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Triple Chamber 4th order


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Anyone with experience in 4th order enclosured please help.  

 I have designed this box for 4-10" db drive ewx  

front chamber that will be the middle is 1.151^3

rear chamber on each side will be 2.0827^3

port diameter 8"

port length 25"

tuned (FL) 28.89

Tuned (FH) 86.12

 if this looks good let me know, if not please advise.  

 

PPI dbl din
DC Level 3
1.77cubes net tuned to 33htz.
DC audio 2.0k
CT Pro Audio 8" in front, 6.5 in rear






dc_audio.jpg

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So you are looking at about 4 cubic feet total for the sealed chambers and about 1.1 cu ft total for the ported chamber, is that correct?   Those numbers would be pretty unconventional for a car audio bandpass box.  Usually the ported chamber would be much larger than that.  

 

How much power are going to be running?  Do you have any specs on your subs?  I hit google up but I wasn't able to find anything.  

"Nothing prevents people from knowing the truth more than the belief they already know it."
"Making bass is easy, making music is the hard part."

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i know it sounded weird to me also  i thought the normal rule of thumb was 2/3 middle chamber and 1/3 for each sealed chamber.  since it will be 3 chamber.  the 1/3 will actually be 1/6.  

sub specs  Power for now will be a 1250.1 A7M  but plan on getting another one or a larger amp like a DC 2.0k to 3.5k.  

Resonant Frequency (fs) : 41.9Hz
DC Resistance (Re) : 7.2 Ω
Mechanical Q (Qms) : 6.43
Electromagnetic Q (Qes) : 0.78
Total Q (Qts) : 0.70
Compliance Equivalent Volume (Vas) : 12.3
Mechanical Compliance of Suspension (Cms) : 0.06mm/N
BL Product (BL) : 23.6 N/A
Diaphragm Mass inc. Airload (Mms) : 229.1 gr
Sound Pressure Level (SPL) : 82.5dB
X-Max : 16.76 mm

If this dont work out I might just wall my kia soul c-pillar and just port that hoe out the top.  and go with 6-10" subs.  

PPI dbl din
DC Level 3
1.77cubes net tuned to 33htz.
DC audio 2.0k
CT Pro Audio 8" in front, 6.5 in rear






dc_audio.jpg

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