F N LO Posted February 6, 2007 Report Posted February 6, 2007 does this sound right guys, or look right, i know its paint but its the best i got.... 5.5^3Ft, tuned to 32hz, port dimensions, 5x14, 24'' long.... its only 2 PG, otctaner zr 12'' subs, they will be getting around 200wrms each.... is it to much cu.ft?? Quote
sean 371 Posted February 6, 2007 Report Posted February 6, 2007 Well at just a cursory glance, you want to cut the port width in half when its for each individual sub. basically, after they join it should be the full size, and half before they join. Quote A couple links to some box builds: Tahoe Box 1, Tahoe Box 2, Nissan Titan, VW GTI, Mini-Bump, Hummer H2, Ford F-150 My own car builds (current setup --- under construction): Overall Thread, Kickpods, Dash, Back Doors Subwoofer Wall
F N LO Posted February 7, 2007 Author Report Posted February 7, 2007 ok ill change that, Thanx,... i made it 5.5 because of the room i had and because the subs will take about .25^3ft, and the port itself sdo i figure ill have around 4.75 ft^3....does this sound sbout right to you guys?? Quote
AP Zoutes Posted February 7, 2007 Report Posted February 7, 2007 how tall is the port? x2 on what sean said and the port in your drawing is only 19.5" long not 24. Quote
F N LO Posted February 7, 2007 Author Report Posted February 7, 2007 ok, well the port will be 14inches high, visually seperating the box on the outside... but i would like them to share the airspace and port.. so what do i have to do with my port to get it right?? Quote
F N LO Posted February 7, 2007 Author Report Posted February 7, 2007 can anyone help?? i was hopeing to get this thing started today... Quote
07mazda3s Posted February 7, 2007 Report Posted February 7, 2007 Just find a program on the internet. I don't have any experience building boxes and I used a program for mine and I think it sounds great. I only have one 12 though, but its getting 500wrms, def loud enough for me. Quote Power Acoustik fubar 12 sony xploding amp 2 ft^3 box @ 35hz
AP Zoutes Posted February 7, 2007 Report Posted February 7, 2007 LIke sean said your port wall would stop at 2.5" away from rear wall that would give you 17.5" then go 6.5" at that point you port would be 24" long and 2.5" wide per sub Your port take's up .972 ft3 of airspace add that to your sub displacement 0f .25 and subtract from your 5.5 and you only have 4.28 ft3 of air or 2.14 per sub. What does PG suggest for airspace on your subs BTW with these calulations your box is tuend to 37.68HZ Quote
F N LO Posted February 7, 2007 Author Report Posted February 7, 2007 pg suggests, that i give 2ft^3 per sub... also how did you get that Hz calc. i used an internet one and thats what i got, what do i have to do to bring the Hz down, to like 32Hz?? so keep my port how it is but make it go back until 2.5'' from the back, and then 6.5'' out each side from that??or 3.25'' from the center out each side?? Quote
AP Zoutes Posted February 7, 2007 Report Posted February 7, 2007 make it go back until 2.5'' from the back, and then 6.5'' out each side from that ....YES Your hz calcutions were based on more airspace With how small your box is you would need a 48" long port to = 32hz..then your airspace would only be 3.35ft3 or 1.675 per sub Quote
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.