PDA

View Full Version : Will this port design work?!



Psyence
10-18-2005, 11:49 PM
Argh, Still pluggin away with my port, and i have a question for people that know somethign about ported boxes...

Would this slot port design work, so that I have space to make it longer?

http://battlepsyence.com/port.gif

?

PV Audio
10-18-2005, 11:50 PM
wtf angles

Psyence
10-18-2005, 11:50 PM
Its custom to fit a certain place.

PV Audio
10-18-2005, 11:55 PM
ahh gotcha

Psyence
10-18-2005, 11:56 PM
You must have some input, you design boxes...

Would that idea work ok?

PV Audio
10-18-2005, 11:57 PM
well i mean it will work, but i dont' know what i'm really looking at. i have no idea as to the dimensions. in all actuality, with that strange of a box, a round port may be better.

SSS 18734
10-18-2005, 11:58 PM
as long as the port is the correct size, and the box has the air space you need, you can make it any way you want.

tommyk90
10-18-2005, 11:59 PM
Why not just run it angled along the back wall?

80INCHES
10-18-2005, 11:59 PM
with a design like that u will have a couple of standing waves inside the box...i suggest u round all your corners and angles...and u should be fine..as long as the sub is getting its proper air space ...u should be good

80

Psyence
10-19-2005, 12:00 AM
Omg, Im gunna kill myself then... Ive been screwing around for 3 days with different port sizes, etc...

Well, I guess trying that wont hurt either.... Hope it works!

So let me double check something else...

I have it at 38hz or so right now, it gets loud on certain songs with not so runbly bass... if I tune to 30-32hz, I will get the low end better?

Psyence
10-19-2005, 12:01 AM
Yeah, its 2.5 cubes, without the port in place... so by time I factor that in, im at about 2.3cuft or so.

SHould be alright.

PV Audio
10-19-2005, 12:02 AM
yes...i'm just saying about the port (without even knowing wtf that is lol), if you are going to have it suspended, why not break it at the required length and use the baffle or panels as the port wall?

SSS 18734
10-19-2005, 12:02 AM
it will more than likely be noticeable during deep bass hits, but it's not going to be a night and day difference.

Did you consider using round ports? it would make your like 10x easier

PhatTonyDeMarco
10-19-2005, 12:02 AM
Omg, Im gunna kill myself then... Ive been screwing around for 3 days with different port sizes, etc...

Well, I guess trying that wont hurt either.... Hope it works!

So let me double check something else...

I have it at 38hz or so right now, it gets loud on certain songs with not so runbly bass... if I tune to 30-32hz, I will get the low end better?


Yes, tuning lower will boost the low end much better, however you will lose a bit of output. That low of tuning is normally for SQ, shoot for 35Hz or so, I had that for my two 12's and I listen to rap and it sounded awsome.

Psyence
10-19-2005, 12:03 AM
Well now that ive hacked the hell out of the top making ports, i cant really switch to round... cause the hole is 2" x 10" now...

Psyence
10-19-2005, 12:04 AM
It seems like I cant get it both ways... Right now at 38hz, it plays techno great, at 30hz it played rap great... but I havent had one that sounded all around great... I mean it sounds ok, just not enuff output on certain types of music.

PhatTonyDeMarco
10-19-2005, 12:06 AM
It seems like I cant get it both ways... Right now at 38hz, it plays techno great, at 30hz it played rap great... but I havent had one that sounded all around great... I mean it sounds ok, just not enuff output on certain types of music.


It never is... Sealed is really the only enclosure that will have a generally flat response with all music.

Psyence
10-19-2005, 12:07 AM
So basically, I should shoot for around 33-35hz to get the best of both worlds, or as good as its going to get...?

JeffyZ33
10-19-2005, 12:09 AM
Go for around 34-35hz :p:

Psyence
10-19-2005, 12:10 AM
Well I had the same sub, on the same amp, in the same size box, different ports... The Original box is just a cube basically, standard box, but it just looks like *** in my back seat, so ive created this thing, and now I just cant get it to sound anything like it WAS.... I dunno if its the port 100% or if its the angles, or what.

Its driving me nuts, I almost just wanna start over... but my wife will murder me if I spend another day on this, haha...

Psyence
10-19-2005, 12:12 AM
This is for a Type-R 12"...

Is this box too big for this sub? 2.3cuft? Would I be better to close off that bottom part where the 90degree angle is, and make it around 2cuft? -- and eliminate standing waves?

PV Audio
10-19-2005, 12:13 AM
2.3 Vb, or 2.3 total..

JeffyZ33
10-19-2005, 12:14 AM
I say run the port along the back wall. All of the 180s in that will kill you.

Just try to round off all the edges and make the inside as smooth and free flowing as possible (meaning no sharp angles, etc)

If you have to, resin it up to get it flowing smoothly.

Psyence
10-19-2005, 12:15 AM
2.3 Vb, or 2.3 total..

Its 2.50 cuft internal volume w/ sub displacement included, but not port displacement.

JeffyZ33
10-19-2005, 12:19 AM
Here's an idea, and shows what I mean by making the angles less extreme.

http://img.photobucket.com/albums/v258/FlashLCD33/port2.jpg

PV Audio
10-19-2005, 12:20 AM
true but he's losing Vb not just with the wood, but the air behind it [45s]. this is needless to say that it seems he's already having space issues..

Psyence
10-19-2005, 12:24 AM
I dont think there is a space issue really, I mean the manual only calls for 1.75cuft... and i got 2.5 without the port...

Also, on the bottom, there is a indented part to go around the seatbelt thats for the seat that was taken out, that is unfortunately attached to the seat that is beside this one ;) If that makes sense...

I cant have the port run along the back, thus the reason im asking that the u-shaped slot port...

I dunno what the heck i should do, i mean this box LOOKS sweet in there, but I just need a better sound from it. I mean it sounds OK, but not GREAT like it used to.

JeffyZ33
10-19-2005, 12:28 AM
If you have .75 cubes to play with, make it nice and smooth and free flowing.

Psyence
10-19-2005, 12:29 AM
Well from what ive read/heard in the Type-R threads, 2-2.5cuft is what people are using... I mean, I could do that, and not loose a lot of space I dont think...

I guess its worth a shot... maybe this is why the output isnt so great... what would hte angles do to the sound?

PV Audio
10-19-2005, 12:40 AM
ahh, i thought that alpine said 2.25~ is optimal
cause i can tell u that with lots of 45's and the port
its gonna be smaller

JeffyZ33
10-19-2005, 12:48 AM
ahh, i thought that alpine said 2.25~ is optimal
cause i can tell u that with lots of 45's and the port
its gonna be smaller

Obviously it's going to be smaller, but he has a lot of room to play with it sounds like. Hard part is going to be figureing out how much each displaces and adjusting the port accordingly.

PV Audio
10-19-2005, 12:59 AM
*blank stare* exactly what i said in the first place when i suggested round ports