77-AUDIO Posted July 28, 2017 Report Share Posted July 28, 2017 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 dinDC Level 31.77cubes net tuned to 33htz.DC audio 2.0kCT Pro Audio 8" in front, 6.5 in rear Link to comment Share on other sites More sharing options...
Triticum Agricolam Posted July 28, 2017 Report Share Posted July 28, 2017 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."Builds: Link to comment Share on other sites More sharing options...
77-AUDIO Posted July 28, 2017 Author Report Share Posted July 28, 2017 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) : 41.9HzDC Resistance (Re) : 7.2 ΩMechanical Q (Qms) : 6.43Electromagnetic Q (Qes) : 0.78Total Q (Qts) : 0.70Compliance Equivalent Volume (Vas) : 12.3Mechanical Compliance of Suspension (Cms) : 0.06mm/NBL Product (BL) : 23.6 N/ADiaphragm Mass inc. Airload (Mms) : 229.1 grSound Pressure Level (SPL) : 82.5dBX-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 dinDC Level 31.77cubes net tuned to 33htz.DC audio 2.0kCT Pro Audio 8" in front, 6.5 in rear Link to comment Share on other sites More sharing options...
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