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Old 17th December 2012, 04:08 PM   #21
sreten is offline sreten  United Kingdom
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Hi,

Some links below. Zaphs site is the best for explicitly showing
the difference between electrical and acoustic x/o functions.

e.g. Zaph|Audio

Click the image to open in full size.

Is 4th order L/R acoustic at 2KHz, but due to the drivers and
the box the electrical x/o function is nothing like 4th order L/R.
Treble is 2nd order and mid bass third order elliptical (Cauer).
For the Cauer the 1st order part incorporates BSC and the
carefully dimensioned following 2nd order notch suppresses
the drivers peak whilst also emulating the L/R roll-off.

Click the image to open in full size.

Result ? something near 4th order L/R acoustic, assymetric due to the forward tweeter :
(The on purpose assymetry realigns the optimum listening axis not to be down tilted.)

Click the image to open in full size.

Zaph knows his stuff .

rgds, sreten.


http://sites.google.com/site/undefinition/diy (see if nothing else, the excellent FAQs)
http://techtalk.parts-express.com/sh...d.php?t=219617
Zaph|Audio
Zaph|Audio - ZA5 Speaker Designs with ZA14W08 woofer and Vifa DQ25SC16-04 tweeter
FRD Consortium tools guide
http://web.archive.org/web/200909021...esigningXO.htm
RJB Audio Projects
http://web.archive.org/web/200909022...ve99/Spkrbldg/
Speaker Design Works
http://www.htguide.com/forum/showthread.php4?t=28655
A Speaker project
http://www.troelsgravesen.dk/Diy_Lou...r_Projects.htm
Humble Homemade Hifi
Quarter Wavelength Loudspeaker Design
Pi Speakers - unmatched quality and state-of-the-art performance
The Frugal-Horns Site -- High Performance, Low Cost DIY Horn Designs
6.283 Audio Pages
Linkwitz Lab - Loudspeaker Design
Music and Design

Great free SPICE Emulator : http://focus.ti.com/docs/toolsw/fold...t/tina-ti.html
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Last edited by sreten; 17th December 2012 at 04:24 PM.
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Old 17th December 2012, 04:16 PM   #22
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Awesome! Much appreciated, sreten !!!!
I will minutely go through them and post my queries here, if any!
Thanks a ton!
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Last edited by csom; 17th December 2012 at 04:18 PM.
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Old 17th December 2012, 04:40 PM   #23
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this link http://www.troelsgravesen.dk/Diy_Lou...r_Projects.htm
is not working I guess. Could you kindly check it ?
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Old 17th December 2012, 04:43 PM   #24
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I have another quick question.
If I switch to open baffle design, could these practical problems be minimized ?
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Old 17th December 2012, 05:00 PM   #25
sreten is offline sreten  United Kingdom
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DIY Loudspeakers

Hi,

The above should work for TG's site.

Open baffle design causes even more misunderstandings and mistakes
IMO, and certainly doesn't minimise any problems of doing it right IMO.

Having said that, I like : https://sites.google.com/site/undefi...diy-sunflowers

rgds, sreten.
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Last edited by sreten; 17th December 2012 at 05:04 PM.
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Old 17th December 2012, 05:08 PM   #26
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Now the link is working!

Thank you sreten for your inputs regarding my misconstrued thinking related to open baffle design as I read somewhere earlier that they are considered as the ultimate solution in speaker design technology!
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Old 17th December 2012, 05:20 PM   #27
sreten is offline sreten  United Kingdom
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Hi,

Nothing wrong with good OB designs if that is what you want and
you understand the SPL limitations regarding bass driver size.

They are more difficult to design properly than box speakers IMO.
(Though they can be far easier to build.)

See the MJK, Linkwitz and M&D sites.

rgds, sreten.
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Last edited by sreten; 17th December 2012 at 05:25 PM.
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Old 17th December 2012, 05:23 PM   #28
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Another question.
Can I use a full range 3 way car speaker as mid range ( adjusting level ofcourse) along with a midbass and tweeter in a 3 way system?
Is this a pragmatic implementation?

For the time being I added two Car Speakers in the middle for experiment . (The black ones in the photo)
Attached Images
File Type: jpg floor stander.jpg (108.9 KB, 353 views)
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Last edited by csom; 17th December 2012 at 05:29 PM.
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Old 17th December 2012, 05:27 PM   #29
sreten is offline sreten  United Kingdom
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Hi,

The short answer is no, it will be awful, one good mid will be far better.

rgds, sreten.
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Old 17th December 2012, 05:33 PM   #30
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In my situation, which one would be better, could you please suggest ?

1. Using the full range for lowpass filter, omitting the current mid-bass

or

Using the mid-bass only ( ignoring the car speakers )
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