i'm pretty sure there's no way 2 slot ports are going to displace less than one large slot port (assuming they both tune the same), but i could be wrong.
i was just going to use one big slot port because:
more port area, gaurantee no port noise (my two 4" port idea might not be enough port area)
easy and cheap
alright, check these 2 plans i did...:
they have the exact same external dimensions,
width: 37"(35.5")
height: 16.5"(15")
depth: 18"(16.5")
wood thickness: .75"
but with 1 slot port i can make it only 3.3cu.ft NET(sub in the enclosure) @32hz with 40inch of effective port length
instead...
with 2 slot port, im able to squeeze 3.8cu.ft NET(sub in the enclosure) @30hz , each port having 20inch of effective lentgh
pics speaks for itself...
AND, i still have 60sq.inch of port area( (15x2)x2 )
only thing is I dont know any disadvantage of 2slotport, did someone already build a 2slot port enclosure and tell how was it, any port noise, weird sound out of it..etc?
thx yall