18 Fi BL bottoming out easy??

[ItsAJeepThing 10+ year member]

Hi, I have a Fi BL 18" that I traded a friend for. He ordered the sub new with daily option and flatwind coils he told me. It is currently in a 5.8 cubic foot box tuned at 33hz. I have some music that gets pretty low and when the notes drop low the sub bottoms out pretty easy. The subsonic filter is on right around where the box is tuned at. I even turned it up a hair more. I have seen other Fi's move almost like they cant bottom out like the ssd and btl. Is the BL's xmax just really small for Fi or could I do something to help. I am going to build a new box that is 6 cubes tuned at 28.8hz. I was also going to get an audiopipe 1500 but im not sure since it is bottoming out this easy on the audiopipe 10001D. Any suggestions would help.

Thanks.

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[Bettr n' Revrse 5,000+ posts]

Wired out of phase?

 

[ItsAJeepThing 10+ year member]

Sorry for being the noob. But could you explain please?

 

[Bettr n' Revrse 5,000+ posts]

Mixed up the postive and negatives...

 

[ItsAJeepThing 10+ year member]

aaww yes ok. I will look tomorrow. Thanks!

 

[Bettr n' Revrse 5,000+ posts]

With a single sub setup it can be hard to tell sometimes...

 

[SPLaudio 5,000+ posts]

phase wont make a difference.

is ur bass boost on? the spiders r probley beat...

 

[d2k 10+ year member]

box is too big....???, port is too big...???

0 sound pressure would see the sub flopping around all over the place would it not...???

 

[slim2fattycake 10+ year member]

are you sure the box is built to what you think?

 

[RAM_Designs 5,000+ posts]

are you sure the box is built to what you think?

This.

 

[slim2fattycake 10+ year member]

Also, are you sure your friend didn't beat it to hell and not tell ya or just didn't know?

 

[ItsAJeepThing 10+ year member]

I know the box is built to those specs because I know the guy who built it. The bass boost is not on. When I push on the sub itself the suspension feels very stiff still. So I don't know what's up. I think im going to have a box built smaller and see what happens.

 

[SPLaudio 5,000+ posts]

if it has hit bottom more than likely there is already damage to ur coil.

 

[SPLmatic 10+ year member]

wat