Box Q

 

Silver Member
Username: Rzarector

Coquitlam, Bc Canada

Post Number: 573
Registered: Dec-04
ive talked about this with glass already but just want to know something.. i have to alpine 12" type X's ... they seem to be designed for sealed boxes as they have a high Qts (0.64).. if i made a ported box for them would i accually lose spl?.. also what is it that makes a driver suitable for ported or sealed enclosures? does it have to do with the stiffness of the suspension for the driver?
 

Silver Member
Username: Rzarector

Coquitlam, Bc Canada

Post Number: 575
Registered: Dec-04
^ my plan was to build to boxes 1 for spl and 1 for sq.. but if theres no gain theres no point
 

Silver Member
Username: Rzarector

Coquitlam, Bc Canada

Post Number: 580
Registered: Dec-04
bump
 

Silver Member
Username: 54danny54

Post Number: 868
Registered: Nov-04
a higher qts is a ported box man
 

Silver Member
Username: Rzarector

Coquitlam, Bc Canada

Post Number: 581
Registered: Dec-04
i believe it was 0-40 Ported 40-50 flexible for both and 50 and up sealed
 

Gold Member
Username: Glasswolf

Wisteria, Lane USA

Post Number: 8946
Registered: Dec-03
yeah that'd be ported. I thought the type X was a lot lower than that
I don't see very many people use that sub though so I forget.

 

Gold Member
Username: Glasswolf

Wisteria, Lane USA

Post Number: 8947
Registered: Dec-03
sorry I was being nagged at when I was trying to post and got distracted.

here:

Efficiency Bandwidth Product (EBP)
EBP = Fs / Qes
50 or less = best used in a sealed enclosure.
50 - 90 = flexible enclosure options.
90 or greater = best used in ported enclosure.
-OR-
Qts < 0.30 - ported
Qts = 0.30 - 0.50, use ported or sealed.
Qts > 0.50 sealed

o I was right.. it is mant for sealed.
 

Silver Member
Username: Rzarector

Coquitlam, Bc Canada

Post Number: 586
Registered: Dec-04
dude.. lol..
SO Since it is obviously designed for sealed.. i go back to my question .. would building a ported spl box gain little to nothing spl wise?
 

Gold Member
Username: Glasswolf

Wisteria, Lane USA

Post Number: 8967
Registered: Dec-03
you'd still get more gain from a ported box.. it just won't sound that great.
 

Silver Member
Username: Rzarector

Coquitlam, Bc Canada

Post Number: 595
Registered: Dec-04
alright thank you gw.. il most likely build both boxes (sealed , porter) .. never know for sure till u try right?
 

Gold Member
Username: Glasswolf

Wisteria, Lane USA

Post Number: 8983
Registered: Dec-03
yeah sizing is pretty generic. you can always change port length and stick a different sub in the ported box if ya scrap it for the sealed.. or vice versa
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