ncc74656 Posted June 25, 2013 Author Report Posted June 25, 2013 guys at the auto store said they had a suction device that was used to hold onto heavy objects and they picked up 3 pieces of MDF through one another with it. it was using this reasoning that they recommended i at least paint the inside of the box to prevent air escaping. nothing, gutted
Amart88 Posted June 25, 2013 Report Posted June 25, 2013 guys at the auto store said they had a suction device that was used to hold onto heavy objects and they picked up 3 pieces of MDF through one another with it. it was using this reasoning that they recommended i at least paint the inside of the box to prevent air escaping. That's funny because I can pick small portions up with my shop vac. Most people paint or resin for a smooth surface and looks. My 2005 s10 blazer build. 4 zcon 18's walled.
ncc74656 Posted June 25, 2013 Author Report Posted June 25, 2013 hmmm... i will search more into this i think. im on the fence if i want to paint or carpet the outside from a CNC white page: "MDF is permeable and as such it lets air pass through its entire surface." it goes onto say the amount of air passed through varries by mfg. so the question is not "does air pass through mdf" but rather "does the air that passes through it have any effect when used in a ported box? nothing, gutted
Amart88 Posted June 25, 2013 Report Posted June 25, 2013 hmmm... i will search more into this i think. im on the fence if i want to paint or carpet the outside from a CNC white page: "MDF is permeable and as such it lets air pass through its entire surface." it goes onto say the amount of air passed through varries by mfg. so the question is not "does air pass through mdf" but rather "does the air that passes through it have any effect when used in a ported box? Dude. Don't worry about it. Anywhere where there is double layers the glue would seal it anyways. Once you paint it it will be even better, My 2005 s10 blazer build. 4 zcon 18's walled.
ncc74656 Posted June 25, 2013 Author Report Posted June 25, 2013 i now have 0ga from alt to battery and i no longer have a voltage drop from the alt to the batteries. the sub sounds off to me and i just put my box maths into torrez and i see its a 7.5 cubic with a 36.29 tune. so let me know if on off base here but would removing .4 cubic give the sub a tighter response? if so i will add a double bottom to the inside of the box and extend the port down 5" (its currently not bent) to give it a 35hz tune. does this sound like a good plan? nothing, gutted
ncc74656 Posted June 26, 2013 Author Report Posted June 26, 2013 i added .19 internal bracing of the bottom of my box, removed the horizontal pole connecting the two sides in favor of all thread and extended my port by 4.25" giving me a 35.37hz tune on the sp4. the amp no longer cuts out after all new grounds and upgraded alt power wire. however the sub still sounds like its missing something. i feel like its high end but maybe i cant fix that? i came from a Fi BL tuned to 44hz so now that im tuned to 35 i hear the songs higher bass notes (wich there are a lot of) are just hollow and empty. almost makes me want to buy a second amp/sub and tune it high to fill the gap. could my port be to large or to small? its 3.62" tall and 30.25" wide. 108.92 square inches and a 1:8.4 ratio. here is what i changed: http://imgur.com/a/ZfYip nothing, gutted
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