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View Full Version : first time building a ported box.



ThatChevyGuy
11-19-2006, 07:02 PM
I spent the last week tuning and listening to this box. It started with one 3.5" wide port that was 4.5" long. No output at all, so i did two 3.5's at 15.25 each for 30 hz, that was louder and lot more flex but only three songs i have hit right on that, so i did three 3.5" at 15.25 for 38 hz. the box is 3 cubes, it was a sealed box for two 15''s. Now i just need more power. Ill make a vid of what it does on 600 rms and two twelves.I hope 38 hz suits my needs..http://www.putfile.com/pic.php?img=4034960
http://www.putfile.com/pic.php?img=4034959

coolahan
11-19-2006, 07:08 PM
i say make a new box.

Worlddre
11-19-2006, 07:08 PM
are the ports touching the bottom?

jeepintn
11-19-2006, 07:14 PM
that box is awful. burn it to the ground and start over.

Thieroff
11-19-2006, 07:18 PM
haha, wow, build a new box man, that thing is horrible


CT

Calikid
11-19-2006, 07:20 PM
:word:

azbass
11-19-2006, 07:20 PM
sweet box mang!

Death By Bass
11-19-2006, 07:20 PM
the ports ARE resting on the bottom... :s

its not even a ported box... lol

ThatChevyGuy
11-19-2006, 08:50 PM
the ports arent resting on the box im not THAT retarded. THere is about an inch and a half of clearance. ITs not pretty but its all i had to work with and it sounds **** good too.

Death By Bass
11-19-2006, 08:51 PM
the ports arent resting on the box im not THAT retarded. THere is about an inch of clearance. ITs not pretty but its all i had to work with and it sounds **** good to

that'll be fine then... as long as the ports are only an inch in diameter... :laugh:

ThatChevyGuy
11-19-2006, 09:10 PM
i think ill stay at carstereo.com

Death By Bass
11-19-2006, 09:13 PM
i think ill stay at carstereo.com

bloody good idea!!!

ThatChevyGuy
11-19-2006, 09:47 PM
just who the **** do you think you are.

Death By Bass
11-19-2006, 09:47 PM
just who the **** do you think you are.

I'm me... :) who are you? :laugh:

Worlddre
11-19-2006, 09:52 PM
really dude you would need one port dia worth of clearance between ports and a wall :fyi:

80INCHES
11-19-2006, 09:57 PM
i'm about to make the most useful thread in this thread
when u build your new box use this to help
http://www.reaudio.com/speaker_box/LPort_Box_Calc.html

80

baseballer1100
11-19-2006, 10:03 PM
I have to agree the box *****.

thatkidbob
11-19-2006, 10:04 PM
i agree... start over...

get some 90 degree corner clamps, some 36 & 48 inch bar clamps and some practice with that jig saw. Take the lessons you learned from this box and apply 'em to the next one...

and get a router too... you'd be surprised at the mistakes a router can make disappear, or never happen in the first place. As long as you've got a good design, a good cut sheet, straight cuts & 90 degree corners, building nice, pretty boxes is easy.

ALSO... when painting, the end grain of the MDF needs to be sealed, be it with primer or wood glue mixed with water... if you don't it'll just soak up paint like you probably noticed...

and oh yeah... you don't need that many screws bro :)
i use 2 joint... 3 on long ones.

azbass
11-19-2006, 10:05 PM
it was a good try i guess., but you need to go back to the drawing boards.

thatkidbob
11-19-2006, 10:08 PM
btw... when drilling MDF... predrill, then drill a hole about the size of the screw head, or a lil larger, then pop your screws in. that keeps you from getting cracks AND lets you drop the screw heads below the surface in case you decide to paint, carpet, or vinyl the box.

i just rmembered... when putting the box together, position the pieces perfectly using your 90 degree clamps. then apply glue, then put the pieces back together, then check to make sure your pieces are positioned properly, then clamp with your bar clamps, then check to make sure your pieces are positioned properly, then drill and screw... it'll save you from having to cuss later...

thatkidbob
11-19-2006, 10:15 PM
oh yeah... when building the box... have a plan to begin with. use a program like bass box pro, or even WinISD to model your response curve and adjust box size, port size and pot area before building... the time you spend here saves you the time it takes to redo what you've done, and lets you get it right the first time.

and also... when painting... you need a smooth surface to work with... you need to sand the wood thoroughly, then apply body filler to low spots, then sand more, until everything's nice and flat. you'll then need to spray a glossy black guide coat to bring imperfections to your attention, address these with fillers, glaze or icing, then prime the box. You'll want to sand your primer as well... don't be afraid to go back and redo things that you notice wrong... this is where most people mess up. Once the primer layer is smooth, spray a few coats of color, and as many coats of clear as you want. wetsand your clear and... voila... your box looks beautiful.