SPL & SQ / Fabrication

I'm more of an aspiring SPL guy, I don't know it all but I know a fair deal, regardless thats my personal focus. SQ is pretty much new to me, but I've got a guy with a 250 wanting a competitive SQ car a local shop is wanting to charge him out the rear in labor, I'm pretty confident I could do whatever needed to his truck. I'm just curious where to go with it. It sits now with Focal K2P doors, Focal Access rears, Alpine 4.150PDX amp, 2x12" Pioneer slims behind the rear seats powered by a PDX 600.1 and a JL 10" woofer in the center console powered by a JL 250.1 amp processed through a Kenwood DNX7100. He wants to move the K2P fronts to the rear and put focal utopia 3 ways …

a box's internal dimensions - 10.5" high 35.5" wide 20" deep If i put a port in it width-wise, slot port along the wall, 10.5" high x 4" wide, and run it across and leave a 4" gap from the wall resulting in port length being 31.5" long + 0.75" for wood thickness exiting box... When i calculate port displacement, do i find the cubic volume of 10.5" x 4.75"(plus thickness of wood) x 31.5" or 10.5" x 4.75" by 35.5" ? Do i take into account the effective area around the port too? because if i do then i would choose the 2nd option above as part of the displacement.

Hi, i have 2 offers for subs one is for 1 mt 15" quad .7 for about 300-325 and the other is for some 10" xsite D4 which i was thinking to get bout 6-8 for 28 ea. so...which should i get?? i want spl btw i dont care much bout sq... edit: i have a SAZ-1500d and planning on getting a 2nd one

i did a 149.0db Sunday with 1 sub ported to 36Hz going to build an SPL box for it now and get over the 150.0db mark with a singel sub Jacob i am out of Flyers need more as everyone is wanting info SounsStream 15"XxX

Hello am from mexico and I want to know if anyone can recommend that woofers used to compete in spl stret beat and uses a pair of 3000.1 sundown in a car renault R5 Thanks style_team 150+

in a hatchback, anybody personally experienced a setup where the subs were within 3.5" from the glass producing over 2,000w of power? Is there any danger or am i worrying too much?

ok so i woke up today with spl on the mind, i called my local stereo shop that i once worked at, i requested a termlab run, the man told me it had not been used in 4 years, and didnt know how to use it even if it worked, he was worried about the mic, he said that maybe it had to be adjusted, or tuned, i dont know anything about that, but it said it could take weeks, i wanna see where im at on the scale, im also intrested to know where i would be at in SPL class, i have a car with a trunk and thats where the subs are at!.. no none walled, saz 3000d 3 yellow tops and 2 15's and my system sounds better with the windows down... is that outlaw? i dont know much about …

I have a lot better success in making 1 single run with the port if i side fire rather then fire back. I prefer not to have to bend the port(s) is why i am asking if there is anything "off" sounding to this. My max square dimensions in cargo area is - (for this height) 42" wide x 12" high x 24.25" deep. If i were leave a 7" gap in the width to allow air to escape out of the box and shoot up towards the car, i would then have- 35" wide x 12" high x 24.25" deep. At the very back of the box on the side, i would, for example, have a 10.5" high x 4" wide port. I'm assuming i should have it as far back in the car as possible when side firing. If i choose to side fire, should i …

I've thought about doing this and recently seen someone actually use this method but never commented on how good it was. In instances where all-thread cannot be used.. how about running those flat steel bars that Lowes sells on the inside of the box? Those are humanly unbendable.... it's steel. I was thinking about running those, gluing them to the box, drill out contact points, maybe 1 every 12", run bolt through to the outside, threadlock it and use a large washer on the outside of the box with a nut of course. Seal around the steel bar. These bars, if i am not mistaken, are only like 1\8th" thick. Shouldnt' that make the wall it is attached to hella strong? I see n…

I have designed a box for a friend of mine. He also has an 86 F150. He heard my system and wants to use my type of subs. The pioneer TS-SW3041D. I have designed a box for him and just wondering if it will be optimum for the speakers. Heres a quick drawing i did in paint: Can someone here that has a proper box building program plug the specs in and tell me if this box would be good to use, or that i should start back over. Any and all help with be greatly appriciated. Thanks in advance, Scott

This may come out the most newb question on earth. When running multiple woofers, do you need a amp that is ratted to power the RMS of each woofer or both woofers? In my case, for 2 btls, to run both off one amp do I need a 4,000RMS amp or a 2,000RMS amp? or should I just be looking at individual amps like strapping 2 sundown 1500s together? I've been looking at the sundowns and the rockford 2000 and 4000 amps.

What is a 4th order & 6th order Banpass ? anyone have a diagram ?

Has anyone tried this when they were bored or may just know what happens if you take a ported box and install 2 ports in the box, one tuned to let's say 30 hz and the other at 45 hz. I'm just curious as to what happens. Does the box react as if there is a major air leak? Do the port's tuning medium come into play and output a tuned frequency of 38hz for this example?

Here is the car and the current sub : He's planning adding one more woofer and competing in espl, something similar to bass race (track chosen by the judges). Basically, I'm looking for some ideas on woofer and port orientation from the ones that have some spl experience Right now his top score is 144db @ 36hz, db-drag style, using a single 3kw Ground Zero 1.3000 and one 15inch 4hp clone by Ground Zero (Plutonium 15). Final gear will be 2 subs and 2 Atomic 5000.1's. What port and woofer orientation ideas do you guys have ? Even some tips would be really nice

Whats up guys...Heres a box I finished up yesterday. It is a transmission line tuned around 31Hz. Right now there is an EHQS 12 (SVC 4 ohm) in there. Amp is a JBL CS200.1. Rated at ~200 watts at 4 ohms. As for how it sounds...FUKIN AWESOME. The tonality is a lot different from the 2.5 cu ft @ 30Hz box it the EHQS was in and output is a lot higher. This thing digs deep and has usable response down to 25Hz testing with sine waves...below that it unloads and doesn't have much output. It has a pretty flat response from 28 - 60Hz. I really love how it sounds. It's easy to tell when the EHQS is reaching its mechanical limits as I can hear it bottoming out but that is…

So the time has come to finally make my box as work has slowed down and my carpenter (father) has some time to help me get a enclosure made for my pair of RE SX 15's. My major dilemma here is that the opening for the trunk limits the size of the box to be rather small compared to the trunk size unless i do one of two things... Option 1, Build the box in 2 halves then screw together inside the vehicle. Other then volume taken up for the small 2 inch border around both halfs of the box i plan to connect them with, what other problems could the pose for the sound of the box? I'm able to get like 12 cubes into this trunk if i am able two to part this box... Option 2, Build th…

I've got these comps installed in my jeep with the tweets mounted on the doors @ the front corner of the window. As of now I'm running a reference 500 to them but plan on switching amps in the very near future. even with the crossovers @ -6db the tweets sound way too high and ear piercing. Does anyone have any experience with these comps? Any suggestions on making them sound a little better?

s10 blazer. i have 6.5 door space tweeter space in dash.if i added another set of comps in the kick panel would i wreck my sq. just wondering being that one tweet in dash one down in kick. how about comps in kick panel and use the door for just a 6.5 mid

if ny one has ann ideas for a box design that would be helpful please post them!!!! i need a good idea for the SPL competition!!!!

Okay, Im not much of a box-builder. Nor do I know any of the concepts to box-building. I was wondering for my MAW-15's, Which I'm putting in a 4.0 ^3cu. ft. box sealed, When I get the box built does it need to be two independent chambers with 2 cu ft on each side or 1 big 4 cu ft. box. I wasn't sure what if that had an effect on the subs and/or their performance. Thanks in advance. ~MadroX

I've got a 91' honda prelude, and I'm going to try and use as much of the trunk as possible for a pair of 12's, rather Fi BLs or Fi Qs. I'm thinking of firing the woofers up at the trunk lid or against the back of the trunk, and having the port vent through the trunk opening into the cabin of the car. I've heard how horrible sealed boxes sound if pointed through the trunk into the cabin, I'm just curious if the port would create such a horrible effect. I'm building the box to pretty much use all of the little space I have, so there is nowhere else for the port to be free of obstruction. What do you guys think?

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.

okay new here and was told that you guys could definitely put me in at least a general direction. here goes I have a customer who had three 12" L7's powered by 3 hifonics bx11200's in the trunk of his 96 J30. the box it self was a sealed, non-separated, box that was just big enough to wrap around the woofers and fire at the rear with the box jutted up against the gas tank that resides there. he is asking if there is any way to build a box that would be noticeably louder yet still retain the punch of such a constrained box. he doesn't mind the loss of his trunk so but the real challenge is figuring out how to get the sound to penetrate through the obstacles within the trun…

i designed a new banner for 08' i used car show twice ill fixx it later

http://www.termpro.com/asp/members2....&MemberID=9878 Some more info about the show Taken from bill Address The address listed in the link and in the previous posts is at my "shop" garage/ house right across the street from the n.tonawanda police station there is plenty of street parking ,this will be an outdoor show ,the garage will be open and the judging table will be just inside. there will be plenty of room for head to head competition in 2 lanes at the same time. Trophy's: We will have a trophy for loudest of show and certificates for all other competitors along with 2008 points for finals ALTHOUGH IF THIS SHOW CONTINUES TO GET BIGGER .......the location might …