Originally Posted by passaturbo
Will bigger/proper size box for my woofer make it sound better.
And will going ported and increasing Cubic Feet x3 produce louder/deeper base.
you really shouldnt be expecting a person to answer the question without owning the subwoofer and trying it themselves.
the question is a per speaker answer.
i can say yes it CAN happen.. but maybe your specific subwoofer is the limiting factor.
any time you bring home a tool.. the tool will demand from you.
if you bring home a socket, that socket will demand nuts and bolts.. you cant use it as a screwdriver no matter how much you demand from the tool (unless you grind the handle to become a flat-head screwdriver .. but that is physically altering the handle)
its the same thing with a subwoofer..
you bring it home and it has demands that it will ask from you.
you cant change those demands unless you physically alter the voice coil.
you know something that does happen..
people need a wrench and they grab (or buy at the store) one of those groove joint pliers to twist the nut with .. when they really needed one of those adjustable wrenches.
it also happens..
people use a philips screw driver that doesnt fit the screw very well.
those who own a cheap drill bit set get those adjustable philips screw driver bits and they work really good when the size is perfect for the screw.
it boils down to what the subwoofer wants .. and you let the subwoofer demand what it needs, or you get a subwoofer that gives you what you need and demand.
because maybe the subwoofer plays more clear in the small box.
maybe it plays more clear in the ported box.
that is specific of the subwoofer, not the box.
if i was totally stuck with that subwoofer and forced to build a box for it to try and get the best i could out of it ... i think i would totally try this..
the minimum ported box size is 2.0 cubic feet
the maximum ported box size is 2.5 cubic feet
it doesnt say anything about the port size or tune.
i would build the box at 2.0 cubic feet .. and then make the port 0.5 cubic feet .. and it shouldnt fail because the given box size meets the 2.5 cubic feet.
what i dont know is..
will that box be smooth and flat in frequency response all the way down to the tune of the box.
maybe the box needs an equalizer to boost and cut some frequencies.
i would be using an equalizer anyways.
some people use the theile small parameters to input that data into computer software and build a box that fits the data .. and the computer software will tell you what the frequency response is going to be in that box.
i dont do it because i'm not heavily involved with building speaker boxes ... and the same question will come up ... does the owner need a flat response without an equalizer or do they use an equalizer that can help?
but i would still hold firm.. the first approach is to tune the box at the highest impedance point.
once you start to alter the port tune, you are building a box that is more advanced in terms of audio engineering.
and that could go as far as placing blocks of wood inside the box to alter the character of the box.
if you tuned the box lower than the impedance peak ... you might want to place a piece of wood in there that will help resonant the frequency of the impedance peak.
it is a multi-frequency tune that i would be after to get more than one 'correction' applied to the final result.
kinda like saying 'there is a hole here and a hole here'
and then building the box to fill in BOTH holes.
because sometimes people see 'there is only one hole if i tune it this deep.. and if i tune it any lower there is going to be two holes that need filled'
when they add the block of wood to help one of the holes, the entire size of the box needs to be adjusted to compensate for the block of wood.
and it might not be as simple as increasing the size of the box extra for the amount of space the wood block occupies.
you might need to find a compromised average between the two because of their interactions together, or because the box builder is trying to make smaller fine-tuned adjustments for the upper (or lower) portion of the frequency response.
i've seen situations where the amount of decibels coming from the cone was actually louder when it was sealed than when it was ported.
it is because the voice coil would rather shake the cone within a millimeter to produce output compared to the cone moving in and out half an inch.