Would A 15" Brahma in A ported box, be able to take over an 18" Ava sealed?

[Starky 10+ year member]

I want to get a 15" brahma....to take place of my 18" Ava....it would be in a Low tuned (25-30) Hz box...would the Brahma fill the shoes of the 18" well? and do I need a Subsonic Filter for a ported box ( my current amp doesnt have one)

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[mega1268 10+ year member]

brahma in theroy should be louder if thats what ur going for. Avalanche will prolly sound better install depentent ofcourse.

 

[iceteebone 5,000+ posts]

how much power we talking about going to each? the brahma will sound nice in a ported box.

 

[Jdizzle 10+ year member]

brahma>avy expessially if brahma is ported

 

[DFW40 10+ year member]

Would be close. The 18 inch sub gets an extra 3dbs for cone area but the Brahma gets an extra 3dbs for the ported box so it should cancel out. Alot depends on tuning and all that fun stuff but I would go with the ported Brahma.

 

[JimJ 5,000+ posts]

The 18 inch sub gets an extra 3dbs for cone area but the Brahma gets an extra 3dbs for the ported box so it should cancel out.

That's not quite how it works...at least in the cone area part.

I would stay with the 18" driver.

 

[Jdizzle 10+ year member]

i'd say port the 18

 

[iagrdshaka 5,000+ posts]

I think the ported 15" Brahma would be the better choice

 

[audioholic 5,000+ posts]

I guess Id chose which ever one is actually available.

 

[PV Audio 5,000+ posts]

brahma because it looks better

 

[T3mpest 10+ year member]

the brahma should theoretically be the louder sub. A sealed sub with equal excursion to the brahma would need to be a 30in sub. When dealing with something logarithmic like this your units don't matter. The Av's only an 18. Porting is generally specified to be a 3db gain, but it's pretty loose average.

PS.Porting brahmas makes me sad

 

[Starky 10+ year member]

Well...dude, if they made an 18" Brahma, i would get that....and keep it sealed...but since they dont, I need something with atleast the same amount of output as my old 18", ya see?

BTW....im going to be using a Mmats D200hc...about 1400 watts on the Brahma

 

[Starky 10+ year member]

no, I had the Mmat's amp for a while now, bought of a friend, and the brahma I would be buying local (very local 2 stories above me)

 

[Starky 10+ year member]

BTW is it neccessary to have a subsonic filter for subs in a ported box?

 

[puppie_chow 10+ year member]

Not necessary, but recommended.