IDEAS FOR SINGLE 15"

[BOSSV6]

Well the name says it best. i have a single 15" P3 woofer going into my car and i need a place to put it. so far im just doing to build a mdf box in my trunk and have it on an angle at the top and the sup sitting there airing into the car. im going to start off sealed. but if i dont have enough bass ill go to a ported design. any ideas on how to start? easy ways to build it? thanks guys

[CAMAROWIDBASS]

you do have enough space to go ported, what type of amp will you be using to push it? Dont P3s handle over 1k rms?

[BOSSV6]

I have a kenwood excelon monoblock. 1040RMS @ 4ohm
I could blow the 15 with my amp if i wanted to. and the ported room is no issue, im just going to try the sealed and see what kind of numers i get. im thinking ill get around 120db sealed and im hopeing around 140 ported. but we will see

[96firebird311]

Originally posted by CAMAROWIDBASS:
you do have enough space to go ported

Like hell he doesn't.

im thinking ill get around 120db sealed and im hopeing around 140 ported. but we will see

Those are horrible guesses. :D A better guess would be 143db sealed and 146db ported. Probably around 53Hz. Not exactly sure what your looking for from us. Not a whole lot of pointers.... measure twice and cut once? Make sure your box is sealed well?

[Big Tymer]

Originally posted by BOSSV6:
I have a kenwood excelon monoblock. 1040RMS @ 4ohm
I could blow the 15 with my amp if i wanted to. and the ported room is no issue, im just going to try the sealed and see what kind of numers i get. im thinking ill get around 120db sealed and im hopeing around 140 ported. but we will see

hhahahah wow, that sounded like it came from some ricers mouth.... lol 120? lol, I hit 125 with some cheap *** 20 dollar pyle 12".. porting a box will not make it go 7 times louder, ( 3 db is "twice as loud" ).... your guesses are wayyyyyyyy offf...

[BOSSV6]

jeeze, my apologies for sounding like a ricer. and making an obscene guess. I have never done any sterio compitition stuff befor and i really dident know. i was just hoping for somthing around 140!?!!?

I assure you I am 100% anti rice my family has had 6camaros over the years. and im also very sure my amp has enough power to blow my P3 seeing as my amp makes 1040rms and the sub will take 500rms??? do the math. So im sure that wasent a statement to outlandish.

Is it possible for an less knoledgable person to ask for advice about somthing they want to learn about without being ridiculed or made fun of?

I was seeking advice for the best way to build my box. is there one way better than another? and designs that sound better than others? recommendations.... thats all

[ July 14, 2005, 12:43 PM: Message edited by: BOSSV6 ]

[LARRYfireBIRD33]

Something you might want to consider is having the sub firing down, into the well area as opposed to at the rear window. Many f-body audio enthusiasts have said this helps considerably as it lengthens the path of the sound wave.

[BOSSV6]

perhapps that could work. im not sure how to make a box that would house the sub upside down...

[96firebird311]

Originally posted by Big Tymer:
porting a box will not make it go 7 times louder, ( 3 db is "twice as loud" ).... your guesses are wayyyyyyyy offf...

Actually, you're "wayyyyyyyy offf". Human's perceive something to be twice as loud with a 10db increase. 3db is just a noticeable difference.

Is it possible for an less knoledgable person to ask for advice about somthing they want to learn about without being ridiculed or made fun of?

Very possible BOSSV6. Everyone is different though. The more you post, the more I tend to think you are looking for a hardcore knock out of this 15". May I suggest you go ported right from the start? Save some time? I'm on a community computer right now and don't have access to any of my box modeling software, but I'm sure someone here will be able to hook you up with some specific measurements.

[BOSSV6]

Yes, perhapps ported is the way to go right from the start. i just have a last of tools here and need to find a simple disign idea for making the box. i hope it turns out LOUD [img]graemlins/rock.gif[/img]

[Big Tymer]

Originally posted by 96firebird311:
</font><blockquote>quote:</font><hr />Originally posted by Big Tymer:
porting a box will not make it go 7 times louder, ( 3 db is "twice as loud" ).... your guesses are wayyyyyyyy offf...

Actually, you're "wayyyyyyyy offf". Human's perceive something to be twice as loud with a 10db increase. 3db is just a noticeable difference.

Is it possible for an less knoledgable person to ask for advice about somthing they want to learn about without being ridiculed or made fun of?

Very possible BOSSV6. Everyone is different though. The more you post, the more I tend to think you are looking for a hardcore knock out of this 15". May I suggest you go ported right from the start? Save some time? I'm on a community computer right now and don't have access to any of my box modeling software, but I'm sure someone here will be able to hook you up with some specific measurements. </font>[/QUOTE]did i say human noticablility, or actual? I think I just said 3 db is twice as loud, yep I did..... and no the human ear for some people can hear the difference between 3 db. everyone is different.... so know what you are talking about before you blurt out.. u may be a mod but that doesnt mean you are always right..... :) alhtough most of the time you are...

[95Batmobile]

Originally posted by LARRYfireBIRD33:
Something you might want to consider is having the sub firing down, into the well area as opposed to at the rear window. Many f-body audio enthusiasts have said this helps considerably as it lengthens the path of the sound wave.

I thought bass frequency was omnidirectional, didn't matter which direction the sub was facing you would hear it the same?

[LARRYfireBIRD33]

Originally posted by 95Batmobile:
[/qb]

I thought bass frequency was omnidirectional, didn't matter which direction the sub was facing you would hear it the same? [/QB][/QUOTE]

Not true. You can ask anyone who has had a milhouse box the difference from when the subs are facing down vs. when they are facing the rear window. Changing the phase of the sub will also affect it's sound. It changes the path length which can make it louder or quieter at different distances.

[96firebird311]

Originally posted by Big Tymer:
did i say human noticablility, or actual? I think I just said 3 db is twice as loud, yep I did..... and no the human ear for some people can hear the difference between 3 db. everyone is different.... so know what you are talking about before you blurt out.. u may be a mod but that doesnt mean you are always right..... :) alhtough most of the time you are...

"Twice as loud" could be relative to who or what is listening I guess...but last time I checked this system was for a human to listen to.... [img]tongue.gif[/img] And for the record, I'll be the first to say I'm not always right. Never said I was. We're all here to learn for one another. [img]smile.gif[/img]


95Bat & Larry, I think you're both right actually. When people say the frequencies that subwoofers produce are "omnidirectional" they mean you cannot tell which direction they are coming from. Not necessarily louder or more quite. Now then, from flat-out experience I can tell you that larry's statement is also correct.

[LARRYfireBIRD33]

I agree that people say subs are "omnidirectional" and you cannot tell where it is coming from. However, from personal experiences with both car and home audio, it takes a well EQ'd and integrated subwoofer for this to be the case. If it is tuned poorly, or in the wrong phase, it is easy to hear that the sub is behind you (in most car audio).