front loading??

[lincolntc690 10+ year member]

would i benefit from front loading my btl? tell me how to make my sketch up a jpg ill show my idea. i seen 2 dd's with a nice etched plexi cover somewhere

what are the benefits

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[Immacomputer 10+ year member]

Increased power handling and output are two possible benefits. It might make the frequency response be a little peaky though.

 

[lincolntc690 10+ year member]

how do i get skp files to jpg so i can up a pic?

 

[thevic24 5,000+ posts]

i have a dd1508 that i just put a 1/4" plexi loading wall on. it just covers the driver and i have it about 1" above it. it did help with power handling a bit and it did add some punch.

 

[lincolntc690 10+ year member]

is there a right way to determine the distance from the sub to the loading wall?

 

[thevic24 5,000+ posts]

i just took a guess at mine and it seems to work good for me. the wall did help with feeding 1k+ to a dd1508 in a 1cuft box.

 

[netzero 10+ year member]

What exactly is front loading? Is it just a sheet of wood/plexi a few inches off the subs?

 

[unrated 10+ year member]

how do i get skp files to jpg so i can up a pic?

save the sketchup file in 2D

 

[Immacomputer 10+ year member]

how do i get skp files to jpg so i can up a pic?

Hit the Print Screen button (next to F12) and then open MSpaint. Go to edit --> Paste and then save as a .jpg file. Then upload to a place like http://www.tinypic.com and then post it here.

The distance should be based around the total surface area of the air between the loading panel and the enclosure. This should be more than the Sd of the driver. For instance, lets take a 15" by 15" loading panel over a 12" sub with an Sd of 75in^2. The total surface area of the air mass would be 4*15"*h where h is the height off of enclosure. 4*15 = 45in. Now if we put the loading panel 3" off of the enclosure, the total surface area will be 3"*45" = 135in^2 which is more than the surface area of the driver so you should be safe. I would shoot between 1.25-2x the surface area of the drivers' Sd.

 

[lincolntc690 10+ year member]

this is what i had, going off the idea it needed to be atleast as wide as the port

 

[lincolntc690 10+ year member]

pic added

 

[lincolntc690 10+ year member]

up

 

[netzero 10+ year member]

I would do what imma said, but cut the glass short, so it doesnt cover the panel.

 

[Immacomputer 10+ year member]

It doesn't have to be wider than the port. You can cut it down smaller without any ill effects. You will notice bad effects when you don't allow for enough exit surface area. In your case, make sure the exit area is about 1.25-1.5 times the Sd plus port area.

 

[lincolntc690 10+ year member]

thanks immacpu. im goin sub/port back and i want to minimize hatch rattle a little. thanks for all the help