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 6th February 2020, 09:57 PM   #671
PB2 is offline PB2  United States
diyAudio Member
 
PB2's Avatar
 
Join Date: Sep 2004
Location: North East
This is a very elegant design and it looks like it could be applied to many other designs.
The Low pass includes a peaked (or not by adjustment) high pass for subsonic rejection
and assisted alignments such as B2=>B4 or B4=>B6, baffle step compensation and a
2nd order low pass. The high pass section is 2nd order with a notch that could be realigned
for stiff cone drivers that require a higher Q notch.
Very nice that it does not require OP amps and uses low cost JFETs.

Is there a circuit board currently available?
  Reply With Quote
Old 6th February 2020, 11:39 PM   #672
Nelson Pass is offline Nelson Pass  United States
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
LX-mini Crossover Article
Yes, its in the store under "analog crossover". Topology is correct, just
stuff it with the lx-mini resistors and caps.
  Reply With Quote
Old 7th February 2020, 01:27 AM   #673
Junm is offline Junm  Philippines
diyAudio Member
 
Junm's Avatar
 
Join Date: Dec 2008
Location: Dau
Send a message via Yahoo to Junm
Quote:
Originally Posted by mkc View Post
Hi Junm,

These dual-fets seems almost to nice to be used for line-level followers in a crossover.

If it were me and depending on how many you have, I would try to sell them and see if I couldn't get enough money to buy the analog crossover kit from the Diyaudio store.

Mogens
I tried to sell those here before but nobody wants it so i decide to use it on my diy projects. I have more than 40 pcs of it but mostly are K grade.
  Reply With Quote
Old 7th February 2020, 05:16 PM   #674
Nelson Pass is offline Nelson Pass  United States
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
LX-mini Crossover Article
Then they will make great diff pairs - high Idss is not an issue when diff pairs
are biased at a lower figure by a constant current source.
  Reply With Quote
Old 7th February 2020, 08:43 PM   #675
PB2 is offline PB2  United States
diyAudio Member
 
PB2's Avatar
 
Join Date: Sep 2004
Location: North East
Quote:
Originally Posted by Nelson Pass View Post
Yes, its in the store under "analog crossover". Topology is correct, just
stuff it with the lx-mini resistors and caps.
I don't see it in the DIYaudio store, perhaps they deleted it?
  Reply With Quote
Old 7th February 2020, 08:51 PM   #676
Soundhappy is offline Soundhappy  France
diyAudio Member
 
Soundhappy's Avatar
 
Join Date: Oct 2012
Location: Montpellier near Mediterranean Sea France
Analog Crossover Network – diyAudio Store
__________________
class A amplifiers with full range speakers
sings like angels in heaven
  Reply With Quote
Old 8th February 2020, 02:31 PM   #677
PB2 is offline PB2  United States
diyAudio Member
 
PB2's Avatar
 
Join Date: Sep 2004
Location: North East
Thanks it is in the kit section - I was looking in the PCB section.
  Reply With Quote
Old 14th February 2020, 10:51 PM   #678
2 picoDumbs is offline 2 picoDumbs  Australia
diyAudio Member
 
2 picoDumbs's Avatar
 
Join Date: Sep 2013
LX-mini Crossover Article
Hi Nelson
I hope my memory is accurate here.
In an old BAF talk you showed how the circuit could be used as a straight EQ, and you showed the frequency response.
I measured the frequency response of the Loudness button on an old (1994) Pioneer amp. It was virtually a symmetrical smiley face.
Would a loudness circuit be built by simply adding a high q high pass filter and a high q low pass filter or would it be done differently?

I think I prefer the idea of this method more than possibly putting in a broad notch in the mid range. Whenever I have played around with mid range eq even if I have improved the response I have noticed a loss in resolution and detail, I guess our ears are very good at noticing subtle differences in that region.
__________________
"If you leave this point unattached to some circuitry, an ideal constant current source will emit a small lightning bolt which will travel until it connects to something." Nelson Pass
  Reply With Quote
Old 15th February 2020, 05:45 PM   #679
Nelson Pass is offline Nelson Pass  United States
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
LX-mini Crossover Article
As there is typically lots of extra gain in the line level chain, it's routine to use
the broad midrange notch. It has the advantage of simplicity and can be
done with simple buffers and even passively.
  Reply With Quote
Old 16th February 2020, 04:07 AM   #680
2 picoDumbs is offline 2 picoDumbs  Australia
diyAudio Member
 
2 picoDumbs's Avatar
 
Join Date: Sep 2013
LX-mini Crossover Article
I will try it.
__________________
"If you leave this point unattached to some circuitry, an ideal constant current source will emit a small lightning bolt which will travel until it connects to something." Nelson Pass
  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 24 15th December 2019 01:43 AM
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 04:59 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright ©1999-2020 diyAudio
Wiki