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LX-mini Crossover Article
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Old 8th November 2019, 05:59 PM   #621
Nelson Pass is offline Nelson Pass  United States
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LX-mini Crossover Article
I think what you will like about this one is the +/- 1 octave adjustment range
of each of the 1 - 4 poles per filter. Gives some adjustment wiggle room you don't
normally get.
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Old 9th November 2019, 11:09 PM   #622
JuleZ3C is offline JuleZ3C
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Yeaaahhh, bring it on baby! hmm Sir!


Getting tired of my low humming, 'did-it-myself' POS proto board(s)
Click the image to open in full size.


Adjustment range sounds very cool indeed!
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Old 10th November 2019, 12:55 AM   #623
Nelson Pass is offline Nelson Pass  United States
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LX-mini Crossover Article
BTW, I am bringing a few LXmini crossover kits - board, semis, resistors, caps
to distribute at BAf tomorrow.
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Old 10th November 2019, 07:44 AM   #624
cubicincher is offline cubicincher  Germany
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Default to Nelson Pass #621

Hello Mr. Pass,


this will become a very nice active crossover!


One octave adjustment per pole sounds very good.



Thanks for your efforts on this project. I think you are extremely busy before BAF....


Greets
Dirk
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Old 11th November 2019, 02:53 PM   #625
signalbeach is offline signalbeach
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Quote:
Originally Posted by Nelson Pass View Post
I think what you will like about this one is the +/- 1 octave adjustment range
of each of the 1 - 4 poles per filter. Gives some adjustment wiggle room you don't
normally get.
Hi Nelson,
Will it be possible to use the new crossover in a balanced configuration with 2 poles per filter ? If so, do you recommend any component matching between the + and - phases if operating balanced ?

BTW, I'm using a Pass Int 250 integrated amplifier. Is there any easy way to bypass the preamp section of my Int 250 ? I probably need to implement a master volume control and input switching separately.

I'm excited to see the crossover. Thanks for all your efforts for the DIY community !
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Old 11th November 2019, 03:40 PM   #626
chromenuts is online now chromenuts  United States
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Ignore me...did some back reading. Thanks for this Pa.

Last edited by chromenuts; 11th November 2019 at 03:49 PM.
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Old 11th November 2019, 06:29 PM   #627
Nelson Pass is offline Nelson Pass  United States
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LX-mini Crossover Article
Quote:
Originally Posted by signalbeach View Post
Hi Nelson,
Will it be possible to use the new crossover in a balanced configuration with 2 poles per filter ? If so, do you recommend any component matching between the + and - phases if operating balanced ?

BTW, I'm using a Pass Int 250 integrated amplifier. Is there any easy way to bypass the preamp section of my Int 250 ? I probably need to implement a master volume control and input switching separately.
You can tap into the points on the existing board, and may have to cut
some traces, but it can be done. Easier just to get two of them and use
one board for each balanced channel.

I don't know about the bypass of the INT250 preamp. We will have to
ask Wayne.
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Old 3rd December 2019, 01:01 PM   #628
DUC985 is offline DUC985  Germany
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Can somebody enlighten me how the EQ works and how to calculate the values. I did try to modify the values to reflects a 250Hz Crossover with a 40HZ bump for an open baffle.
My initial thoughts are to leave the EQ out ...
Attached Images
File Type: jpg 250HZ.JPG (142.1 KB, 225 views)
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Old 3rd December 2019, 09:49 PM   #629
Nelson Pass is offline Nelson Pass  United States
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LX-mini Crossover Article
It's not a "standard" circuit, but is easily simulated. The schematic you see can
be entered into MicroCap (free from spectrum software) and you can play with it
until the cows come home....
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Old 4th December 2019, 08:14 AM   #630
DUC985 is offline DUC985  Germany
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thx Nelsom, i understand what it does, sounds like a specific requirement for the LXMini so speaker specific ..
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