Papparone69

Hello, I am New to this site but I need some help and clarification with this Sub box that I designed. It is going to Hold 3 Memphis 10" Subs. The required Volume for the sealed box is .75ft3 for one sub so three of them will require 2.25ft3. The Pictures i have included explain everything. Now i asked a few people that know about subs a little bit but im sure not as much as most of the people on this forum. the question was i can do two subs pushing out and one sub going in. but one guy said that i need to completely seal the sub pushing in will plexiglass no holes. I do plan to put plexiglass there with holes in it creating an Design. Any Help/advice will be greatly appreciated!! The Box is being made for Clarity and Bass so thats why i made it a little smaller than spec.

psychoacoustics

it looks nice

danyman

iTrader: (1)

i dont think you would need to enclose each subs. just invert the polarity of the inverted sub so it moves with the other 2 or anyone correct me if im wrong

scuba789

I might be mistaken, but that looks to be a sealed, isobaric loaded, enclosure. Those designs usually require half the box volume of one subwoofer at the cost of using two drivers. In your case, that box should sound better if you reduce it's volume by about a third (since there are three drivers).

If you can spare the space put all three in a regular sealed box (2.2-2.5 ft^3) and you will have more output than this isobaric design (where you'll have the output of two drivers). If you cannot spare any space building the enclosure to be ~1.5 ft^3 will probably sound better.

With isobaric designs you also need to be aware that port noise, tinsel slap and other mechanical noises may become more apparent because the enclosure will not isolate them from the inverted subwoofer.

All in all, if you want to build a unique and creative box then go for the isobaric design. If you can spare the space use a regular sealed box and you will gain more output.

psychoacoustics

its kinda hard to see but is " area 1" sealed with a pipe joining the two sides ? or is that a port of some

isobaric designs are designed to do one thing make a small enclosure work on a driver designed for large boxes.
the new car audio drivers are designed to work in a small enclosure so there is no need if you want to see the motor just mount the sub that way taking in to effect to make the box just slightly smaller to adjust for driver displacement

please explain the design a little better though it might clear up the discussion a bit