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.

Thanks Nelson
Thanks Nelson
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 15th April 2018, 12:24 AM   #1
nzlowie is offline nzlowie  Australia
diyAudio Member
 
Join Date: Jun 2015
Default Thanks Nelson

Hi Nelson

I know you're a very busy man and won't have time to answer lots of msg's so I understand if you just take the thanks part of this message!

First of all, I like countless others offer thanks and gratitude for the unselfish work you do for the diy audio community, too many times we see people with your skills just take and take, for me this is refreshing so thanks for being you.

I've just been watching a couple of your video seminars and realized you must have tried hundreds of amp configurations...... I've made a few amps over the years that have been in the diy arena, even though I could probably afford some of the really good gear I enjoy building and trying to optimize my system.
My current system uses 4 ACA's driven with minidsp for my mid/hf horns, a DSP bass amp drives the bass. I think it was zenmod who suggested I could replace the output caps for something better than electrolytic as we only needed FR down to 500hz, this improved things further.

Now comes the questions.....
I know the ACA was meant as a starter project, do you have any better designs you could share in the <5w range? My horn's are around 115db so very little power required.
I'd also like to replace the minidsp with your new xover, I realize it won't have DSP capability but will there be any way to tweak the FR for a non linear driver? Or in your opinion is it better to leave a few peaks and dips rather than eq the hell out of the signal? I like the minimalist approach, the less we interfere the better right?

Sorry msg got a bit longer than planned! Anyway keep up the good work we appreciate your support.

Regards Dave
  Reply With Quote
Old 15th April 2018, 07:05 PM   #2
Nelson Pass is offline Nelson Pass  United States
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
Thanks Nelson


Flattery will get you anywhere.....

Perhaps a nice single-ended version of a follower? Very easy to do.

Maybe ZM or Mike will put one up.

The first crossover coming does have EQ on top and bottom, as it was set
up for the LXmini. On the top, there is a notch to take out a peak in the
driver, and on the bottom there is boost at the lowest frequency, and
both of these are variable with choice of resistors and capacitors. This
one has fixed values, but I will have another one which is variable,
pretty much delivering the performance of the B5.

  Reply With Quote
Old 15th April 2018, 07:12 PM   #3
Zen Mod is online now Zen Mod  Serbia
Official Court Jester
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
Thanks Nelson
look no further than Mr. MR's MoFo
__________________
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa... by Mighty ZM
  Reply With Quote
Old 15th April 2018, 07:25 PM   #4
woofertester is offline woofertester  United States
diyAudio Member
 
Join Date: Jun 2011
Quote:
Originally Posted by Nelson Pass View Post


Flattery will get you anywhere.....

Perhaps a nice single-ended version of a follower? Very easy to do.

Maybe ZM or Mike will put one up.

The first crossover coming does have EQ on top and bottom, as it was set
up for the LXmini. On the top, there is a notch to take out a peak in the
driver, and on the bottom there is boost at the lowest frequency, and
both of these are variable with choice of resistors and capacitors. This
one has fixed values, but I will have another one which is variable,
pretty much delivering the performance of the B5.

This was the answer to my question the other day.
Attached Images
File Type: jpg B1_Schematic.jpg (189.7 KB, 877 views)
  Reply With Quote
Old 15th April 2018, 08:07 PM   #5
Michael Rothacher is offline Michael Rothacher  United States
AudioMaker.Tech
diyAudio Member
 
Michael Rothacher's Avatar
 
Join Date: May 2001
Thanks Nelson
Wow! With that sort of efficiency, you could get away with a 12V MoFo, maybe even battery powered. With a nice tube pre, Bob's your uncle.
Attached Images
File Type: jpg batt.jpg (442.5 KB, 804 views)
__________________
Visit AudioMaker.Tech
  Reply With Quote
Old 15th April 2018, 08:16 PM   #6
Zen Mod is online now Zen Mod  Serbia
Official Court Jester
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
Thanks Nelson
as I said , look no further
__________________
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa... by Mighty ZM
  Reply With Quote
Old 15th April 2018, 08:22 PM   #7
Vix is offline Vix  Yugoslavia
diyAudio Member
 
Vix's Avatar
 
Join Date: Nov 2003
Location: Somewhere on Planet Earth
Or, try F2 lite. Just like an ordinary F2, just replace the CSS withh the lightbulbs. With 19v or 24 v supply, maybe you could get a 2-3 w one. Super simple, has some gain, and it has magic
And yes, thank you Nelson for all amps and bright ideas
  Reply With Quote
Old 15th April 2018, 08:37 PM   #8
Michael Rothacher is offline Michael Rothacher  United States
AudioMaker.Tech
diyAudio Member
 
Michael Rothacher's Avatar
 
Join Date: May 2001
Thanks Nelson
Attached Images
File Type: gif simple follower.gif (102.3 KB, 788 views)
__________________
Visit AudioMaker.Tech
  Reply With Quote
Old 15th April 2018, 08:52 PM   #9
Zen Mod is online now Zen Mod  Serbia
Official Court Jester
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
Thanks Nelson
for bass duty , increase C1 to 10mF

for squawker duty , leave it as is ..... or use adequately calculated solid cap
__________________
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa... by Mighty ZM
  Reply With Quote
Old 16th April 2018, 12:53 AM   #10
nzlowie is offline nzlowie  Australia
diyAudio Member
 
Join Date: Jun 2015
Quote:
Originally Posted by Nelson Pass View Post


Flattery will get you anywhere.....

Perhaps a nice single-ended version of a follower? Very easy to do.

Maybe ZM or Mike will put one up.

The first crossover coming does have EQ on top and bottom, as it was set
up for the LXmini. On the top, there is a notch to take out a peak in the
driver, and on the bottom there is boost at the lowest frequency, and
both of these are variable with choice of resistors and capacitors. This
one has fixed values, but I will have another one which is variable,
pretty much delivering the performance of the B5.

Nothing wrong with giving credit or thanks where it's due. Too many of us just take without giving a thought to the work that happens in the background. This goes for many aspects of life.

Ok, will keep watching with interest.

Cheers
  Reply With Quote

Reply


Thanks NelsonHide 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
Papa Nelson Big Mu Amp Rembulan Pass Labs 3 29th November 2014 12:50 AM
Half-Nelson Amp wrenchone Pass Labs 36 25th September 2011 08:54 AM
Thank you Nelson kilowattski Pass Labs 19 28th July 2008 04:20 AM
Thanks Nelson tedr Pass Labs 1 18th January 2008 07:15 PM
Nelson Stefano Pass Labs 28 9th May 2003 06:32 AM


New To Site? Need Help?

All times are GMT. The time now is 09:19 PM.


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