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View Full Version : Any help for a new guy on a box design?



iwearpro
09-03-2008, 04:33 PM
Hello,I am building a new system....I just bought a HDC312-A and plan on putting it in my trunk.....I am working with dimensions of 16 tall 32 wide and about 24 or so deap...I am building it for spl mainly right now....
here is the link to the site with specs.
http://www.audioque.com/aq/HDCSeries.htm

the amp ill be running to it puts out 3900rms at 1 ohm..

I had the subs built with aluminum coils instead of the copper and had it buit with dual 1 ohm coils so I can get that 1 ohm load...

Any love for the new guy would be awesome!

let me know if there is anything I forgot..

schrummy
09-03-2008, 04:59 PM
an 18 in your trunk?????why

iwearpro
09-03-2008, 05:06 PM
an 18 in your trunk?????why



It has fold down seats so its not fully enclosed in the trunk....I would like it to be firing towards the interior..

skadude016
09-03-2008, 05:07 PM
It has fold down seats so its not fully enclosed in the trunk....I would like it to be firing towards the interior..

the ports? I wouldn't if i were you

iwearpro
09-03-2008, 05:09 PM
Nooo I was gona fire the sub towards the interior and the port towards the rear.....Is this a bad idea?

skadude016
09-03-2008, 05:13 PM
Nooo I was gona fire the sub towards the interior and the port towards the rear.....Is this a bad idea?

you will have to do a wicked angle for it to work correctly. with only 14 inches tall to work with it aint much

iwearpro
09-03-2008, 05:27 PM
you will have to do a wicked angle for it to work correctly. with only 14 inches tall to work with it aint much


Yeah thats what I though too....Oh well,Im open to sugestions.

iwearpro
09-03-2008, 08:27 PM
UPDATE GUYS.....AFTER LISTENING TO COMMENTS I REMEASURED AND DECIDED TO GO WITH 2 12's INSTEAD.....NOW WITH THAT BEEING SAID..........

Im looking for a super slammin biggest spl design I can fit into that area......Im open to any ideas....Im up for big spl on this one.....

Thanks again Guys! And thanks for helping me make this decision..

mlstrass
09-03-2008, 11:30 PM
4 cubes @ 40Hz with 16^2 of port and a bunch of powe. Something like this one, but tuned a little higher:

http://www.caraudio.com/forum/showthread.php?t=344482

iwearpro
09-03-2008, 11:51 PM
I ran a port calculator with 4.0 cubes tuned to 40hz and it said with a 3" round to make it .78 long...? Is this right?

iwearpro
09-04-2008, 07:31 PM
Anyone help me on a box design for these...Im thinking of a recetangle shape rearward facing..
16 tall 32 wide and about 24 or so deap are the dimensions im working with.

lvjeffro
09-04-2008, 07:42 PM
http://reaudio.com/speaker_box/LPort_Box_Calc.html

put in these #'s

W=32
H=16
TD=24
BD=24
wood thickness=.75
sq port W=6.25
sq port length 2=0.0

the box has this for volume and freq.
box vol=4.3209
tuned frequency=40.150

SPY
09-04-2008, 10:04 PM
I had the subs built with aluminum coils instead of the copper and had it buit with dual 1 ohm coils so I can get that 1 ohm load...



Dual 1 coils will give you 2 ohm or .5 ohm final load not 1 ohm.

SPY
09-04-2008, 10:04 PM
double post

schrummy
09-07-2008, 10:06 PM
keep it as low as you can 13-14 inches tall and slide it all the way to the back to it will rear load. and i would go with a couple 4 inch ports......

iwearpro
09-08-2008, 11:00 AM
Dual 1 coils will give you 2 ohm or .5 ohm final load not 1 ohm.

2 subs
1 and 1 in series is 2ohm per sub,then paralel the two subs =1ohm load