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mat3833
01-15-2013, 10:01 PM
ok, so i just finnished my box measurements and laid them out on the wood to be cut. and since its dark i decided to model it in Sketchup because im bored. long story short, i think im a retard.... my box dimensions are 20X15x10.5. the sub going in it is SPLaudios prototype 8(SA-8 basket basicly, gives you a size refrence). now im using a 3' aero(internal diameter, .25" wall thickness, outside Diameter is 3.5" that is 14" long(not including possible flare). the problem im running into is the "keep your port a port width away from all walls" rule. box layout is in the pics below.

with the current "sub centered and at the bottom, port centered at the top" settup i dont think i will have clearance for the port to fit.

can i just shift the sub to one side and the port to the other and be fine? of do i need to re-draw this ****?

Matt

P.S. please excuse the not to scale, drawn by a 4 year old, paint drawing....
26539132

mat3833
01-15-2013, 10:11 PM
oh, and when i model it in sketchup the port ends up being right under the sub cutout, hence why i think im a retard.....

Matt

mat3833
01-15-2013, 10:14 PM
double 07 ;
pro-rabbit ;

bumppinKota
01-16-2013, 01:17 AM
i like the drawing. sorry i have no advice to help you tho

VWBobby
01-16-2013, 01:43 AM
That sketch is legit... lol

An L-Port box is one way to get more port area while keeping a relatively small box. Standard round/square port boxes have to take into account the tube itself + the limited area you can devote to a tube/hole in your box. ;)

L-port box calc: RE AUDIO - Box Calculator (http://www.reaudio.com/box.php)

double 07
01-16-2013, 08:58 AM
If you can still net the required cf do a small slot.....

mat3833
01-16-2013, 11:17 AM
****... so i cant just shift the sub to one side and the port to the other? ill have to make the box a fair bit larger to get 32hz with a slot port. plus it will have to be a 1" X 9" slot and thats not very optimal. im going to try and fudge the dimensions some more.

hell i may end up just making part of the port external since im tired of designing boxes. lol

Matt

mat3833
01-16-2013, 11:21 AM
oh, what would optimal port orientation be in a situation like this? id like it to be sub upfire and port sidefire of sub frontfire port sidefire.

Matt

mat3833
01-16-2013, 01:45 PM
ok, so i made a cardboard box and laid out the port and sub. the following pictures show the 2 ways i can lay it out. there is technicly a 3rd, but that involves sub front/port side. the sub just moves from the top to the side opposite the port tube centered.

265391952653919626539197265391982653919926539200

you guys think the offset port/sub will be good enough? or do i really have to re-design and re-lay out the box? and they arent exactly to scale, but they are a fairly accurate representation.

with the sub and port centered the port is ~2" below the sub and the mouth ends up almost at the pole vent.

with the offset there is no overlap. the port is a port width off the side of the box and 4" from the bottom of the box.

Matt

PS double 07 ; last time on the call out double. lol

double 07
01-16-2013, 02:01 PM
No the offset is fine....as long as the sub's motor is not backing up into the port mouth.....dang that sounded dirty didn't it?.......lol

cdc351jeferson
01-16-2013, 03:36 PM
No the offset is fine....as long as the sub's motor is not backing up into the port mouth.....dang that sounded dirty didn't it?.......lol

Lol

mat3833
01-16-2013, 03:54 PM
sweet, now i just need to come up with a flare for each end of it. might use a round over bit on the outside to give it a bit of a flare. inside im not sure yet.

Matt