what parameters determines the performance of a subwoofer? XMax is how much
the cone can move in and out?(bigger better) ; Fs - the lowest frequency
(lower better?) ; SPL - higher better?

This may or may not be of help:

http://www.mobileaudio.com/rac-faq/rac-faq_4.html

"Johan Wagener" wrote in message
...
what parameters determines the performance of a subwoofer? XMax is how
much
the cone can move in and out?(bigger better) ; Fs - the lowest frequency
(lower better?) ; SPL - higher better?

Xmax and power handling can be extracted from the overall groupof
parameters and interpreted that way, but as soon as you get into the
other Thiele/Small parameters (Fs, Vas, Qts, etc.) you should really not
try and extrapolate driver performance by looking at them individually
or other than as a whole. People that have worked with driver parameters
their whole lives may be able to shortcut some of the number crunching
and judge performance differences by looking at only a few
characteristics, but if you lack that experience do yourself a favor and
plug ALL the numbers into one of the many free web-posted driver
modeling programs, like WinISD etc. and let the software do the work.

JD

Johan Wagener wrote:

what parameters determines the performance of a subwoofer? XMax is how much
the cone can move in and out?(bigger better) ; Fs - the lowest frequency
(lower better?) ; SPL - higher better?

"Johan Wagener" wrote in message
...
what parameters determines the performance of a subwoofer? XMax is how
much
the cone can move in and out?(bigger better)

Not necessarily.

; Fs - the lowest frequency
(lower better?) ;

Not necessarily.

SPL - higher better?

Definately NOT.
Better sounds subs will always have a low SPL.

Not true. My IDMAX sounds awesome and gets stupid loud. So does the Adire
Brahma and the eD A-series.


Paul Vina




Definately NOT.
Better sounds subs will always have a low SPL.

Sorry, but that is 100% not true... there are very good sounding
speakers in the world that have relatively high "SPL", i.e. sensitivity.

Granted, driver designers sometimes sacrifice sensitivity to achieve
lower Fs, or for other reasons, but it's never the only solution.

JD

Avanti wrote:

"Johan Wagener" wrote in message
...


what parameters determines the performance of a subwoofer? XMax is how


much


the cone can move in and out?(bigger better)



Not necessarily.

; Fs - the lowest frequency


(lower better?) ;



Not necessarily.

SPL - higher better?

Definately NOT.
Better sounds subs will always have a low SPL.

I think he was referring specifically to sensitivity, as rated in dB SPL
but either way it's not a true statement.

JD

Paul Vina wrote:

Not true. My IDMAX sounds awesome and gets stupid loud. So does the Adire
Brahma and the eD A-series.


Paul Vina






Definately NOT.
Better sounds subs will always have a low SPL.

the dBW can sometimes be used, I know it is in home audio, but enclosure and cars have the biggest affect on sound next to parameters
"John Durbin" wrote in message ...
I think he was referring specifically to sensitivity, as rated in dB SPL but either way it's not a true statement.

JD

Paul Vina wrote:

Not true. My IDMAX sounds awesome and gets stupid loud. So does the Adire
Brahma and the eD A-series.


Paul Vina




Definately NOT.
Better sounds subs will always have a low SPL.

"Paul Vina" wrote in message
news:cwFPb.99044$sv6.411357@attbi_s52...
Not true. My IDMAX sounds awesome and gets stupid loud. So does the
Adire
Brahma and the eD A-series.

Any speaker gets loud, if you want high fidelity sound then a speaker with a
lower dB/W will usually be the better sounding one, all other factors being
equal, also you will find the lower SPL speaker will work better than the
higher one in a smaller box,
obviously you do not beleive me and I don't give a hoot, but you may believe
JL, they have or certainley used to have a good explanation as to why on
their website.
Question how come the better quality subs have lower spl/w than the el
cheapo versions, ie JL, Infinity ZR- Apline, DLS, Kicker vs Pine lower cost
Kenwood Pioneer, Jet Sound etc....

"Avanti" wrote in message
...

"Paul Vina" wrote in message
news:cwFPb.99044$sv6.411357@attbi_s52...
Not true. My IDMAX sounds awesome and gets stupid loud. So does the
Adire
Brahma and the eD A-series.

Any speaker gets loud, if you want high fidelity sound then a speaker with
a
lower dB/W will usually be the better sounding one, all other factors
being
equal, also you will find the lower SPL speaker will work better than the
higher one in a smaller box,

Further to the above, the SPL is usually measured at 1khz, far above the
frequency you want pumping through your subwoofer.