Enclosure Volume - Page 2

sreten · 13th May 2004, 03:15 PM

Sealed box loading is indicated, though the driver would
work best driven by lowish power and used open baffle.

The driver is not a good subwoofer driver.

Fs is far too high, an octave lower (27Hz) or lower is better.

Qts is also too high, for reflex ~ 0.35 with low Fs is good.

Its a passable bass unit for a big cheap speaker at best.

Low Fs, moderate Q, moderate Vas, reasonable efficiency
and high excursion with low distortion are good.

sreten.

sonu · 14th May 2004, 08:50 AM

OK.......
but I wanna know as how to select a best driver i.e. what parametrs i should look for when selecting.

As i have made this driver on my own, I want to know what all affects the change in VAS, Fs, Q etc for a driver.

Cause now i am making an 15" Driver, so i will select cone, coil, frame and magnet which should give a good thiele parameter as needed.

lucpes · 14th May 2004, 10:38 AM

Edit: Ok, sorry, I know that you did all this but it should help others:

http://www.mhsoft.nl/messen_en.asp - measuring T/S parameters on your own.

You can use a computer with a soundcard for an audio generator:

http://www.nch.com.au/tonegen/index.html

Then, to calculate box/tuning/ported or not, download this:

http://www.linearteam.dk/default.aspx?pageid=winisdpro

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13th May 2004, 03:15 PM	#11
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	Sealed box loading is indicated, though the driver would work best driven by lowish power and used open baffle. The driver is not a good subwoofer driver. Fs is far too high, an octave lower (27Hz) or lower is better. Qts is also too high, for reflex ~ 0.35 with low Fs is good. Its a passable bass unit for a big cheap speaker at best. Low Fs, moderate Q, moderate Vas, reasonable efficiency and high excursion with low distortion are good. sreten.

14th May 2004, 08:50 AM	#12
sonu diyAudio Member Join Date: Apr 2004 Location: maharashtra	OK....... but I wanna know as how to select a best driver i.e. what parametrs i should look for when selecting. As i have made this driver on my own, I want to know what all affects the change in VAS, Fs, Q etc for a driver. Cause now i am making an 15" Driver, so i will select cone, coil, frame and magnet which should give a good thiele parameter as needed.

14th May 2004, 10:38 AM	#13
lucpes diyAudio Member Join Date: Dec 2003 Location: Iasi	Edit: Ok, sorry, I know that you did all this but it should help others: http://www.mhsoft.nl/messen_en.asp - measuring T/S parameters on your own. You can use a computer with a soundcard for an audio generator: http://www.nch.com.au/tonegen/index.html Then, to calculate box/tuning/ported or not, download this: http://www.linearteam.dk/default.aspx?pageid=winisdpro

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