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Prelimary results for triple chamber abc box using pvc instead box size much smaller

 

Gold Member
Username: Insearchofbass

Post Number: 2557
Registered: Jun-04
This is what i typed to subfanatic (demensions are internal)

i didnt expect the box size to reduce this much but at my current demensions the boxes internal cf is 2.33217592 quite a drop from 3.80 cf my box may end up a smidge more than 2.33217592 after i nail it all down exact but this will be so much easier to build and take up so much less room so far my demensions are 6.5 high x 31 wide by 20 deep to fit all three chambers for my two 6.5 tangbands
 

Gold Member
Username: Insearchofbass

Post Number: 2558
Registered: Jun-04
not including dividers for each chamber
 

Gold Member
Username: Insearchofbass

Post Number: 2559
Registered: Jun-04
old 3.80 cf box was external demensions i believe
 

Gold Member
Username: Insearchofbass

Post Number: 2562
Registered: Jun-04
ok here it is final results and i will not change it lol ....The box ends up being (3.58398958333
cf gross)

6.5 x 17.3750 (3/8) x 21=1.3725043402777 1.10 cf is the target 31.104 hz at 14.5 long .14 port volocity
6.5 x 9.0 x 21=.7109375 .55 cf is the target 43.295 hz at 14.5 long .10 port volocity
6.5 x 5.0313 (1/32) x 21=.39743776041666 .275 cf is the target 61.228 hz at 145 long .07 port volocity
1.925 cf net wolume

.04 displacement per 2 inch port at 14.5 long so .08 per front chamber (interior ports)
.02 displacement per 2 inch port at 7.25 long in chamber 1 and .02 displacement per 2 inch port at 7.25 long in chamber 2 near side (interior ports)
.02 displacement per 2 inch port at 7.25 long in chamber 2 far side and .02 displacement per 2 inch port at 7.25 long in chamber 3 near side (interior ports)

so .08 front ports plus .04 interior ports in chamber 1 (.12 cf)
.08 front ports plus .04 for interior port near side and .04 far side in chamber 2 (.16 cf)
.08 front ports plus .04 for interior port near side in chamber 3 (.12 cf)

i got 7 X 5 1/4 X 3 1/2
.074435763888 per sub
.14887152777 for both
 

Gold Member
Username: Insearchofbass

Post Number: 2563
Registered: Jun-04
two two inch ports id 14.50 long each chamber 1 2 and 3 and in each interior areas
 

Gold Member
Username: Insearchofbass

Post Number: 2567
Registered: Jun-04
as directed above
 

Silver Member
Username: Rzarector

Coquitlam, Bc Canada

Post Number: 329
Registered: Dec-04
what did you just say?
 

Gold Member
Username: Insearchofbass

Post Number: 2570
Registered: Jun-04
those are all measurements of three chambers with cubic ft. and individual tuned ports there is two total ports on the front of each chamber using 2 inch pvc 14.5 inches long each and two ports using 2 inch pvc 14.5 inches long each internally joining chamber 1 and 2 and then another two ports using 2 inch pvc 14.5 inches long joining chamber 2 and three

there
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