sealed or ported???

[Car Trekker 10+ year member]

EBP is Efficiancy Bandwidth Product

EBP = Fs/Qes

Less than 50...sealed only

50 to 90..........sealed or ported

over 90............ported only

Use as a guideline only, and follow manufacture's advice.

http://www.bcae1.com/spboxad2.htm

 

[Apoc 10+ year member]

good to know! Do all subs have a rating like that?

 

[squeak9798 5,000+ posts]

good to know! Do all subs have a rating like that?

All subs have a Fs and a Qes, but you will probably need to calculate the EBP yourself most of them time.

Then, Qts is basically how well a speaker dampens (or controls) the cone motion itself, both electrically and mechanically. Typically, you shouldn't port a sub with a Qts of greater than 0.4

 

[squeak9798 5,000+ posts]

Shucks, I was just about to throw my Kicker S12L7 into a ported enclosure and then I read this ... Now I know I should use it in a sealed enclosure because it has a Qts of 0.666 ...

Goober, I said it was a general guide, not the 11th commandment. Quit being a smartass //content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif And frankly, L7's do sound like ass ported //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[tRiGgEr 5,000+ posts]

For that perticular sub I still say sealed would sound amazing.

 

[Spkrman]

Goober, I said it was a general guide, not the 11th commandment. Quit being a smartass //content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif And frankly, L7's do sound like ass ported //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

but sealed they are solid SQ. I mean rock solid type SQ subs... //content.invisioncic.com/y282845/emoticons/angel.gif.fa7795fff6653f4381ba158c55a48b74.gif

most subs lose SQ ported... l7 lose SQ ported, but thats on top of already sounding like butt.

 

[Apoc 10+ year member]

like do certain brands make certain types or is it all dependant updon the model?

 

[Spkrman]

model //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[BASS OUTLAW 10+ year member]

ok thats a nice thread,

just divided my Fs/Qes (30/0.33=90.9090)

 

[Spkrman]

with a qes of .33... i'd think so.

 

[BASS OUTLAW 10+ year member]

yeah cause the sub doesnt peak @ high frequencies, like 60hz or so, it actually plays them lower than low bass notes, and i am hattin it big time, will go 1.75 cuft @ 35hz, when i get some cash for MDF 3/4"