so i wired up an alpine type r 12, (2ohmdvc) and am running the full 500 rms to it from an alpine m1000. its wired in series to have a 4 ohm load and is in the exact specifications for a sealed box as givin in the manual.

the sub sounds amazing, but what ive noticed is that when at moderately high volume with my rear hatch open the sub pops as it hits? and also when at very high volumes with the hatch closed it sometimes pops as well.

maybe someones had the same experiance and knows whats going on i cant figure it out.

 

Sounds like your sub is bottoming out. This easily happens with sealed boxes if your not careful. If sealed is the way you want to go, remove a little air space with some spare wood.

 

i cant figure it out... how could it be bottoming out? the rms for the sub is 500 watts and im not putting near that into it before it starts popping.. maybe 300 ish? why would it do this if the specs are dead on alpines recomendation

 

Hard to say, maybe clipping, are you using bass boost? maybe subsonic Xover frequency set too low.

 

cus its a type r

 

Whats wrong with Type R's? They are mean subs for dirt cheap. I kicked the out of the for over a year with a vr4000d and spl'd them to a 149.9 which just so happend to do the same number as my DC's on the vr4000d.

 

ya I guesss for the money its not a bad buy , thats pretty crazy that the dc sub didnt gain u anything what stage dc do u have ?

 

level 4 with level 5 coils. The Type Rs were maxed out though, the DCs didnt break a sweat Not even with the Stetsom at .5

 

ya they make good stuff

 

old thread i know but... i had 1500 rms on a single 10 type r and never bottomed it out so... if you are bottoming itout your box would be way tooo big or its a broken sub or a loose panel on your box