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Old 20th August 2008, 11:17   #31
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hey nishant why dont you get in touch with Ramie2400 also?

Last edited by KSM-Vtec : 20th August 2008 at 11:21.
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Old 20th August 2008, 11:27   #32
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Quote:
Originally Posted by low_bass_makker View Post
Which will be better sounding sub one in a ported box vs in a sealed box.
Sealed box advantages:
Easier to build
Tolerant of anamolies in T/S specs
Slow bass roll off that often is quite accurately compensated by cabin gain

Ported box advantages:
More efficient

A well tuned ported box can sound as good as a well tuned sealed box but the odds of a successful sealed box are higher.
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Old 20th August 2008, 14:22   #33
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Quote:
Originally Posted by navin View Post
Slow bass roll off that often is quite accurately compensated by cabin gain

.
did not understand
please teach class 1 basics
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Old 20th August 2008, 14:34   #34
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when using a car subwoofer , there are effectively boxes whose frequency response comes into play . The most obvious is the subwoofer enclosure, and thats what we've talking about so far. the second enclosure is the car's cabin itself , which imposes a frequency response of its own.
Typically, the response of a ported sub will be like
__...
|.. \..
|.... \.
while a sealed sub response will be like
.._..
./ .\.
/ .. \


but the point navin is saying is that the car's cabin has a response like

\
.\____

so together , when you multiply them, the effective response comes out flat

* graphs obviously oversimplified for clarity
dots inserted to make the slashes align correctly

Last edited by greenhorn : 20th August 2008 at 14:38.
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Old 20th August 2008, 16:01   #35
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Quote:
Originally Posted by greenhorn View Post
when using a car subwoofer , there are effectively boxes whose frequency response comes into play . The most obvious is the subwoofer enclosure, and thats what we've talking about so far. the second enclosure is the car's cabin itself , which imposes a frequency response of its own.

but the point navin is saying is that the car's cabin has a response like

\
.\____

so together , when you multiply them, the effective response comes out flat
more accurately the roll off of most sealed subwoofers (Qtc about 0.7) is almost a mirror image of the gain posed by most car cabins (esp mid sized sedans).

A ported box will have a response that is more extended but it rolls off at a faster rate (past the "knee") as well.
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Old 20th August 2008, 17:05   #36
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Quote:
Originally Posted by low_bass_makker View Post
Bro it means you are trying to say that the JBL sub cannot play stuff below the specified freq range mentioned on the site ?
No i am JUST trying to point out the difference between GT4-12 and CS1204 even though both are same, i never found any difference in them playing.
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Old 20th August 2008, 17:53   #37
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Quote:
Originally Posted by abhibh View Post
No i am JUST trying to point out the difference between GT4-12 and CS1204 even though both are same, i never found any difference in them playing.
Why deviating from your answer bro.

You mentioned Frequency and I am asking if that it can play below that or not simple.
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Old 20th August 2008, 18:13   #38
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Quote:
Originally Posted by low_bass_makker View Post
Why deviating from your answer bro.

You mentioned Frequency and I am asking if that it can play below that or not simple.
Deviating eh

Quote:
Originally Posted by abhibh View Post
Regarding sub you will never go wrong with GT4-12 or CS1204. Both are same except for mounting depth and CS1204 frequency is 23 hz to 450 hz where as GT4-12 frequency is 28 hz to 450 hz.
Clearly mentioned above. Never stated how much low it can play or not. Just going by the specs given in the manuals and was pointing out the differences i found (according to the specs on JBL website)

Last edited by abhibh : 20th August 2008 at 18:14.
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Old 20th August 2008, 18:24   #39
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Koi nahi, the freq response of the sub also depends on the enclosure in which it is installed. And the cabin gains plays a very important role bro. Like our GreenHorn commented.

Last edited by navin : 20th August 2008 at 20:54.
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Old 20th August 2008, 21:15   #40
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Quote:
Originally Posted by low_bass_makker View Post
Good Ignorance at its best...

Koi nahi, the freq response of the sub also depends on the enclosure in which it is installed. And the cabin gains plays a very important role bro. Like our GreenHorn commented.
If knowing the specs and posting them is ignorance then i must say ICE -Ignore Car Entertainment
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Old 20th August 2008, 21:46   #41
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abhibh, I wouldn't read too much into the specs shown on the site. The site itself seems to be unsure

From the same page

Quote:
True Four Ohm - GTO Series speakers can be safely driven by any head unit.
Quote:
Impedance 2 Ohms
and this is not just a one off, a lot of the GTO speakers seem to be unsure about their impedance

Last edited by greenhorn : 20th August 2008 at 21:49.
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