5.25" neo sub box ?

[Fast1one 10+ year member]

Q is way too low for a sealed alignment, its going to roll off very quickly...

Edit: NVM, not that low, was thinking of the 6.5...still a little low for a sealed alignment IMO if you want anything below 50hz...

 

[sqhertz 5,000+ posts]

i still have enough scrap 3/4 mdf to put together a couple more boxes if need be. ill see how i like it, worst case i can do another.

it just seems like this - http://www.subwoofertools.com/forum/ported-box.asp?Ew=15&Eh=10&Dia=1&Xmax=9.5&Vd=.03&NumW=1&Vb=.7&Fb=32&Qts=&Vas=&Fs=&CE=0 - is friggen huge for a 5.25". and presonally , id prefer a L port if i could. i have no other program on hand and im terrible doing this with pen and paper...

 

[Fast1one 10+ year member]

i still have enough scrap 3/4 mdf to put together a couple more boxes if need be. ill see how i like it, worst case i can do another.
it just seems like this - http://www.subwoofertools.com/forum/ported-box.asp?Ew=15&Eh=10&Dia=1&Xmax=9.5&Vd=.03&NumW=1&Vb=.7&Fb=32&Qts=&Vas=&Fs=&CE=0 - is friggen huge for a 5.25". and presonally , id prefer a L port if i could. i have no other program on hand and im terrible doing this with pen and paper...

I would honestly just use a single precision port, 3 inch would probably be enough...4 if you want...

 

[BrianChia 10+ year member]

I agree with Fast1one... a ported box will really bring out the potential of the sub and is worth the extra size. To be honest, a 2" flared port about 10"-11" would probably work since your only feeding it 25W. WinISD predicts peak velocity to be under 25m/s at 25W power; that is less than Mach 0.1 which is usually a good guideline limit for avoiding port noise.

 

[sqhertz 5,000+ posts]

any way i could integrate one into this sealed box? what length would i need?

 

[sqhertz 5,000+ posts]

the roll off is very sharp. doesnt drop below 35hz very well. but it is very accurate and it is enough to fill in that low end i was lacking.

.6-.7cuft with a 2" , 11" long port would give me what? like i said , i still have enough scraps to build another box or two.

 

[BrianChia 10+ year member]

the roll off is very sharp. doesnt drop below 35hz very well. but it is very accurate and it is enough to fill in that low end i was lacking..6-.7cuft with a 2" , 11" long port would give me what? like i said , i still have enough scraps to build another box or two.

The difference? Here is WinISD's predicted plot of 0.25 cf sealed vs ported, 0.7 cf with 10.5" x 2" dia. port (~32 hz):

 

[sqhertz 5,000+ posts]

would this adjustable work? http://www.partsexpress.com/pe/showdetl.cfm?&Partnumber=260-387

or could i just use a 2" pvc?

 

[sqhertz 5,000+ posts]

i took a pic of my bearded dragon helping assemble everything...

 

[BrianChia 10+ year member]

Yeah, I think that port will work beautifully //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif.

Nice lizard by the way.

 

[sqhertz 5,000+ posts]

good stuff. .7 with a 10.5 " port. where should i put the port at?

he was so curious when i was putting everything together. on the box , pliers , sub. he fits perfect in the 5.25" lol.

 

[BrianChia 10+ year member]

I would probably try both sub and port down-firing or if not, both front firing.

 

[sqhertz 5,000+ posts]

should i tune lower if i wanted to use it for both movies and music?

 

[sqhertz 5,000+ posts]

and how far should the port be off the back wall?

btw, thanks for all the help. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif