18 Inch Subs

[kryptonitewhite]

Subs don't play louder as they get bigger, They can play lower. Clear difference in the 2

Because if it was the case then they would just make subs bigger to get louder

I think it's a combination of excursion, cone area, and the ability to utilize both. 1 18" will play mid/high bass louder than a smaller sub, assuming moving both to more excursion or the same excursion. If you have a badass 10" that moves much further than a weak 18, that 10 could get louder in all frequencies including hight and low, cuz it moves further. but same for same, the same kind of 18 will be over all loder than it's 10" counter part. (alignment taken into cinsideration)

[kryptonitewhite]

No fight needed. Just wanted to clear up some mis conceptions. It's no different they someone saying that a cap will fix your low voltage problems

if it doesnt, get a more expensive cap

[Team Bassick - Kimo]

MY .02

Listen to a real system.

http://www.stevemeadedesigns.com/board/ind...showtopic=20875

[KWP369]

hey bro i was wondering what other subs did you run that make the btl's have goos sound quality to your ears?

if you really want a sub wit good sound quality but still beat the shit out of your ears... i would recommend some 18 in. DC lvl 4's.... or maybe even the DC lvl 4xl (i don't know anything bout the DC lvl 4xl seein how they just got released to our information yesterday and they're not even ready for sell)... just my .02 cents

[aznboi3644]

Here is my opinion. The bigger the sub the lower the qaulity of sound. You have to sacrifice a little of this to get more of that. I think it will keep up but it wont sound as good as 12's and 15's but it will be louder. 18's are slower than subs that are smaller than them but that dont mean that the 18's is slow. When you are dealing with 18's the only thing you should be worrying about is your eardrums.

haha this just made me laugh.

Also saying an 18 inch sub "can't keep a note like a 10 or a 12" is retarded haha.

wow...uber noob

[doughboi916]

:rolleyes: ?????

[audiofanaticz]

both of these statements made me el oh el

12's are populare more for their physical size than anything. trunk cars have very limited air space, very limited dimensions. wanna try squeezing a couple 18's in there? not only would the box not fit (unless you built it IN the trunk, which most dont do, especially casual listeners) but subs would have a hard time fitting certain ways. 12's are more dynamic, and require lots less airspace making them more suitable. not because they sound 'different'. imo that's partly the reason of the 12" popularity.

So true... I got a 18 inch sub. It gets low and loud.

My box was built into my trunk (and is not comming out without trashing the box beyond use).

Because of the size of the sub (18 inches) the only way to install the sub in my trunk was bolt the sub to the double baffle and insert it all as one piece while building the box.

My sub does not have enough room to be fired forward or backwords, sub up port back is the only way it is fitting in my trunk, and with a 6 cubic foot box in my trunk I now have no trunk.

[LSN2meBoom916]

amen

if mass affected speed, then heavy 10" cones would have as much trouble as light 18's

playing a 60Hz tone on a heavier/bigger sub would be more like 50Hz

a muscle car with a 440 couldn't go as fast as a 4 cylinder honda

so long as you have power, cone size should only affect cone breakup and nodes, inductance being the largest factor

i think i made all of that up

I was wondering this myself.

Inertia?

Sorry but The Honda/muscle car analogy is waaaay off.

It says nothing of power to mass RATIO.

A solid lead or gold or plutonium car w/ a 440 prolly aint movin to quick...but a 3cyl Metro will do 60mph+ (so the CHP say ).

The power just has to be able to overcome the weight/mass involved.

But You were close.

Absolutely wrong some1 break it down for him.

HAHA.

This needs to be in someone's sig.

As quoted from "the guy in the crowd" that "knows it's all wrong.....but doesn't know or can't explain why".

Zero points alotted.

im gonna go ahead and jump on the "you are wrong" bandwagon....

RE XXX 18....top 3 quickest most responsive subs i have ever heard.

while common sense would dictate your statement has validity motor strength should compensate for cone mass on any decently designed sub.

Bandwagons are for...Bands....and Wagoneers...And maybe sheepish folks that wanna fit in.

I have heard the same claims about the XXX 12's and 18's....Just never heard em MYSELF tho...I DO...TRUST one of the people I heard it from as a "well versed sub enthusiast"...But listening is all subjuctive anyhoo...and we're still talking bout "theory" here. Not like we're sittin in the SAME car bumpin some jams to "settle this once and for all"

I never said they couldnt. 18's can damage your eardrum differently than 10's 12's and 15's because they are bigger and louder. Use your head. Are 12's louder than 18's? NO!

Do you read ur own response b4 you post?...or just type ur gut reaction and headbutt the enter key?

It's like saying a 4cyl car doing 110mph into a brick wall is less deadly than a 8cyl doing the same...110mph...is a constant...just like 150db on a TL...is (pretty) constant. Same pressure= same damage.

Are you really going to say that 18's are, "by design" louder then other subs?

How does more cone area damage your ears more then less cone area?

More cone area with equal EXCURSION would in theory make more SPL...But we all know there's even more to it than THAT...(i.e. system/vehicle design)

I never said 18's are slow. All I'm really saying is that 18's dont hold a note better than a smaller woofer. Why do you think that 12's are the most popular. 18's do not sound better than 12's, they are just louder. Im talkin about sound qaulity not spl. Most audio retailers that you go to have a few 10's a few 15's but have a sh.. load of 12's. 12'' woofers are the best woofers on the market period and thats the bottom line case closed.

Popularity is not an issue here....damn they beat me to it.

IIIIIIII

VVVVV

both of these statements made me el oh el

12's are populare more for their physical size than anything. trunk cars have very limited air space, very limited dimensions. wanna try squeezing a couple 18's in there? not only would the box not fit (unless you built it IN the trunk, which most dont do, especially casual listeners) but subs would have a hard time fitting certain ways. 12's are more dynamic, and require lots less airspace making them more suitable. not because they sound 'different'. imo that's partly the reason of the 12" popularity.

'12" woofers are the best woofers on the market period and thats the bottom line case closed.' please...tell me where you got this info to back it up, other than that 'you see a lot of people with 12's'.

Werd. You tell em.

[LSN2meBoom916]

No fight needed. Just wanted to clear up some mis conceptions. It's no different they someone saying that a cap will fix your low voltage problems

+1 on the no fighting policy.

SMD=TEH BEST FORUM ERVER.

Ummmmmmm...I dunno bout all that cap comparison.....STOP USING WIERD/BORDERLINE backwards analogies/comparisons.

It's like you're TRYING TO KILL MY CAT WITH A RUBBER SHOVEL!

Well they are to most people. Most of all it depends on the application.

SHAZZAM!

Winner winner chicken-hot pocket-dinner!

EXACTLY! yay

X2

We're agreeable him n me haha.

Same name..go fig.

A 10" badass sub is loder than a 34" pussy sub

Can't really argue with that.

Except the missing U.

(YES I'm just doing this to bust ur balls)

well i have my 18's set up for bass race right now = daily use! i beat the hell out of em i fell in love with the btl!!!

set em up right and they will play anything you want! rap rock even country lol

You listen to country!?

I think it's a combination of excursion, cone area, and the ability to utilize both.

1 18" will play mid/high bass louder than a smaller sub, assuming moving both to more excursion or the same excursion. If you have a badass 10" that moves much further than a weak 18, that 10 could get louder in all frequencies including hight and low, cuz it moves further. but same for same, the same kind of 18 will be over all loder than it's 10" counter part. (alignment taken into cinsideration)

I was with you until after the red stuff....it's still missing the "depending on build/design" stuff...cuz tuning/cabin gain etc...too much to say definitively one way or the other unless you cover ALL the variables.

Kurt Loder? Is he even still alive? Again with the missing U's.

Transient Response

Probably the least important of the characteristics that define the response of a subwoofer. The average person is unable to discern differences in transient response in the bass region, up to about 18ms, and that's assuming a perfect listening environment. In a normal environment, the other characteristics measured above will take precedence.

From: http://www.diysubwoofers.org/projects/othe...oom/measure.htm

And because I'm Losing interest already...just one more:

"Transient Response

Transient response refers to the ability of the subwoofer system to reproduce quick changes (transients) in the program material accurately. This is often interpreted as "tightness" or "looseness" which is maybe a dangerous terminology since many people are more influenced by tonal characteristics when asked to qualify the "tightness" of the bass. Transient response is actually a function of accuracy in relation to time rather than frequency. In music, sounds like drum strikes and quick bass guitar pulses are good tests of a subwoofer system's transient performance. A system with good transient response will reproduce these sounds with clear, "tight" definition. A system with poor transient response tends to blur these sounds over time, due to the speaker's inability to stop and start quickly enough to react to the signal accurately.

It is generally accepted that an optimized sealed enclosure exhibits the best transient response characteristics. The control provided by the air-spring in a good sealed system contribute to generally outstanding transient behavior (at very high power levels, the increased distortion can overshadow this advantage, however.)

A ported enclosure can also achieve good transient behavior but never as good as an optimized sealed enclosure. It is possible, however, for a well-designed ported enclosure to have better transient response characteristics than sealed enclosures with higher Qtc's (above 1.0.) The specific alignment of the sealed and ported enclosures plays a huge role in determining the transient characteristics of each individual subwoofer system."

Stolen from:

http://mobile.jlaudio.com/support_pages.php?page_id=147

& Some people say cucoumbers taste better pickled.

[A&W ROOTBEER]

if you really want a sub wit good sound quality but still beat the shit out of your ears... i would recommend some 18 in. DC lvl 4's.... or maybe even the DC lvl 4xl (i don't know anything bout the DC lvl 4xl seein how they just got released to our information yesterday and they're not even ready for sell)... just my .02 cents

im not trying to be a ass but if they arnt even released yet how do you know the DC lvl 4xl sounds good?