15"s
03-29-2008, 06:41 PM
#21
Senior Member
SL Member
Thread Starter
Join Date: Apr 2007
Posts: 845
Originally Posted by shizzzon
people will argue 2 12s are not louder than 1 15 if you go the route of comparing apples to oranges when you should be comparing like installs.
It's simple-
2 12s have more cone area
2 12s have twice the heat dissipation.
2 12s can be positioned in a lot more positions than 1 speaker can directing sound better.
2 12s have more displacement.
And sometimes, 2 12s can actually be optimized to run in an enclosure smaller than 1 15, not all the time though.
So... typically, the only way 1 15 would be louder is install error or totally different product.
It's simple-
2 12s have more cone area
2 12s have twice the heat dissipation.
2 12s can be positioned in a lot more positions than 1 speaker can directing sound better.
2 12s have more displacement.
And sometimes, 2 12s can actually be optimized to run in an enclosure smaller than 1 15, not all the time though.
So... typically, the only way 1 15 would be louder is install error or totally different product.
03-29-2008, 06:56 PM
#23
Senior Member
SL Member
Join Date: Aug 2006
Location: Louisville, KY
Posts: 205
exactly, that's why i said install error or totally different product.
That is totally different product.
On a more simple comparison of apples to apples-
It would be assumed that
using 1 amp outputting 2kw of power-
2 12s 1kw each is louder than 1 15 2kw.
There are a LOT more specs than just power when referencing speaker comparison.
You have efficiency(which companies RARELY tell you what frequency peaked the efficiency test and as to which of the 2 methods used to test efficiency were used)
You have SD, which is the usable cone area for that sub. Not all subs of the same size have the same SD.
You have Xmax and Xmech- the farthest linear and mechanical excursion a sub can go. The more throw, the better for SPL.
You have displacement- if it can displace more air... well you understand.
Then you have install itself.
So, when comparing subs, when comparing apples to apples, the subs being compared must have like value.
for example, trying to figure out which would be louder for music for LSQ-
Fi BL vs AQ HDC3
SSA ICON vs Fi Q
Fi BTL vs RE XXX
DD Z vs SS XXX
Atomic APXX vs DD 9900
Close like comparisons.
Almost every sub company manufacturer multiple lines of subs.
Entry level, sound quality, mid-line, extreme, competition.
Those are typical levels.
Can't compare one level to another, it isn't like comparisons.
You might see MTX in a fleamarket... but that doesn't mean they are complete junk. The 9500 series is the only series worth owning in my opinion and i still believe they stole that line from DD but that's my opinion.
That is totally different product.
On a more simple comparison of apples to apples-
It would be assumed that
using 1 amp outputting 2kw of power-
2 12s 1kw each is louder than 1 15 2kw.
There are a LOT more specs than just power when referencing speaker comparison.
You have efficiency(which companies RARELY tell you what frequency peaked the efficiency test and as to which of the 2 methods used to test efficiency were used)
You have SD, which is the usable cone area for that sub. Not all subs of the same size have the same SD.
You have Xmax and Xmech- the farthest linear and mechanical excursion a sub can go. The more throw, the better for SPL.
You have displacement- if it can displace more air... well you understand.
Then you have install itself.
So, when comparing subs, when comparing apples to apples, the subs being compared must have like value.
for example, trying to figure out which would be louder for music for LSQ-
Fi BL vs AQ HDC3
SSA ICON vs Fi Q
Fi BTL vs RE XXX
DD Z vs SS XXX
Atomic APXX vs DD 9900
Close like comparisons.
Almost every sub company manufacturer multiple lines of subs.
Entry level, sound quality, mid-line, extreme, competition.
Those are typical levels.
Can't compare one level to another, it isn't like comparisons.
You might see MTX in a fleamarket... but that doesn't mean they are complete junk. The 9500 series is the only series worth owning in my opinion and i still believe they stole that line from DD but that's my opinion.
03-29-2008, 07:15 PM
#25
Senior Member
SL Member
Join Date: Aug 2006
Location: Louisville, KY
Posts: 205
if i were trying to impress someone, i would of just registered and start making topics of no concern.
all message boards i register to are for the purpose of educating myself and others.
If i cant do that, then whats the point of having a forum in the first place?
The beginning of this topic said something about going from 2 12s to 1 15.
Before doing that, one should re-evaluate why the current install is lacking taste because it would be worse if changing a current setup to a new one just to find out it's even worse then before.
I am just so used to helping people in the other forums, it carries over here.
I am also a computer repair tech and just like in car audio, i hate to see people waste money if I believe there is a potential for that to happen.
all message boards i register to are for the purpose of educating myself and others.
If i cant do that, then whats the point of having a forum in the first place?
The beginning of this topic said something about going from 2 12s to 1 15.
Before doing that, one should re-evaluate why the current install is lacking taste because it would be worse if changing a current setup to a new one just to find out it's even worse then before.
I am just so used to helping people in the other forums, it carries over here.
I am also a computer repair tech and just like in car audio, i hate to see people waste money if I believe there is a potential for that to happen.
03-29-2008, 08:02 PM
#27
Senior Member
SL Member
Join Date: Sep 2007
Location: NoVA
Posts: 187
http://s171.photobucket.com/albums/u...ent=15Mag1.jpg
15" Mag sealed in 3.0cuft
http://forum.ecoustics.com/bbs/messages/4/462571.html
Look at that thread and thats a design for a box roughly 3.5 cuft tuned to 30hz. Phil Salisbury/Woodlawn Cabnitry is the only box builder I know that has designed boxes for Scion tC's and knows the trunk space good enough, mainly because me and him met and designed that box above. His first design like that came out to about 6.86cuft net. that is using all the space in the trunk except for 1 3/8ths inches on each side. And that does not cut into the spare tire well either. If you want a box built like that in the thread I posted, then I would contact Phil about it. If you email him, tell him "Yanks" told you to email you and that you need a box designed like his design for his tc. He will know exactly what you are talking about.
To sum it up, yes, it is possible to do 1 15" ported and it is possible to do 2 15"s ported in the trunk.
15" Mag sealed in 3.0cuft
http://forum.ecoustics.com/bbs/messages/4/462571.html
Look at that thread and thats a design for a box roughly 3.5 cuft tuned to 30hz. Phil Salisbury/Woodlawn Cabnitry is the only box builder I know that has designed boxes for Scion tC's and knows the trunk space good enough, mainly because me and him met and designed that box above. His first design like that came out to about 6.86cuft net. that is using all the space in the trunk except for 1 3/8ths inches on each side. And that does not cut into the spare tire well either. If you want a box built like that in the thread I posted, then I would contact Phil about it. If you email him, tell him "Yanks" told you to email you and that you need a box designed like his design for his tc. He will know exactly what you are talking about.
To sum it up, yes, it is possible to do 1 15" ported and it is possible to do 2 15"s ported in the trunk.
