SPL & SQ / Fabrication

I got a box built for my 2 Funkin Audio 12" subs but something is wrong with one of them So I used 2 of my Mass destruction napalm's I had never used them before. I had the box built at 2.742 cubes ported to 40 for the funking audios the Mass destruction napalm seem to be doing ok and they seem very very loud.. My question is do you think they will be ok in this space or should I get 2 of something else like the BTL that is good up to 3 cubes.. I am running a xxx-6500d and they seem to be taking it ok I don't want to push them just yet as they are brand new. Open to suggestions don't want to smoke to new subs for sure.

Ok, this is giving me a headache... I dont know the exact volume of the box but it's somewhere between 12-13.5 cuft NET or it should be... This is what i've got and cant figure out why... I had a port 25.5" long that peaked at 50hz. I then had a port 22.25" long that peaked at 51hz I then had a port 20" long that peaked at 52hz I then had a port 18" long that peaked at 53hz I then had a port 16" long that peaked at 54hz The port extends through a double baffle (1.5" thick) and sticks out of the box 5" I always cut off the port length on the INSIDE of the box and retest. My peak frequency is 50hz. My LOUDEST port test was at length - 20" which peaks at 52hz but is loudest…

whats the max dimensions that will fit through a trunk of a mustang trunk opening... wiered ass trunks

Hey, I was wondering what the biggest box anyone has put in a WRX sedan through the trunk. I have a XXX 15 and I am having trouble getting big enough dimensions for a ported box to house the XXX. If anyone can help let me know. Thanks, Chief

I'm just about ready to buy a H-701. I have a pair of sundown sax-100.2's running dual mono to my Diamond d-971 components(~400 rms per side). I wonder if I should stay with the passive xover or go active... I have the capability to easily switch between the 2 when I get the processor. Also, I just got off the phone with Diamond, found out that the tweet is crossed at 850 hz, but he said that the woofer has no upper cutoff freq. If I do go active, Where should I set the freqs, I want to try and keep the tweet as low as possible to bring my stage up. Any help would be greatly appreciated.

how many sheets of mdf would i need for a 4.25 to 4.5 cu ft box for two 12's and 2 cu ft per chamber and a 30hz tune going to build a box tomorrow so please let me know asap

Can you order 1" MDF somewhere online? does home depot or lowes carry this? What about 1" birch plywood. I want strong but lightweight.

First qustion i no its pretty noob but to attach mdf together i predrill then add wood glue and screw in the predrilled holes correct. also i am trying to make my corners rounded where two piece of mdf are meeting also i got a ring so the sub would mount to and then i am going to attach it to the box so it will be flushed mounted do i do them as predrilling etc or do i need bracing heres a link to my build log so you can kinda see what i am working with My Nissan frontier build sorry about grammar and spelling been a long few days of fiberglassing

What material do you think is better to build with MDF or birch. I seen alot of builds using birch, but I have never used it. Does it hold up as well as mdf or better? What are the advantages of useing birch over MDF? Just want some input before I start building, thanks.

So my build calls for my 4" aeros to be about 38" long so I have to do some piping in my box with 90 and 45 degree turns. When measuring I'm assuming I stay in the middle the whole time and measure flare tip to tip? The turns are what throw me off when measuring. Thanks guys

i measured from the subs to where the mic go's and got 7' give or take an inch. so 7'x4=28' gives me the 1/4 wave devide 1131 the speed of sound by 28'= 40.39Hz so i port to 30.39Hz - with cabin gain should peek @ 40.39Hz but what about the ports fireing 90degrees out of faze, ??? subs are pointed forward into the back of the seat & the ports are fireing up along the back window line. i drive a 1988' Ford F-150 x-cab

Starting a new box build this weekend. I'm doing a slot port for this one. The box is 23" long with a 2.25" wide port. Need a 27" long port to tune. According to my math, the L section of the port needs to be 4" long. This assumes 2.25" from end of box to edge of long port length which I come up with 20.75. Taking center of port at 21.875 that leaves me with an L of 5.125 center. Subtracting back in 1.125 of center leaves me with 4". For end correction, I need to add back in 1.125 which brings me back to 5.125" L I've had a long week. Is my math correct? I don't design a lot of slot ports. Thanks! Dave

As many boxes as I built, my mind went blank today. I am trying to build a 30in long port with 1 bend. Do I measure in the center of the corner or along the inside port walls? Someone help a mind blank guy out?!

http://www.springshowdown.com/main07.html How many of you fools will be at the show? There are no shows in this area, so i'm glad that MECA is finally in this area. With that being said, all of the haters out there(you know who you are), don't start any negative comments

just as the title says, who all is going, I might be able to make a trip out, not sure though

Maybe its just me, but, i was just on their website and they didnt have any events posted in Cali....... anyone shed some light on this..

Here are the updated rules for MECA http://www.mecacaraudio.com/2009rulebook.pdf

Anyone have the meca world finals results? Just curious on how our shop vehicles would compare..

edit denim: temp. removed due to non members leaching, not cool but huge props to shane for being nice enough to post it up for us

ok so i cant read a tape for nothing so i got the guy across the street to read it for me on my box iv'e asked this questions a few times but never had the right messurement's but now i do here they are the depth is 22'5/8 the lenght is 41'1/8 the width is 22'13/16 i have two L shape ports the messurement are length 4'3/4 depth is 18'1/4 and the bottom of the L sape port which gose toward the center of the box is 10'1/2 remember i have two L shape ports one on each side of the box with the same messurement's now at the bottom of the L shape port where it goes toward the center of the box i have 5'1/2 from the L SHAPE PORT to the back of the speaker box these are all …

I was wondering if I could use metal L brackets in the inside or outside the sub box the reduce the vibration or flex? I saw the wood ones, but those take space inside the box and my box is quite small and I don't wanted any more smaller.

Finally found a TL at a show today! Got to run a sweep finally as well. I ended up doing a 154.9 at 39z in the scorching sun after demoing my car all day! I am happy with those results with 4k on my subs ..... Skar Audio is no joke

So i was metered today and this is what i got... 144.6 Outlaw under the floor @ 39hz and an oddity i scored 145 @ 39hz legal on the windshield The shop i was at thought it was quite odd that i was hitting higher in legal than i was outlaw. 15 fi bl on a saz-3000d @ 2 ohm

Hope this is the right section. Anyone in the Myrtle Beach/Conway area we are having a metering session Dec 8 at Carolina Audio in Conway. Call 843-455-9121 for info/directions. It's not a show or competition per-say because we won't have trophies or classes, and it's not really a show because there's no forms to fill out etc. Just stop by if you want to get metered on a Termlab for a good price. I hope I posted this in the right place because it was originally meant to be a competition, but we didn't get things really together in time and it's just not going to be big enough to have classes or trophies. Should be fun though, and get a nice offical T/L score without the l…

Hey All , so I've got an Termlab , RTA software also included , but there's no mircohpone when I ordered the RTA software it wasnt clear to me I needed te mirophone so I'm missing a piece , I can measure but Termlab selects the laptops own microphone this is FAR from ideal ! so I could order the termlab mic , but I was wondering if there are any preferably cheaper and "as good as" alternatives would Alpines mic work for instance ?