oldenglishD

stuffing is dampening so you answered my point. the one i outlined in the quote in red. so you would not dampen a box?? or change it's sd that is what you just did sir.

for one you have to use sd to either dampen or undampen a line. if the line is way to dampened in tradional sence it is considered way to learn with tight bass. port act completly different then a line and can be tuned in a way that is simulair to that of a ported in other words tweeked till you get spl or hard pucnchy bass kinda like a ported you go so big on the box and tune it to 28 to 33 hertz the note flatens out and becomnes boomy. ior smaller with a higher tune you get spl. now with a line you can make it peak changeing the sd larger or flaten it out by smaller number for sd this is all part of tuning a line. if he knows any thing he would no this and all he give is bs. btw i thought there was a rule about people postiong if they did not know what there talking then stfu.

bull like i thought !

Hope you weren't refering to me . point taken that this is stuff that's not for everyone , butt if noone would attemt these kind of things progress would never be made . I've got a box calculation program that alows me to tune horns and T-lines , and yes when you mess with length and the Sd of the beginning and end of the line ,altering powerhandling and response its is very possible it cant be called a T-line anymore , not saying it cant be done or cant lead to very loud enclosures (from experience). oh one more note , when designing a box a T-line rarely wins from a backloaded horn design (calculated). ya i know about the horns too but it's just a little hard finding good info on them. also all my books call it a tapered t line tapering it from 2.5 times sd to 1.25 times sd what the difference betwen minipulating the sd a bit and doing the same to port tung/ box size ? it's not like your not going to call a ported some thing else because you messed with it tuning/box sizefor the same alignment lol's so can you explain why it not a line or is it bs?

i know in sealed in my ranger the box subs forward sound better then up . but when you go ported you got to make sure your not going to push the seat up againt the port blocking it. this is why i always go port up subs up in my truck. so i will bump it to help ya out.

Yes, I had both kind of enclosures, Tlines, normal ported, and 4th order bandpass. The 4th order bandpass could get louder, because power handling is better then in a ported box, and Tline was waay more efficient then any of those boxes. so have i my ported old set up peaked 136 band pass about 137-138 db's and the t line about 142. of course it small subs peanuts if you will. thanks for the tip i was wondering if the watts would need less watts in a t line. answered one of my many questions.

thank you so much that is what i am thinking. the reason i am worried is it is a sae 1200d v.2 with the decrease x max in the 40 hz region would it require more power i quess the only way to find out is build and test like you say. if not i can find a bigger amp it may not be a sundown thought which will suck love sundown audio. it is going in a ford x cab truck. it is almost as small as a honda crx.

Thanks very friendly crowd i see.

Sorry as for goal it's spl. I just bought a mach5 audio spl 12 for the box it says 40-70 L at 38-40 hertz. and was wondering if it would do better in a line then a ported box but am unsure of it. I will be running it off a sae1200d for now till i can get a bigger amp maybe even two amps like the saz1000d strapped. thanks for the reply D

thanks always willing to learn maybe not in school but in life yes.

This kind of goes with myths and lies. Here I am trying to figure out why some insist on a port box for spl? Is there a specific reason why? Some pros and Cons I know of for ported verses transmission lines. Ported: High spl output= pro High x max =con Loud bass output. Pro Box size= pro or con Transmission lines: Loud bass output below 70 hertz. = pro Reduced x-max =pro High spl output the same as a ported. = pro Large boxes =con The reason I see the transmission line is better is x max is reduced so when you add 8,000 watt burp to a 2,500 watts rms sub the tinsel leads do not come apart as easily. The t lines can be tuned the same as a ported for high output. So why go ported? i was told this by some one that said glassing the inside of the box will increase output. just trying to straiten my self out on it thanks: D

new here with lots of questions