Ok I got a box built got my 18" DP in and well here is the issue only songs that sound good on it is Trunk Bang and Counterfeit by young joc both very low songs.

Box is 5 cubes tuned to 36hz IA DP 18" on a AB 400.1 at 1 ohm at 4k in a Chevy 2500HD 4 door 2 x 2400's 1 foot from amp 2 batteries up front, 250 amp alt, 2 runs of 1/0 back, 2 1/0 grounds.

Nothing else is as loud as those songs I like Little jon use to be loud as crap on my 2 nightshade 12's but my box was tuned to 40hz then. I figured it would be close but it s no where even close to being as "loud".

Any ideas? Maybe changing the tuning to be higher maybe taking it back to 40hz?

Edited January 30, 201015 yr by RetroAudioInc

BTW I had a nightshade in the same box acted the same way, traded it for the DP as they tend to take a bit more power then the NS. It takes the power fine BTW..

How do you have your crossover,ssf and HU set?

Might just be some fine tweaks to get you going. The DP should be loud!

How do you have your crossover,ssf and HU set?

Might just be some fine tweaks to get you going. The DP should be loud!

crossover is around 80, SSF is around 30 ( I am added a Audio Control DXS monday so it will control SSF and xover digital so i know I am dead on ), head unit xover is at 80, +plus 2 on bass, eq is rather flat for sub, it goes 40/80/120 for subs 40 is +2db.

Any ideas?

Edited January 30, 201015 yr by RetroAudioInc

Have you played around with the crossover frequency? Maybe set it a little lower. You may want to just use one crossover instead of both. Even though both are set to 80Hz there may be difference in frequency between the 2.

Have you played around with the crossover frequency? Maybe set it a little lower. You may want to just use one crossover instead of both. Even though both are set to 80Hz there may be difference.

I don't think I can turn the one off on the head unit though I would have to check out just jack it up to 120 until I get the audio control in there then just turn them all up and let the AC control it all..

What would be the best final SSF, xover for my setup? The AC I can set it dead on and just raise all xovers and turn the ssf all the way down on the amp..

Have you played around with the crossover frequency? Maybe set it a little lower. You may want to just use one crossover instead of both. Even though both are set to 80Hz there may be difference.

I don't think I can turn the one off on the head unit though I would have to check out just jack it up to 120 until I get the audio control in there then just turn them all up and let the AC control it all..

What would be the best final SSF, xover for my setup? The AC I can set it dead on and just raise all xovers and turn the ssf all the way down on the amp..

Ssf could set anywhere between 20-30hz

Have you played around with the crossover frequency? Maybe set it a little lower. You may want to just use one crossover instead of both. Even though both are set to 80Hz there may be difference.

I don't think I can turn the one off on the head unit though I would have to check out just jack it up to 120 until I get the audio control in there then just turn them all up and let the AC control it all..

What would be the best final SSF, xover for my setup? The AC I can set it dead on and just raise all xovers and turn the ssf all the way down on the amp..

Ssf could set anywhere between 20-30hz

any chance you take a look at xovr settings on amp?

Whats the orientation of the box?

here is some photos this was with the NS but you get the idea..

Have you played around with the crossover frequency? Maybe set it a little lower. You may want to just use one crossover instead of both. Even though both are set to 80Hz there may be difference.

I don't think I can turn the one off on the head unit though I would have to check out just jack it up to 120 until I get the audio control in there then just turn them all up and let the AC control it all..

What would be the best final SSF, xover for my setup? The AC I can set it dead on and just raise all xovers and turn the ssf all the way down on the amp..

Ssf could set anywhere between 20-30hz

any chance you take a look at xovr settings on amp?

Yea I will check it again today to make its high enough..

What program are you using to calculate your box tuning? A box tuned to 36 hz shouldn't have any trouble playing songs in the mid 40-hz range. Sounds to me like your box could be tuned more like 28....haha

I could be totally wrong, but could you post the internal measurements of the box and your port dimensions?

Seems part of the issue was the amp xover, since I can't turn the one off on the amp or my HU really I set the HU to 125 and set the amp at about 80 and much louder, the person that set the amp had it about 40 on xover.. Ok that solved that issue..

Any one got any ideas on a back wall in a truck I have tried EVERYTHING I can. Here is what is done so far..

Second Skin Damp pro and SPL tiles on back wall with edead v3 black over that, 2 2x4's on the back wall with a peace of MDF on top of that to mount amps and such to. but now the back wall and MDF are vibrating. Should I just take the MDF off?

I am also going to try tennis balls in between the cab and bed to see if stops the back wall from moved I might try that before removing the MDF since they would help either way..

that must be brutal for the person in the back seat

HaHa you no one has ask for a ride since I put it in..

Not sure if its the ST350's right next to there ear or the 18 right next to them or the port pointed.. HAHA It's the torture seat...

Glad you figured out the problem

Do you think the IA will be ok at 4k?

Waiting on my box specs from the guy that built it, but I am almost sure its 5 cubes after displacement for the sub, at 36hz.

Also whats the specs on a DP like FS and such could not find it on the site to compare to the NS.

Edited January 30, 201015 yr by RetroAudioInc

We don't list specs on those woofers just because of the custom nature of the build. There are too many coil/suspension variations to give just one general set of specs.

A DP will be fine on 4k, but you need to be very careful. Any subwoofer can blow up at that power level.

I.A. FTW