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info about VAS

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Category: Plans
Forum Name: Scoops
Forum Description: One scoop or two ;-)
Printed Date: 03 March 2024 at 12:33am
Software Version: Web Wiz Forums 12.06 -

Topic: info about VAS
Posted By: _Natty_
Subject: info about VAS
Date Posted: 29 November 2007 at 1:25pm
if I load a super scoop with a speaker 18" that have not a very high vas (around 198 l)  wich kind of problem can I meet?

Posted By: Jhodas
Date Posted: 29 November 2007 at 4:51pm
Well the void V18-1000 has a Vas of 201 (near as makes no difference) and that sounds amazing in super scoopers buy all accounts. However, that doesn't mean the one you have in mind will, as some of the other parameters may be different.

Do you have a specific driver in mind?  If so  info please!!

Until the Lions have their own historians, tales of hunting will always glorify the hunter.

Posted By: mobiele eenheid
Date Posted: 29 November 2007 at 4:51pm
Getting it to go deep in singles IIRC. But than again, in general predicting performance should be based on the relationships between parameters rather than a single parameter.
Wkr Johan

Posted By: _Natty_
Date Posted: 29 November 2007 at 5:42pm
thanks for the ans
I know also that an important value is the Fs,Qts ratio...mine is around 128 thats true?
also is the  bl param  important too?how big should be for a good performance?

the other ts param are:
fs: 36 Hz
Re: 3,71 ohm
zmaz: 80,71 ohm
qms: 6,25
qes 0,29
qts 0,28
vas 197,94 l
sd: 1132 cm2
mms 177,5 gr
le 1,55 mH
cms 109,98 nano m/newton
bl 22,78 tesla/m
splref 98 db
eta0 3,09%
xmax 10,00 mm
power hand 900 wrms
vcoil diam 100 mm
winding depth 25 mm
wending material copper

Posted By: Jhodas
Date Posted: 29 November 2007 at 6:39pm
I would have said the BL was a bit low personally. 1850 and V18-1000 both have BLs over 30, so the magnet would probably lose control of the cone a lot sooner, meaning the speaker would take less power before hitting Xmax. QTS is well above the other two as well. I reckon this would be more at home in a reflex box.

Before you go nuking your brand new cones tho, I'd wait for someone else to corroborate this.

Until the Lions have their own historians, tales of hunting will always glorify the hunter.

Posted By: bort_83
Date Posted: 29 November 2007 at 9:05pm
_natty_ which driver you are speaking ?

Posted By: _Natty_
Date Posted: 30 November 2007 at 10:47am
it's a neodimio b&c driver not include on the catalogue....

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