Btl build log. some pics.....first box ever

 

Bronze Member
Username: Corbin01gti

Post Number: 19
Registered: Apr-08
http://www.carstereo.com/forum/showthread.cfm?TID=52661&FID=4&CFID=21816156&CFTO KEN=12470009
 

Platinum Member
Username: Rovin

1 15 = 149.1DBsTrinidad & T...

Post Number: 13557
Registered: Jul-05
only 1 4" circle port ???....
 

Gold Member
Username: Loc_out

Santa Ana, Ca Resonant Eng...

Post Number: 1958
Registered: Feb-05
What size is that?
 

Platinum Member
Username: Wingmanalive

A pic is worth 1000 posts!!

Post Number: 15951
Registered: Jun-06
That's called a whistle box.
 

Gold Member
Username: Th3pwn3r

I compensate...

Post Number: 7920
Registered: Jul-06
Is that a sand-rail I see in the background? What the heck is that enclosure tuned to?
 

Diamond Member
Username: Bestmankind

Los Angeles, CA USA

Post Number: 20247
Registered: Oct-05
add another pipe.
 

Gold Member
Username: Denali_on_22s

I get Bucks like Milwa...

Post Number: 5353
Registered: Feb-06
yeah sub needs more port area
 

Bronze Member
Username: Corbin01gti

Post Number: 20
Registered: Apr-08
i used a port calculator. several. the port required for a box tuned to 34hz at 4ft3 is 3.75x4 deep. i might be wrong, but that would make the port calculators wrong. i do know that all the slot ports are huge compared to this.....im not sure being my first go at it. however, like i said this is what the calculation came out to.
 

Gold Member
Username: Denali_on_22s

I get Bucks like Milwa...

Post Number: 5361
Registered: Feb-06
Well tuning is one thing, but that sub still needs a lot of port area for it to perform up to par...
 

Gold Member
Username: Basssquared

Kansas

Post Number: 2070
Registered: Nov-06
X2 what she said ;) ^^^^^^^^^^^^^
 

Silver Member
Username: Deadrabit

Post Number: 347
Registered: Jun-07
u should of prolly doubled up ur mdf on the side that the sub sets in..
bigger port man, but it looks good for ur first. i have made 4 and still have a lot more to learn
 

Bronze Member
Username: Corbin01gti

Post Number: 21
Registered: Apr-08
i did double up on the front baffle. it sits recessed. i failing to understand my port dilema. i followed the recomended port displacement, yet you suggest its not adequate? please explain the logic behind the port being insuffucent please. i might be wrong but i think ive read enoght to grasp a basic concept. i also used a port formula to get the same port area from a slot port and it would of been 12x3x16 so in comparison a smaller aero port puts out as much dsiplacement as a large slot???i dont understand this that well. also if the tuning is correct how is that different from getting the box/sub to par? isnt the tunning the frequency in which the air is displaced making it the same thing as optimal performance?
 

Platinum Member
Username: Rovin

1 15 = 149.1DBsTrinidad & T...

Post Number: 13571
Registered: Jul-05
toolitlle port area = alot of port noise & its like ur 'stiffleing' the sub

a general guide for slotport would be at least 12sq" of port per every cuft

meaning if a box is 4 cuft then around 48sq of port will be fine OR the equivalent if u want to use 4" aeroports would = to (4) 4: aeroports ...

remember if a sub needs 4cuft that should be how much air is left after sub \ port displacements ....
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