should i always put stuffing inside a speaker box? if so what kind?
this is for a car audio application its a square kicker L7. i used winisd to help design the box it is 6.2 cubic feet with a 24 inch long port.
i am using 3/4 MDF and i was also wondering if i could get some advice on the port. i was wondering if i use 3/4 for the outside do i have to use 3/4 for the port as well? i was hoping to get away with 1/2 or 5/8 to save on space because these boxes are already so big.
this is for a car audio application its a square kicker L7. i used winisd to help design the box it is 6.2 cubic feet with a 24 inch long port.
i am using 3/4 MDF and i was also wondering if i could get some advice on the port. i was wondering if i use 3/4 for the outside do i have to use 3/4 for the port as well? i was hoping to get away with 1/2 or 5/8 to save on space because these boxes are already so big.
I don't put any kind of "stuffing" in my sub boxes, subjectively I thought it slightly reduces output ,objectively i have A/B'ed with a spl meter and it is slightly less output, with consistent drive levels. I do however use it in my mid boxes, smoothes out the peaks.
i was told that it gives the simulation of a larger box. but i was thinking what if i just build the box to the correct size? so its why i was asking i was a little confused as to the purpose of stuffing
also what about my port do you think i can use a thinner piece of mdf to save on space?
also what about my port do you think i can use a thinner piece of mdf to save on space?
I would build the box to exact sim volume minus port and driver volumes, the virtual volume gained thru stuffing is dependant on material, density ( 1 / 2 / 4 pounds per cu.ft) and total internal volume occupied by the stuffing.
Most estimates say between 15-25 % theoretical vol. gain. As well ported and closed boxes have different recommended stuffing density levels. Putting too much in a ported box could change the tuning characteristics and introduce uneven response.
Anyways I use Johns Manville (white) fiber glass, and yes 5/8 " would work as long as no dimension gets too large to become vibration prone, I usually brace my rectangular ports into long narrow by splitting it into 2 or 3 depending on the width.
Most estimates say between 15-25 % theoretical vol. gain. As well ported and closed boxes have different recommended stuffing density levels. Putting too much in a ported box could change the tuning characteristics and introduce uneven response.
Anyways I use Johns Manville (white) fiber glass, and yes 5/8 " would work as long as no dimension gets too large to become vibration prone, I usually brace my rectangular ports into long narrow by splitting it into 2 or 3 depending on the width.
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