As posted this is an experimental box and i give no guaruntees on how it sounds or wether it will have port whistle
(Triple chamber abc box)
2.50 28 hz larger chamber 14.275 port length using 4 inch pvc.52 port volocity at 1200 rms 1.25 39.88 hz medium chamber 14.275 port length using 4 inch pvc .37 port volocity at 1200 rms .625 55.61 hz small chamber 14.275 port length using 4 inch pvc .26 port volocity at 1200 rms
displacements for sub and ports will need to be accounted for also
(Triple chamber abc box) 2.50 28 hz larger chamber port volocity .15 at 54.989. port length 1200 rms 1.25 39.88 hz medium chamber port volocity .10 at 54.989. port length 1200 rms .625 55.61 hz small chamber port volocity .08 at 54.989. port length 1200 rms
displacements for sub and ports will need to be accounted for also
54.989. port length
ports are 12 high by wide 3.784 one per chamber plus one internally joining chamber 1 and 2 and one internally joining chamber 3 and 4
displacements for sub and ports must be accounted for