Modelling an SDX15....

[favelle]

Got some 20" sonotube and 6" PVC for the port and I plan on getting an SDX15 coupled with a BASH500. Want to dig as low as possible and this is 100% home theater (Blu-ray). Was thinking around 400L, but there is NO WAF, so can go as big as I want.....

Ideas?

[Mike P.]

400 liters would be as big as you'd want to go. You won't gain much in a bigger size. The Bash 500 would need the Hi-Pass filter set to 13.9 hz as shown in the boost table documentation. Maximum air speed is 29 m/s with a 6 inch port 19.5 inches long. You should flare the ends with MDF "doughnut" rings.

[favelle]

Port is only 19.5" long? That's not too bad. Should the part be "padded/dampened" as well as the inside walls of the enclosure, or does that matter?

[favelle]

Would it be advantageous to decrease the volume then to 350L? 375L? What's the optimum?

[Mike P.]

If low end output is what you're after for HT then 400 liters tuned to 15 hz works well. How big is the room?

[favelle]

Mike P. wrote:

If low end output is what you're after for HT then 400 liters tuned to 15 hz works well. How big is the room?

Room is 12' x 16' x 9' (1700 cubic feet). I am willing to give up plenty in the 30hz-40hz to get more in the 20hz and under.....

[Mike P.]

favelle wrote:

Room is 12' x 16' x 9' (1700 cubic feet). I am willing to give up plenty in the 30hz-40hz to get more in the 20hz and under.....

400 liters to 15 hz give you the most SPL at 20 hz and under. Is the room sealed off from other areas?

[favelle]

Mike P. wrote:

400 liters to 15 hz give you the most SPL at 20 hz and under. Is the room sealed off from other areas?

Yep, one door on the right side, but it is closed during movies.

[Mike P.]

You'll do just fine with this setup.

[looneybomber]

For maximum low end, why not go with a 14hz tune or even 13.5?

Isn't there a HP filter built into the Bash500's?