it is the sub and not something in your trunk? I've heard of these subs being faked. Did you buy it off ebay/ amazon?

 

[tgamblin]

Its actually behind the passenger seat of a Single Cab Pickup. But i have a little better than a 1/2 inch clearance to the back of the box... I did purchase it off ebay open box never used but if it is a fake it is the most convincing fake i have ever saw of anything...

Edit: Heres the listing: http://www.ebay.com/itm/330952246648?ru=http%3A%2F%2Fwww.ebay.com%2Fsch%2Fi.html%3F_from%3DR40%26_sacat%3D0%26_nkw%3D330952246648%26_rdc%3D1 Seems to be a good seller with 100% positive feedback..

 

[tgamblin]

Problem solved.. had the seat to close to the sub and it created a sound simmilar to bottoming out.. Yep.. Im an idiot //content.invisioncic.com/y282845/emoticons/banghead.gif.8606515f668c74f6de0281deb475b6fd.gif