Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Pass Labs This forum is dedicated to Pass Labs discussion.

LX-mini Crossover Article
LX-mini Crossover Article
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 8th November 2018, 01:15 PM   #251
Kreisky is offline Kreisky  Italy
diyAudio Member
 
Join Date: Feb 2007
Location: paris
Hi, thanks to Nelson Pass for this active XO !
I was looking for an analogue active XO for years cause I'm not able to design it. I've only made some loudspeakers with passive crossover.
I would like to play with the Micro Cap sim file when it will be available to download... for now it's giving an error.

As many other here, I would be interested in 3-way single ended version !
__________________
Marco
Cairn FOG2 - My_ref C - DIY speakers
  Reply With Quote
Old 8th November 2018, 02:01 PM   #252
giova1960 is offline giova1960
diyAudio Member
 
Join Date: Nov 2015
Location: Denmark
I tried to save the CIR file but it doesn't work. Some help? error "404 Not Found", thanks




Quote:
Originally Posted by Nelson Pass View Post
There are plans for a more general crossover.

The LXmini crossover can be stuffed for a variety of loudspeakers.

You have the board and existing schematic, and I have posted a
MicroCap sim file:

404 Not Found for you to play with.

You can download the Windows demo version of MicroCap from:

Spectrum Software - Micro-Cap 12. Analog simulation, mixed mode simulation, and digital simulation software. SPICE and PSpice(R) compatible circuit simulator.

and alter the values to see the resulting curves.

After installing MicroCap demo, you click on the file and it launches you
into the screen showing the schematic. On the top bar, click on
Analysis, then AC, then Run, and see the result. You can edit the values
right on the screen, and after a little practice you can be doing this on
your own.

Note that the active elements in this sim are VCVS, voltage controlled
voltage sources whose value (gain) is set up as a buffer.

  Reply With Quote
Old 8th November 2018, 05:23 PM   #253
Nelson Pass is offline Nelson Pass  United States
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
LX-mini Crossover Article
It's on my list.....
  Reply With Quote
Old 8th November 2018, 08:40 PM   #254
giova1960 is offline giova1960
diyAudio Member
 
Join Date: Nov 2015
Location: Denmark
Thanks Nelson!
  Reply With Quote
Old 10th November 2018, 11:47 AM   #255
Joca is offline Joca  Portugal
diyAudio Member
 
Join Date: Oct 2014
Location: Aveiro
if you are asking for the file Nelson posted before, here it is:

LX_MINI_V1R0.CIR - Google Drive
  Reply With Quote
Old 10th November 2018, 11:48 AM   #256
giova1960 is offline giova1960
diyAudio Member
 
Join Date: Nov 2015
Location: Denmark
Thanks Joca!
  Reply With Quote
Old 10th November 2018, 04:55 PM   #257
Manolo47 is online now Manolo47  Puerto Rico
diyAudio Member
 
Join Date: Mar 2006
Location: San Juan, Madrid
Default 1st. order filters... question

So, for the sake of knowing, though I already calculated new resistor values for my 2nd. order HP/LP 100 hz crossover, what does one do in the sim schematic with the 2nd. R or C's in the model to simulate a 6db filter... thanks
  Reply With Quote
Old 10th November 2018, 06:44 PM   #258
Davey is online now Davey  United States
diyAudio Member
 
Join Date: Dec 2001
Location: Bremerton, WA.
Quote:
Originally Posted by Manolo47 View Post
So, for the sake of knowing, though I already calculated new resistor values for my 2nd. order HP/LP 100 hz crossover, what does one do in the sim schematic with the 2nd. R or C's in the model to simulate a 6db filter... thanks
To simulate a 1st-order filter, remove the component in the feedback position and replace the first input component with a wire.

Dave.
  Reply With Quote
Old 10th November 2018, 11:53 PM   #259
Kreisky is offline Kreisky  Italy
diyAudio Member
 
Join Date: Feb 2007
Location: paris
Quote:
Originally Posted by Joca View Post
if you are asking for the file Nelson posted before, here it is:

LX_MINI_V1R0.CIR - Google Drive
Thanks !
__________________
Marco
Cairn FOG2 - My_ref C - DIY speakers
  Reply With Quote
Old 11th November 2018, 02:28 AM   #260
Manolo47 is online now Manolo47  Puerto Rico
diyAudio Member
 
Join Date: Mar 2006
Location: San Juan, Madrid
Default Questions regarding the HP eq. section

I removed the upward and downward "humps" by replacing the 18.2k and 15k resistors with 2 - 1k resistors. Is this the right way to do It?

And there is a frequency downward slope towards the 20k response end; it is like -3db down at the end. Is this supposed to be that way also?

And I have not found a method to sum both diagrams....in the program...thanks
  Reply With Quote

Reply


LX-mini Crossover ArticleHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Lx-mini Analog Crossover Nelson Pass Analog Line Level 21 20th October 2018 01:37 PM
Analog Crossover for LX-mini Nelson Pass Multi-Way 1 7th July 2018 10:51 PM
AES article on the ultimate active crossover hahfran Analog Line Level 3 17th May 2016 05:39 PM
Mac Mini dual DAC crossover OzMikeH Digital Line Level 2 12th January 2009 11:11 PM
Mini Crescendo article carlhemm Solid State 6 4th December 2006 05:37 PM


New To Site? Need Help?

All times are GMT. The time now is 12:27 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki