chava
Junior Member
Can some one help me with a box dimensions im trying to build a box dat messures 48lx25dx20h tuned to 33 htz
that seems way too small to be for an 18 along with being tuned high too.25*25*18 with a port 16.5*3.25*17
With torres i'm getting 37hz at 4.3 but i added a 2nd baffle so that took some space and moved the tuning up. Without it, i'm getting basically the same numbers as you.OH **** I though it was a 15..That box is 4.45 tuned to 36(with the slot port calculations).. Using bbpro with two flush ends and adding 1/2 the width of the port to the length I get 36.88.. What are you getting?
Never said you were wrong lol. I assumed that first post was just a typo meant for a 15 too. I got similar numbers too with that one so yes BBpro is accurate. However your port area is on the low side of things and i'd try to account in 2ndary baffles, bracing and sub displacement.My hdc3 15 didn't really like to be tuned under 36..Seeing as the 18 4.0 after break-in is probably closer to a fs of 36 I would times it somewhere around there as well. If you want more lowend increase box size or port area..
I'd say 37*20*25 with a port 4.25(internal)*18.5*12 gives me 8 tuned to 36.. Do I have to break out the formula and do the math? I know bassbox is suppoesr to be accurate no?
yeah soft parts arent that great, though my level 5 soft parts arent that great either. For the time I had them, the HDC3s did a pretty good job playing all the musical range i want from decaf to rock/metal when i had it and it get pretty loud to do shirt tricks from basically a D pillar no wall minivan. I just moved on from them. My dc level 5s got a lot louder even on less power at 2 ohms. Still going to have to change up the box a little bit reducing the port area and lowering the tuning for these level 5s down to 32-33hz.good info though.. last 18 i own was the orginal XXX with the XBL.. loved that driver.. i think i used right around 7 cubes with 80in^2 tuned to 32..normally with a very stiff spide you can get away with A a larger box for increase efficiency or 2 larger port and decrease box size to help load the driver abit but i didn't think 6.5.
the few woofers i built where built around the more linear techniques/materials possible. also taking in mid parameter shifts from not only operating temperatures but when applying it in excess as well. generally id use a slightly stiff suspension for the high mass drivers as long as i could maintain a QEs lower than .55 while keeping the FS just a bit below intended bandwidth.
how you like those HDCs? i honestly didnt care for mine.. i reconed it with parts i had lying around and now shes better.. lol..