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Old 16th August 2007, 15:01   #31
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Originally Posted by zucchero View Post
is it possible to know that wether a woofer is an SQ or SPL going by the xmax is what i wanted to know??
NO

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Old 16th August 2007, 17:19   #32
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Originally Posted by Bass&Trouble View Post
Your posts have started to bear an uncanny resemblance to Navin's in the sense that they have me miserably confused due to my own shortcomings.

Navin, can you please run an IP check to confirm that you are not posting under this assumed handle.

I meant to say that even though a sub may have a linear Xmax of 50mm, it may travel peak to peak with as low as 10 watts and as much as 1000 watts. I hope that is what you were trying to explain.
Navin is Navin, I can't even dream of aspiring his achievements - that is what makes him think and express differently.

And you are being an epitome of humility when you talk of your supposed shortcomings.

And yes, you are right - my assumption was it is the di/dt that does the trick (like battery test), not the absolute i or power - the subject of driver Q and amplifier Damping Factor. No, let me not start another one of those!
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Old 16th August 2007, 17:21   #33
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No, let me not start another one of those!
Why not....let us start it...
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Old 17th August 2007, 10:54   #34
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Originally Posted by zucchero View Post
is there any TRUE SPL subwoofer with an xmax of 10-15mm.(12'ers).at the end of the day its the amount of mass OF AIR MOVED WHAT WE PERCIEVE AS sound.
It is not only the quantity of air moved but HOW it was moved that adds to our perception of sound. Listen to the following.

a TL made by Bud Fried (any one, all of Irv's designs were fantastic).
a Horn made by Paul Klipsch (anyone pre 1980 before this son took over)
a Sealed box made by Vilchur and Kloss (sold under the AR brand - from the 50s and 60s)
and so on...
each of these speakers epitomised a certain philiosophy the tuneful-ness of the TL, the Slam of the Horn and the tightness of the Acoustic suspension.

BTW 30 min with any of these guys > all the audio books ever written.

Each of these speakers could produce the a reference SPL (say 90db at 50Hz) but each of them sounded very different (at that reference SPL). That is what I refer to as Quality of Sound/Bass.

The same applies to woofers in general. Xmax along with Sd only tells you how much air was moved not how it was moved.

LBM, did you see the BL on that Pio woofer?

B&T/Der Alte, Xmax does NOT determine how much power a woofer can take but is does determie when the woofer wil reach it's physical limits. That limit might be before or after it's thermal power rating depending on the design of the woofer and it's loading.

In ported boxes the Xmax is often reached before thermal limits are reached, sealed boxes are less prone to this malady and horns dont refer to Xmax limitations as the bass system is so efficient.

I did an IP check and Der Alte and me are using very different IPs. His posts might have the same "feel" as he is from the same generation.
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Old 17th August 2007, 11:10   #35
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LBM, did you see the BL on that Pio woofer?
Hmm it is quite High than I normally see....
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Old 17th August 2007, 12:07   #36
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Hmm it is quite High than I normally see....
3 times as high as a "regular" 12" woofer!
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Old 17th August 2007, 12:12   #37
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3 times as high as a "regular" 12" woofer!
Ya agree...it means Pioneer SPL subs are not joke like there ordinary ones...

Achieving such high BL need some good magnets and some nice VC.
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Old 17th August 2007, 12:15   #38
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Originally Posted by zucchero View Post
is it possible to know that wether a woofer is an SQ or SPL going by the xmax is what i wanted to know??
Zucchero, did you mean to ask:
- ''Do all SQ subs have low xmax, and do all SPL subs have high xmax?''
- And, '' Can a sub with a high xmax (and so high SPL tendencies) be considered an SQ sub?''
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Old 17th August 2007, 12:55   #39
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i guess i had put up the question in a wrong wrong way.hydrashok
i only wanted to know that supposin i am looking for a SPL sub then shouldnt i consider the XMAX factor also,bcoz the greater the xmax greater the output(loudness).
it is not nessary for an SQ sub to have more xmax.

Last edited by zucchero : 17th August 2007 at 12:56.
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Old 17th August 2007, 13:01   #40
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Originally Posted by zucchero View Post
i guess i had put up the question in a wrong wrong way.hydrashok
i only wanted to know that supposin i am looking for a SPL sub then shouldnt i consider the XMAX factor also,bcoz the greater the xmax greater the output(loudness).
it is not nessary for an SQ sub to have more xmax.

The xmax is not a factor with which you can decide that a woofer is a SPL or SQ. One has to check for the whole package...

Who say that a SQ sub does not need more xmax check out the specs of IDMAX, JL Audio W7, RE XXX, Brahama...

Last edited by low_bass_makker : 17th August 2007 at 13:04.
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Old 17th August 2007, 14:55   #41
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lbm,idmax,adire,rexxx are sq sub which do SQL brilliantly!!
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Old 17th August 2007, 17:51   #42
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Originally Posted by zucchero View Post
lbm,idmax,adire,rexxx are sq sub which do SQL brilliantly!!
Sir Ji are you challenging your own question...

Is IDMAX, RE XXX a SQ sub or a SQL sub..

What you posted in the last post it means that it is a SQ sub which can do SQL or it is a SQL sub which can do SQ.


And I am again says like I said before...XMAX is not a criteria to judge that a woofer is a SQ, SQL, or SPL. There are lots of other factors involved...
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