I finally got it done! My 15 Type R's new home. 30.25x18.8x17" slot ported box tuned to 22 hz. It sounds low but my crossover's subsonic filter is at 32 hz. It finally hits really nice. The little box I had was definitely suffocating it. She sounds damn sexxy even with 300 rms going to it. Its not carpetted but it probably wont be because it was a mofo to get in and the look doesn't bother me as long as it sounds good I'm happy.
Only one pic for now. The cameras battery died as I took this pic. And yes those are gloves.
Thanks to Lnhiv for the box design and some good advice.
Now set the subsonic to 20-22Hz, and throw on a bass track that goes low. The way I designed it you shouldn't hit max excursion...iirc I made it so it would hit all the way down to 20Hz without hitting max excursion with the wattage ur pushing.
Good to hear it turned out well.
'03 Cavalier
DesertTuners.com
Just reread my design...set it to 22Hz.
'03 Cavalier
DesertTuners.com
boxes with no finish on them(carpet, paint etc.) are just as half assed looking as people who leave their wires all over the place. Just so simple and quick to carpet an enclosure, I don't see why people are happy with unfinished stuff. I also don't see the need to build a box tuned to 22hz.
On the other hand....you have other fingers.
In my family we teach that boys have a God-stick and girls have a Shame Cave. -John Stewart
22 hz LOL considered a fail
JL- Thanks for your opinion. Its not seen by anyone but me. I'm not showing the car. It functions fine. And it will get done eventually I just wanted to get it in for fitment then I was going to pull it sometime and carpet it but with the hell I went through putting it in. I'm considering leaving it. I'm beginning to think you hate me.
And the subsonic isn't adjustable. So really it doesnt matter what the box is tuned to. So honestly ya probably a bit of overkill but does it really matter since the crossover is there? I was told to tune to 32 hz before but with the crossover which is 32 hz any tuning below that doesn't really affect anything.
Actually it DOES matter where the box is tuned to... it matters quite a bit. Having the box tuned to a frequency your ears will probably not be able to hear, let alone a frequency the sub will never be hitting is hurting you.
I don't hate you, I just don't sugar coat stuff. If I have given negative feedback to you before, that is probably how it seems.
On the other hand....you have other fingers.
In my family we teach that boys have a God-stick and girls have a Shame Cave. -John Stewart
Yikes 22hz way too low. and 300rms way too low
And carpet it!!!
Other then that i like the sub
]:-> 287 TimeSlips In Hand. Car Still Runs Strong... 3 Differentials Later ]:->
22 hertz for the epic fail! Even for a groundpounder that's too low. Those subs like 35 hertz. You'll have to kill close to 1/2 the port to get it tuned properly, but then it's going to eat into your box size.
Its going up to 1000w rms Sundown I think when I get the money. But what I'm saying is that it isn't hitting anywhere near that low its pretty much stopping at like 28 hz but I did look around a lot for tuning and box space before I got the design and I even posted up and I got like one response about what I should tune to so I trusted it to Lnhiv. It doesn't seem to be hurting the sub at all but idk I'm not going to say I'm an expert by any respect but it made sense to me when I built it.
Most of the time you want to tune a sub box around 32-37. It sounds good musically. Anything lower is good for hairtricks. Anything higher is getting into tuning to the car for SPL.
It actually sounds pretty good musically. Since I have the crossover and I messed around with my head unit a bit. Am I running any risk of hurting my sub?
OK. we are not saying that you are going that low but tuning your box to that frequency is hurting its performance musically. Basically who ever told you that 22hz was a good frequency to tune the box to should rethink giving advice in car audio. Whoever that person is, really shouldn't be building enclosures for people who might not know much about audio, who think they are getting advice, or an enclosure from someone who really knows what he is doing. Knowing your way around a tape measure and table saw is hardly even half of knowing what you are doing to design a sub enclosure.
On the other hand....you have other fingers.
In my family we teach that boys have a God-stick and girls have a Shame Cave. -John Stewart
Ok Ill take what I have learned and apply it to future use. I'm always open to learning. Be expecting some PMs if I have a question cause obviously you know your stuff.
Don't PM me unless I run out of posts, there is never a reason to ask a single person when there are a few... although I will admit only a FEW people on the forum who will be able to help, probably even better than my stupid ass lol. I don't build enclosures. I know a lot about tuning them, why you build them a certain way, what you make them out of... but I have people do the measuring and building for me. Because they are far better at calculating the fine details and working their way around a table saw than I am. I am NOT the guy to PM about enclosures, like I said keep it in the forums, you will get a lot more help that way. Unfortunately, as you may have noticed, and as has pissed me off many times, you will also get a person who THINKS they know everything, but hardly knows anything that spews misinformation all around... One of the most recent misinformations I see is when a guy who seemed to have good interest in the hobby, good equipment, and even good woodworking skills was told that tuning the box to 22hz was the right thing to do. It might sound good to you, might even sound GREAT to you. But if that box were tuned correctly, I am willing to bet it would sound even better.
On the other hand....you have other fingers.
In my family we teach that boys have a God-stick and girls have a Shame Cave. -John Stewart
It probably would sound better. I don't know what it should sound like and I think thats my problem there's only one other serious system builder by serious I mean someon who doen't just throw together what they can get for 50 bucks and a rubberband and I don't ever see him anymore being as he graduated. If I got the gumption to fix tuning how would I go about it? Take the horizontal part out of the port and cut it down?
What's the length of your port inside? You'll have to shorten it to get a higher tuning.
The port is 31 in^2 by 46 in long.
I'm interested to know why tuning it higher would affect the the sound quality. I took a look at the frequency response curves again, and the only difference between the way it's built now, and tuning it to 30Hz is that it goes from being almost straight, to a 3dB spike around 35Hz. Then tuning it to 32Hz gives a 4dB spike around 37Hz.
'03 Cavalier
DesertTuners.com
Cut that port in half. It looks like it's 2 inches wide, so your port length would need to be 21 inches to be tuned to 35 hertz, and it'll sound a million times better. Lower tune has a super flat response, around 35 hz tune gives a nice peak around the low to mid 40 hz.
Sorry, meant 4 inches wide.
you could keep the tune as it is if you had some major midbass that was getting down to the 30hz range. if not i'd also suggest changing the tune on that box. and im also one that hates seeing uncarpeted boxes. its like jl said, you go thru all that work to make the box and then quit when your 90% there. people will see it. hell you posted pics on the internet. so tons of people have seen it.
http://www.flickr.com/photos/sndsgood/ https://www.facebook.com/#!/Square1Photography
what ever happend to reading the specs sheet that came with the sub to design the box? alpine puts a lot of r&d into their subs and the spec sheet (that i am reading right now as i have two type r's in my sts) states that 2.9 ft^3 @ 30 hz is optimum. it even gives you exact dimensions......
"I did it because I wanted to see what it would look like. You should be greatful that I even told you that it would look good. If your to dumb to use photoshop and change the color of your own car then you don't need to see it changed. I'm not going to give my work away. I'll sell the pic to you though for $15."-Adam Kalin
^^JBO is about not being that guy
i built a box at 2.5^3 feet tuned to 40 i believe for a 12" type r on an audiobahn 2200.... he did a 143?? iirc on the termlab..
http://www.jbodytuner.com
^^ The real jbody store!!!!!
y did u get a 15" type r thats ur mistake get a type x y get a 15" wen u can get a 12 to pound louder
joshua knaack wrote:y did u get a 15" type r thats ur mistake get a type x y get a 15" wen u can get a 12 to pound louder
I have no idea what you just said.
