Building a Box

[AznVirus]

wait wait, i wanted a wedge box, something like this, sorry for the confusion... hope its not TOO much trouble to redesign it

[P11GT]

thats what it is man!!!!

[frogg]

heh, that is a wedged box

[P11GT]

Originally posted by frogg
heh, that is a wedged box

Thanks Frogg, thats what i intended it to be. It just could be that i havent exagerated the slope enough on the diagram, but it is a wedged box, with the subs mounted on the sloping side as requested.

[AznVirus]

oh ok, just checking, it looks like its wedged on both sides

[AznVirus]

Originally posted by P11GT
Here you go Aznvirus, the first part of your box.

where is sides E,F,G?

[P11GT]

see diagram

[AznVirus]

Originally posted by P11GT
see diagram

oh i get it, so both subs are going to have their own air space, didnt know there was a piece hidden inside the box.

[P11GT]

yep, gotta keep things right.

[AznVirus]

cool, im sending the check for the subs, so ill receive it within 3-5 days.

btw, why is bridging better then just normal? and can you tell the difference between 2 ohms and 4 ohms?

[P11GT]

in theory, by going down in ohmage, you can gain dB, i.e. 8 ohm sub would produce, say, 140 dB but if you then run it at 4 ohms, it will be 143 dB, twice as loud as before!! this is what ive been told, thats why i wire the subs in series and bridge the amp providing it is a 2ch amp. After experimenting with the wiring in subs, ive found that series gives the best result, but it does depend on the equipment.

BTW, check to see if you can purchase your MDF board in 18mm (3/4 inch) and what size the sheet comes in. Its best to buy a full 8 x 4 Ft sheet, cos it works out cheaper. You wont need all of it, but it'll do for spare. The reason i ask, is so that i can give you a plan of the wood, and how to cut each panel, so you get the most out of the MDF sheet.

[AznVirus]

ok ill go check the hardware store for 3/4 in. MDF. btw, why do i need the contact adhesive, those are just strips of adhesive tape right? is it for extra "stickyness" of the accoustic carpet?

[P11GT]

nope, contact adhesive is a glue, but what you do is, you cover both surfaces, allow it to go tacky, then press them together. Its the same stuff they use on self sealing envelopes, and is really strong when done correctly. It doesnt absorb into the acoustic carpet like some glues can, so it wont effect the finish, thats why people use it.

[Swonder67]

Hey, P11GT, I was reading that the optimal design for a sub box is spherical. Something about standing waves or somethin? Anyway, you ever think of takin it on as a project?

[P11GT]

Hey, anythings possible. Making a spherical sub shouldnt be too hard, i think the idea is that the sound waves just bounce around and dont cause them to cancel waves coming from the sub. Good idea. I'll think about it