Help Me Please...

[bluelceii 10+ year member]

I have a 400 watt amp and a 12" compVR (the ol' black one). now... before I had it in my little car in a truck box, everything fine wiring good, no clipping, no popping, no shutting off over different periods of time. even had friends telling me it sounded good for a truck box. (which I was like "whatever") but anyways. I had a friend build me a box (2.2 @ 32-33Hz) dunno if its too big or too low or not but to the specs I found, it was just right. anyways to my point... we got the sub mounted in the box, wired the exact same way except for bigger speaker wire. NOW, the sub makes a popping noise kinda like.... to the beat. (ex: it pops when a snare hits) I turned the bass filter (or whatever it is) on the H/u to the sub down to 50Hz and its still doing it. what is wrong?? I have the pioneer premier deh590IB, the sub is a dual 4 ohm. is it due to the box build/size/tuning??? //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif//content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif//content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif//content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

btw, the gain was half way up but now its only 1/4 up due to this problem...

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[jdc753 10+ year member]

No one else has responded yet so I guess I will give it a shot.

My best guess is that the sub is bottoming out. First question is do you have a subsonic filter on your amp? With the sealed boxes its hard to run into this problem cause the sealed air in the box acts as a suspension only allowing the sub to move so far, but with a ported box you loose that natural suspension and run the rist of throwing the sub too far. The box seems to be about as big as kicker recomends (least for the new CVR's I think they are similar) I'm guessing between your tuning on the box and the volume that you are bottoming out the sub.

I guess I would recomend turning on the subsonic filter if you have one and setting it to around 32-33 where your box is tuned to, and then start setting the gains properly for the correct box. The Bass filter on the HU shouldn't really effect this issue, as it limits the frequencies on the upper end of the range, and the subsonic will limit them on the bottom of the spectrum.

 

[mtlhead 10+ year member]

check to make sure the LPF is selected on your amp

 

[bluelceii 10+ year member]

check to make sure the LPF is selected on your amp

it is... me and my friend, who built the box, will check on everything tomorrow...

 

[JLJunkieMX107 10+ year member]

i recently had the same problem with one of my JL 12's. turns out the rca plug had a loose wire and the vibrations were causing it to clip a little bit. dunno if that helps but just a suggestion to look for. also check for air leaks in your new box.