help with my 19 cubic foot box

[olliemarsallo]

i am making a sub woofer box for my next project and i am using a
"dayton 18 inch classic subwoofer"
(Dayton Audio DCS450-4 18" Classic Subwoofer 4 Ohm 295-475)

i have used bass box pro to calculate the best box size for a extended frequency down to 21hz 118 decibels loud

but what i need to know is if it will work?

i have attached the bass box calculations (please rename the ending from ".asc" to ".bb6" so you can open it

cheers for any help

 

[GM]

Don't have BB6, but just doing a quick T/S max flat calculation using published specs yields a ~16.4 ft^3/21.5 Hz alignment, so wondering why the need for 19 ft^3 if you're not going to tune it lower.

GM

 

[norman bates]

yup, 20hz tuning is nice, but jeez, 16ft3 is a big box for a single 18, but that's the ideal 4th order.

Just because a driver can do 400 watts rms doesn't mean it is 6db louder than 100 watts.

Norman

 

[turbodawg]

I would pick a different woofer that goes low in a smaller box.

 

[OscarS]

It will work as in, you'll get the frequency response out of it, but I'd bet that it won't handle all that much power in the 30-50hz range where most bass lives. Post a screen shot of the excursion graph....

 

[Inductor]

It will work as in, you'll get the frequency response out of it, but I'd bet that it won't handle all that much power in the 30-50hz range where most bass lives. Post a screen shot of the excursion graph....

Xmech will be up from >15Hz by tuning to high?, up from 20Hz. I would double check, before final design or use some effective protection for LF, at around max. excursion/power 275/300 W@4 Ohms.

 

[OscarS]

Xmech will be up from >15Hz by tuning to high?, up from 20Hz. I would double check, before final design or use some effective protection for LF, at around max. excursion/power 275/300 W@4 Ohms.

I don't understand what you mean. "Xmech" is usually understood to be the maximum excursion before physical damage, is not a value that changes....so I'm confused at what you're getting at.....

 

[Scott L]

Nineteen cubic feet !!

Too bad you already bought the 18 inch "classic".

With an enclosure that HUGE, you could have put TWO of the 18inch
reference series RSS460HO-4

AND... do a reaction-cancelling mounting technique, that would be a SUB !!

p.s. I'll let the math guys do the alignment, but a quick glance at the specs tells me 19 ft^3 is still a tad bit too big even for a PAIR of the RSS 18's !

As soon as PE released this monster driver, I wanted it, even though I don't really need it !!

 

[Inductor]

I don't understand what you mean. "Xmech" is usually understood to be the maximum excursion before physical damage, is not a value that changes....so I'm confused at what you're getting at.....

Xmech (what ever it is) is going to be reached with a "bad" alignment. In this case with frequencies 15Hz and up? with alignments superior to 20Hz tuning. (lingo)