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View Full Version : 1 square inch of port???



MyFartsStink
03-15-2008, 02:44 AM
Well as you all know, the math on my first box was wrong, and the teacher at my car audio school did the math for it. Well as I am taking another class, he builds a box for another kid and its for a jbl power series 1224. 1 sq in of port :wow: And about 6" in length. :wow: He did all this to prove me wrong. It sounded ok, no port noise or nothing, but im sure it could sound better. Now I wanted to make a bet with him that a same amp with my sub in the box that he designed will sound like **** compared to my new one that I designed. Then he didnt want to do that, he wanted it so that we both do a build off to a different sub, so he knows that my old box is not correct still, but wants to be a **** about it.

jmanpc
03-15-2008, 02:46 AM
a 1" port is a hole :fyi:

DBDRAGGUY
03-15-2008, 02:46 AM
Car audio school?

adas
03-15-2008, 02:49 AM
Build a box for the kid out of cheap *** plywood and a couple braces, with proper port area and show that b!tch of a teacher you have up. His face would easily be worth the $20 to me;)

MyFartsStink
03-15-2008, 02:49 AM
a 1" port is a hole :fyi:

Yes I know I was shocked, he just wanted to do it to be a **** to me and prove some stupid bullshit to me.

MyFartsStink
03-15-2008, 02:50 AM
Build a box for the kid out of cheap *** plywood and a couple braces, with proper port area and show that b!tch of a teacher you have up. His face would easily be worth the $20 to me;)

I want to do it this weekend, but I got alot of hours of work to do.

DBDRAGGUY
03-15-2008, 02:51 AM
Yes I know I was shocked, he just wanted to do it to be a **** to me and prove some stupid bullshit to me.

What was it tuned to?

MyFartsStink
03-15-2008, 02:51 AM
You know what, im going to do it. Can someone help me design a box for this sub that will pwn this guy? Im not looking to pay anyone, but yet they will have the satisfaction of pwning someone.

MyFartsStink
03-15-2008, 02:52 AM
What was it tuned to?

I have no Idea, I just know what the length is and sq in is by looking at it. maybe 2 cu ft.

MyFartsStink
03-15-2008, 02:53 AM
I got 3/4 mdf sitting here, and im ready for this build.

Lakota
03-15-2008, 02:55 AM
What kind of ****ing education is that? I'd be pissed if I was wasting my money on that.

adas
03-15-2008, 02:56 AM
1.9 cu.ft and 35-40 sq.in. port area, tuned to 34hz should do very well:)

Or hell tune it for 36-37 it aint going to be testing chopped n screw *****

xtremebassjunky
03-15-2008, 02:59 AM
you in car audio school?

MyFartsStink
03-15-2008, 02:59 AM
Now is this 1.8 with or without port displacement?

DBDRAGGUY
03-15-2008, 02:59 AM
You know what, im going to do it. Can someone help me design a box for this sub that will pwn this guy? Im not looking to pay anyone, but yet they will have the satisfaction of pwning someone.

What vehicle you be testing it in?

Lakota
03-15-2008, 03:01 AM
I'd drop out of school before that place warps your brain.

MyFartsStink
03-15-2008, 03:02 AM
you in car audio school?

Yeah, its a joke to me, I hate it. I am taking a fab class and the teacher is 19, and he knows alot about fab, but still its not that great. I got a class for next month that deals with home entertainment, and alarm systems and smart house ****. The teacher in this class is actually old and knows alot of ****. I am looking forward to his class. He knows how much ohms a resister has by looking at the bands on it thats how good he is.

Lakota
03-15-2008, 03:08 AM
He knows how much ohms a resister has by looking at the bands on it thats how good he is.

Each color represents a number. The first two colors are the first two numbers of the resistance. The third color represents the number of zeros that you tack on to that value. The fourth is the tolerance of the resistor. Pretty simple really.

BrianChia
03-15-2008, 04:35 AM
I don't get it. What point was he trying to prove with 1 sq. in. port?

IgnoreMe
03-15-2008, 06:08 AM
I don't get it. What point was he trying to prove with 1 sq. in. port?

agreed. thats exactly what i was wondering

mazdakid
03-15-2008, 11:38 AM
and you are coming here asking for a design to beat your teachers box. if someone else makes a design for you then YOU still arent louder than him

hoss
03-15-2008, 11:45 AM
He knows how much ohms a resister has by looking at the bands on it thats how good he is.

thats not a measure of how good he is... that just means he knows a fact...

lots of people can do that. i remember in 7th grade science class we messed with resistors and learned the coding of the bands...

Immacomputer
03-15-2008, 11:46 AM
Um, you know that 1" squared of port would be a 1" by 1" hole in the box, right?

And yes, there will be "port" noise and if there is not, you're way out of the range of the port and it's just a sealed enclosure. I really doubt it's only 1" of port though.

MyFartsStink
03-15-2008, 02:05 PM
Well this older guy does know his **** though, I was just using it as an example because I thought the resister thing was amazing, but I guess its not. I looked at some of his work and he used more than 30 relays on this boat for actuaters, and some other cool ****. But as this box, it is 1 sq in of port and it is crazy as hell Ill take pics on monday and you will be shocked just as I am. He knows he can get more output with a better port, but he dont care about anyone but himself and wanted to pwn me with that box.

NeverEnuffBass
03-15-2008, 02:09 PM
19 and teaching a fabrication class? Where is this Acoustic Edge?

MyFartsStink
03-15-2008, 02:18 PM
19 and teaching a fabrication class? Where is this Acoustic Edge?

yep. How you know?

MyFartsStink
03-15-2008, 02:21 PM
The 19 year old is a cool cat, I have nothing against him. He knows his stuff on fab, And really knows his **** with interiors about how to sew and **** like that.

NeverEnuffBass
03-15-2008, 02:23 PM
yep. How you know?

See you are from Oklahoma I know that school is near there, I was gonna go to it

squeak9798
03-15-2008, 02:23 PM
yep. How you know?

Ask them if anyone there has passed elementary school English.

Seriously.

http://www.caraudio.com/forum/showpost.php?p=3513907&postcount=23

MyFartsStink
03-15-2008, 02:27 PM
Ask them if anyone there has passed elementary school English.

Seriously.

http://www.caraudio.com/forum/showpost.php?p=3513907&postcount=23

Lol. Well its been changed, I know that. but still :laugh:. But the only classes I see worth taking is custom interiors, and multimedia. Just an :fyi:

matrxx dude
03-15-2008, 02:30 PM
1inch port is just a hole that needs some glue in it to seal it off.lol

MyFartsStink
03-15-2008, 02:32 PM
well they put a peice of wood there to seal it up, and didnt sound different at all. Pretty ****** box I must say.

matrxx dude
03-15-2008, 02:33 PM
it prolly sounded better i imagine,sealed off

MyFartsStink
03-15-2008, 03:09 PM
it prolly sounded better i imagine,sealed off

It was the exact same.

PV Audio
03-15-2008, 06:49 PM
Any decent speaker with only 1 sq" of port area should chuffle like nothing else. Hell, one of my HT subs that's got 2 2" ports and only a single weak 12 has port noise at high levels.

PV Audio
03-15-2008, 06:50 PM
Yeah, its a joke to me, I hate it. I am taking a fab class and the teacher is 19, and he knows alot about fab, but still its not that great. I got a class for next month that deals with home entertainment, and alarm systems and smart house ****. The teacher in this class is actually old and knows alot of ****. I am looking forward to his class. He knows how much ohms a resister has by looking at the bands on it thats how good he is.:uhoh: You learn this in any basic physics class....

PV Audio
03-15-2008, 06:54 PM
It was the exact same.A ported enclosure that sounds the same as a sealed enclosure? :uhoh:

hoss
03-15-2008, 08:30 PM
A ported enclosure that sounds the same as a sealed enclosure? :uhoh:

it could happen with a retarded port. a 6" long 1" port would be tuned so high it wouldnt make a difference... it would be more like a controlled leak.

BrianChia
03-15-2008, 08:47 PM
Very small ports may act like aperiodic vented sealed enclosure. :fyi:

hoss
03-15-2008, 08:49 PM
dont use big words... just say they are for tards, thats what we like here.

BrianChia
03-15-2008, 08:51 PM
dont use big words... just say they are for tards, thats what we like here.

OK. But, aperiodic vents aren't retarded. But 1" ports are. :)

Canaan
03-15-2008, 08:51 PM
Wow...a 1" sq port.
So whats that, ~15hz?

I would have laugh in that guys face and make him feel like an idiot.

Got get a 4" flare, cut it to about 12" long, and stick it in a 2cuft net box.
Show him just how retarded that 1" port is.

Immacomputer
03-15-2008, 10:01 PM
If it really was a 1" by 1" square port that was 6" deep, it would be tuned below 20hz in an enclosure bigger than 1 cube. If it is tuned that low, the sub will act like it is in a sealed enclosure of that size. That's why it made no difference when they covered it.

Just like an enclosure tuned to 30hz, the port will aid in output around 30hz and about 1/2 octave above but anything above that and the port basically stands still like a piece of wood. It acts like another wall on the enclosure and the sub acts like it is in a sealed enclosure.

PV Audio
03-16-2008, 03:07 AM
it could happen with a retarded port. a 6" long 1" port would be tuned so high it wouldnt make a difference... it would be more like a controlled leak.
Even though you're right for the wrong reason, I fail at reading. :( It would be tuned low, not high.

Very small ports may act like aperiodic vented sealed enclosure. :fyi::D That is so more complex than it has to be, "it would work like an aperiodic enclosure" would have sufficed. :laugh:

80INCHES
03-16-2008, 03:26 AM
Yes I know I was shocked, he just wanted to do it to be a **** to me and prove some stupid bullshit to me.

well if thats thecase take the same sub and slap it in 2 cubes(after port and sub displacement) with 40 square inch port tuned to 35hz and watch u own him

80

MyFartsStink
03-16-2008, 03:25 PM
Yeah, but then again, they made flush panels, and I really dont give a **** no more. He is going to be out of my life in a month so its all good. And i was going to pay for the materials for the box I made in the class, but since he wants to be a **** about it, he is going to pay for it. He went too **** far.

hoss
03-16-2008, 04:33 PM
Even though you're right for the wrong reason, I fail at reading. :( It would be tuned low, not high.

i dont know my port theory that well :crazy:

i just know that shorter ports make the tuning higher, so i was guessing it was tuned high. one of these days ill figure this car audio stuff out :laugh: