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Multi-Way Conventional loudspeakers with crossovers

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Old 29th August 2005, 04:13 PM   #1
Sony is offline Sony  Europe
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Question 2nd order 3-way series xo (very rare)

Does any one know where I can find info on this very rare crossover (Schematics, calculators, etc.): 2nd order, 3-way and series topology.

Thks & Rgrds
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Old 29th August 2005, 10:26 PM   #2
Andy G is offline Andy G  Australia
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One does have to ask.. why ???
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Old 30th August 2005, 12:59 AM   #3
adason is offline adason  United States
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go to pass labs web
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articles
nelson has an detailed article on paralel and series crossovers
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Old 30th August 2005, 03:15 AM   #4
rabbitz is offline rabbitz  Australia
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AFAIK the 2nd order series doesn't have the sonic attributes of the 1st order series.

Would be a nightmare IMO but could be fun..... maybe.

Have a look at some info here.

http://home.zonnet.nl/geenius/Crossover.html
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Old 30th August 2005, 03:46 AM   #5
Andy G is offline Andy G  Australia
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IMHO, the aim of a series x-o is to COMBINE the drivers with the minimal amount of components. (sorta like a string bikini top)

With a parallel x-o you are trying to CONTROL and/or SEPARATE the drivers. (sports bra??)

Mind you, the full range guys prefer no x-o, I can see their point !!!

The main reason for using a second order series in a 2-way would be added protection for the tweeter, or to get away from the res point of something like the XT25. In a 3-way series, this should not be necessary, so a 2nd order 3-way series seems somewhat counter-productive
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Old 30th August 2005, 04:53 AM   #6
soongsc is offline soongsc  Taiwan
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Doesn't series XO have lower effeciency?
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Old 30th August 2005, 09:39 AM   #7
Sony is offline Sony  Europe
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Well, the idea was not a pure 3-way series, but a 3-way series for the tweeter and midrange in paralell with a typical 2nd order branch for the woofer.
A 2-way series circuit won't work, of course, because it wouldn't provide the bandpass function for the mid-drive.

With this series+paralell setup, the woofer has its own connection and no loss of power. Tweeter and midrange have all the advantages of a series crossover.

I believe the 12dB/oct is necessary because it's important to have a low-frequency crossing between the woofer and midrange and the mid couldn't handle well the low frequencies provided by a 6dB/oct curve (1st order).

I have actually seen and listened to such a crossover and was surprised by the correct integration and overall sonic result (this goes beyond theory/fiction). Therefore, I would like to make one myself, but couldn't find any references. This will be one of my last attempts before giving up on the passive territory and going active.
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Old 30th August 2005, 10:56 AM   #8
Andy G is offline Andy G  Australia
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If you have some spare time, why not play with one of these??

http://users.tpg.com.au/users/gradds...ss-overs8b.htm
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