quick sub box help

[bmwking]

On 7/18/2018 at 11:28 AM, Hellbilly429 said:

Really hard to get an accurate reading from WINISD since I'm missing parameters for the sub, but it looks like it should be fine with a 35hz tuning at 1.33 net, getting you port area of 33 (min. is 26 according to Triticum's calculator, and optimal is 35.) WINISD is graphing that with 1800 watts applied, your port velocity should be below 24 m/s. Definitely use subsonic filter at 25-28hz to not exceed excursion limits at lower frequencies.

sooo... attempting to make a model in sketchup and well... i cant seem to get 48" of port length.  should i be folding the port over itself?  

[Hellbilly429]

Depending on the mounting depth of this sub, you should be able to get away with an L-Port with an addition port wall on top of it like this:

[bmwking]

7 hours ago, Hellbilly429 said:

Depending on the mounting depth of this sub, you should be able to get away with an L-Port with an addition port wall on top of it like this:

cool thanks!  so that wont effectively reduce the volume of the box?

 

fyi mounting depth is about 7"

[Hellbilly429]

That port volume is already calculated into the design, so no, won't reduce the volume of the box from the design sent.

Good! You should have clearance then. From the port wall to the inside of the sub baffle should have 10.25" of distance left. Depending on if you mount the sub on top of both baffles, or recess it into 1 baffle, you should have 4-4.75" of clearance behind the sub when mounted.