You must be talking about an actively driven , Open baffle system here, The larger vas wont mean a thing in that system for sure.
"1 - you dont need softer suspension to realize advantages of larger xmax"
To maximize it, Why not?😎 😀
"1 - you dont need softer suspension to realize advantages of larger xmax"
To maximize it, Why not?😎 😀
marchel said:
no i am talking about a sealed box.
do you think an infinite vas would require and infinite sized box ?
pistons in a car's engine have infinite vas because there is no suspension at all and yet they operate in a volume much smaller than even most desktop speakers - does this bother you ?
You guys are cluttering up this thread with useless, non-entertaining squabbling.
If you're gonna argue, at least make it amusing...
If you're gonna argue, at least make it amusing...
"pistons in a car's engine have infinite vas because there is no suspension at all and yet they operate in a volume much smaller than even most desktop speakers - does this bother you ?"
marchel said:
Ever hear of a PCV valve?
Car engines are only musical to some, given the right muffler.
in one of his standup routines George Carlin narrowed down the ten commandments to like 2 ... lets see if i can do the same for TS parameters
you only need
SD
MMS
BL^2/Re
you only need the above 3 numbers ... everything else is redundant.
VAS is completely useless, it does not have any effect on response unless it is too low in which case you just dont use that driver
Qms is just as useless, it also has no effect unless it is too low
Fs can be computed from MMS, Vas and SD so its also useless
Qes can be computed from Fs and BL^2/Re so its useless
Qts can be computed from Qes and Qms so its useless
its all useless ....
the only things you need to know are moving mass, effective surface and motor force ... thats it
SD and MMS completely describe the mechanical nature of the driver (because Qms, Fs and Vas are relatively negligible)
BL^2/Re completely describes the electrical behavior of the driver (the rest is minor details)
Xmax is not even a TS parameter because TS paramters are small signal parameters and Xmax has nothing to do with small signals ... so you can guess how much effect it has on response ...
why, you ask, do then all those other parameters exist ? well for completeness and convenience. for convenience people came up with Efficiency Bandwidth Product ... its obviously 100% redundant yet convenient.
you only need
SD
MMS
BL^2/Re
you only need the above 3 numbers ... everything else is redundant.
VAS is completely useless, it does not have any effect on response unless it is too low in which case you just dont use that driver
Qms is just as useless, it also has no effect unless it is too low
Fs can be computed from MMS, Vas and SD so its also useless
Qes can be computed from Fs and BL^2/Re so its useless
Qts can be computed from Qes and Qms so its useless
its all useless ....
the only things you need to know are moving mass, effective surface and motor force ... thats it
SD and MMS completely describe the mechanical nature of the driver (because Qms, Fs and Vas are relatively negligible)
BL^2/Re completely describes the electrical behavior of the driver (the rest is minor details)
Xmax is not even a TS parameter because TS paramters are small signal parameters and Xmax has nothing to do with small signals ... so you can guess how much effect it has on response ...
why, you ask, do then all those other parameters exist ? well for completeness and convenience. for convenience people came up with Efficiency Bandwidth Product ... its obviously 100% redundant yet convenient.
This is not subwoofer
what is very important how sound in the midrange area ...
for pure woofer there is a dedicate section on scanspeak
what is very important how sound in the midrange area ...
for pure woofer there is a dedicate section on scanspeak
so let me get this straight.
the new scanspeak illuminator woofer is technologically advanced like an F1 car. it costs as much as an F1 car.
yet it's as unusable on public roads as an F1 car.
....
I guess what I'm trying to say is... the last page of this thread is worthless!
the new scanspeak illuminator woofer is technologically advanced like an F1 car. it costs as much as an F1 car.
yet it's as unusable on public roads as an F1 car.
....
I guess what I'm trying to say is... the last page of this thread is worthless!
y8s said:
im sure you could adapt F1 to be street legal ...
Caparo T1
but i would rather drive a Veyron ...
F1 has lots of ridiculous artificial limitations. everything is banned on F1. they banned all wheel drive, they banned turbos, and of course they dont allow engines bigger than 3 liters. why pay for artificial limitations ?
to me 6" diameter is an equally artificial limitation ... i see no point in paying for a 6" woofer when there are good 18" ones.
now a good 6" midrange would be nice ... but there already is one ... it also uses an underhung neodymium motor but unfortunately there is no choice of materials for the cone, instead the only material available is better than anything scan-speak will ever offer
6" Midrange
i would rather take the above midrange and the following woofer
18" woofer
build a 3-way and laugh hysterically at anybody who bought the illuminator ....
oh yeah, almost forgot, if you like small speakers ... buy bose ...
y8s said:
any tool is useless to a person who doesn't know how to use it ...
i like the tweeter though ... in fact i like it a lot ! it might very well go into the 3-way outlined above ...
Erm, but Bose are rubbish and I can't fit a 3-way with 18" bass driver in my current room (as much as I'd like one). Now what? Are you going to suggest Aiwa next?
vasyachkin said:
Looks like the sort of application a Scanspeak midwoofer could be successfully used in.
SimontY said:
of course. except all the effort would be wasted because you can just buy the thing already made.
there are two reasons to DIY
1 - beat the system ( build something that performs better than what you can afford to buy ready made )
2 - make something creative ( build something different from what you can buy ready made )
when you spend the exact same amount of money as a finished speaker costs and get the exact same performance plus its not any more unique or interesting ... thats called a waste of time 🙂
of course there is another reason
3 - learn
however one doesn't need to buy an illuminator to learn, so illuminator is just hopelessly useless
I think you've covered the main reasons why we DIY. My main motivators are numbers 1 and 3.
If this new driver has a good price it stands a good chance of being worth using.
If this new driver has a good price it stands a good chance of being worth using.
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