Ayone used an FI Q 18 in 4 cubes sealed?

[GLN305 10+ year member]

Why did you decide on 4 cubes each? FI recommends 4-8 cubes. Is it for power handling ability or just size limitation?I've been fantasizing about getting a Suburban and throwing a pair of the same FI Q 18's in the back, but going with the full 8 cubes each.

By my calculations just the driver displacement and bracing I/you will lose about 1 cubic foot per driver, so a 4 cube box must actually be about 5 cubic feet each. MY 8 cube box will have to be about 9 cubes each, unless you mount the drives inverted on the outside.

I too would like to hear them first, but not alot of people go for the big sealed SQ drivers that you and I want.

I'm thinking of a AQ2200 or even Sundown 3000 for power.

I actually have 10 cubic feet, but I was taking bracing and displacements into account. This air space is based on dimensional constraints. It's weird that not many people these days go for big sealed subs since that gives you alot of cone area and very little cone movement to get a really solid low end and good SQ by keeping the sub very linear. Most people want to buy a single 12" and give it 1500 watts and in the mean time stressing the sub and sacrificing SQ. I like efficiency. I had 12 10's in a Mazda B2200 and with the remote gain turned way down the low end was very clean and not exxagerated. It was solid as heck though.

 

[ultimate157 5,000+ posts]

FI>MJ's

as stated above, it should 'wang'

$100 says you've used neither.

 

[GLN305 10+ year member]

I'd agree that bigger is better with the sealed box.Also guys, I was not trying to argue that the MJ

was "better", just a less expensive alternative

that may be suited to the amp's power output.

I was wrong anyway cause the MJ's are SVC 4.

Since expense is not the issue between the two

as well, I will withdraw my suggestion.

Your suggestion is appreciated. I just don't prefer the looks of Mach 5's subs. If I were on a smaller budget, they would be on the way! Thanks for mentioning them.

 

[DidUHearThat? 10+ year member]

Most people don't care about SQ or even about music. SPL is there only concern. They are more interested in hair trick videos and being heard from 3 blocks away than in what it does for the music.

They just want to go "Boom!", it has nothing to do with music. I've even seen people run subs with NO other speakers in the car to play "music". Just a boom machine.

 

[GLN305 10+ year member]

Most people don't care about SQ or even about music. SPL is there only concern. They are more interested in hair trick videos and being heard from 3 blocks away than in what it does for the music.
They just want to go "Boom!", it has nothing to do with music. I've even seen people run subs with NO other speakers in the car to play "music". Just a boom machine.

OK

 

[blackmax 10+ year member]

gln305, Did you do the fi's? I am in the same boat and I was wondering what you went with.

 

[helotr3vor 10+ year member]

Im going to be putting an 18 bl in a 5 cu feet box within a month

 

[GLN305 10+ year member]

gln305, Did you do the fi's? I am in the same boat and I was wondering what you went with.

Nope, I bought three Dayton HO 15's instead. They take alot less airpsace and sound great. They aren't installed yet...still working on it. Here's a link to my install progress:

http://www.diymobileaudio.com/forum/showthread.php?t=45898