Ultimate Pass amp. - diyAudio
Go Back   Home > Forums > Amplifiers > Pass Labs

Pass Labs This forum is dedicated to Pass Labs discussion.

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 23rd January 2013, 12:57 PM   #1
diyAudio Member
 
Join Date: Jan 2013
Default Ultimate Pass amp.

Hi everybody

I am new in here but have been watching for a while

During the years have I been building the A40, A75, Bride of son of zen and B1 Now I am in the situation that I have to built another amp. (The last one if such really exist

I have had the XA 30.5 and I am looking for a sound like the XA 30.5 and the strength of A75, to be honest is it to long ago I have had the A75 to compare it to the XA 30.5 but what is printed in my soul is the feeling of endless power with a total black background.

A very good friend of mine have just finished the BA-3 single ended version and it is just missing something in the voices and upper midrange like everything has been pulled into the speakers again.
I do not know if it is because it is not DC coupled or maybe I am spoiled with the XA 30.5

Then I was looking at the F5 turbo in balanced version but it seems hard to find others who have done this at the moment.

At the moment I think I will go the A75 way but if you guys have other suggestions I am full open.

Have I missed something or is the A75 still the ultimate DIY Pass amp ?

Thanks

Best regards
Chris
  Reply With Quote
Old 23rd January 2013, 01:51 PM   #2
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
what power range you need ?
__________________
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 23rd January 2013, 02:09 PM   #3
diyAudio Member
 
Join Date: Jan 2013
Hi

Not much the speakers are these DIY:

http://www.humblehomemadehifi.com/do...Mk-II_copy.pdf

In the area of 30Watt kl. A is fine I think.

I have just ordered the big Hifi2000 cabinet 500mm deep so this is the limit when it comes to heat sink.

The only "problem" with the A75 is that it has to be on all the time in order to perform on its max, I can hear the difference up to a week after cold conditions.
I don´t know if this is the front-end or output stage or both but as I do not have my own new clear power plant in the backyard (yet then my plan was to have it on all the time and then make a relay for decreasing the bias to a minimum when not in use and then let the front-end be warm at all time.

What do you think ?

Thanks

Chris
  Reply With Quote
Old 23rd January 2013, 02:23 PM   #4
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
Quote:
Originally Posted by cringvig View Post
....... I can hear the difference up to a week after cold conditions.........

What do you think ?

Thanks

Chris
I think you're wakoo

Quote:
Originally Posted by cringvig View Post
.........
In the area of 30Watt kl. A is fine I think.

......
either F6 or appropriate dimensioned BA-3 ballanced

they're at least my fave in last time , considering your power range
__________________
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 23rd January 2013, 04:37 PM   #5
diyAudio Member
 
Join Date: Jan 2013
Wakoo
Carefull mate, you think you are safe behind the curtains but I have visa to go behind the iron curtains

I have not been looking closer to the F6 but as I understand is there a long way for the F5 in the balanced turbo version.

Before was my first choice the BA-3 in balanced version but i am not sure that my head can handle the capacitor in the output of the front-end

Have anyone tried how big difference the capacitor can make in this circuit ?

Br
Chris

Last edited by cringvig; 23rd January 2013 at 04:58 PM.
  Reply With Quote
Old 23rd January 2013, 05:34 PM   #6
flg is offline flg  United States
diyAudio Member
 
flg's Avatar
 
Join Date: Jul 2005
Location: North East
Further reading of Pass http://en.wikipedia.org/wiki/Nelson_Pass is suggested
https://passlabs.com/technical-articles/
http://www.passdiy.com/projects.htm
Etc...
__________________
"It was the perfect high end audio product: Exotic, inefficient, expensive, unavailable, and toxic." N.P.

Last edited by flg; 23rd January 2013 at 05:38 PM.
  Reply With Quote
Old 23rd January 2013, 05:49 PM   #7
diyAudio Member
 
Join Date: Jan 2013
??? Because I am putting stupid questions on the board or ?

I mean I don´t throw one line question about "how to" but trying to get input for the selection of the next project.

I am a newbie on the board but I have been building for many years and maybe I could come with some inputs regarding other things or details.

When it comes to the capacitor then I have tried many cheap and expensive in the B1 and just want to know if others had done the same in the BA.

But thanks guys, for the warm welcome.

Chris
  Reply With Quote
Old 23rd January 2013, 06:24 PM   #8
biju55 is offline biju55  India
diyAudio Member
 
biju55's Avatar
 
Join Date: Jul 2011
Location: Kuwait and India
Send a message via Skype™ to biju55
why cant you choose Aleph 60 ? .
  Reply With Quote
Old 23rd January 2013, 07:03 PM   #9
diyAudio Member
 
sakellogg's Avatar
 
Join Date: Nov 2008
Location: dixon ill
chris. welcome.

i hope the thanks wasnt sarcastic. if so.. welcome anyway.

you asked for opinion so here is my humble one.....
the caps you tryied, did you hear any diffrence? if so and you think it will bother you dont do that amp.

if you have fond memories of A75 and, belive that is the best you have heard, build it.
it will give you a 0 point to compair others to.
you can then build others to compair too.

just for info.....the "last one" dose not exist!
__________________
I'm not crazy, my mother had me tested
  Reply With Quote
Old 23rd January 2013, 07:20 PM   #10
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
Quote:
Originally Posted by cringvig View Post
Wakoo
Carefull mate, you think you are safe behind the curtains but I have visa to go behind the iron curtains

I have not been looking closer to the F6 but as I understand is there a long way for the F5 in the balanced turbo version.

Before was my first choice the BA-3 in balanced version but i am not sure that my head can handle the capacitor in the output of the front-end

Have anyone tried how big difference the capacitor can make in this circuit ?

Br
Chris
do not worry - you don't need visa for my neck of wood

whatever - I don't think that you need to worry about cap in signal chain , if BA-3 balanced is in question ; don't be so sure that there are none in XA30.5 , which you cherish

having caps in that sort of circuit (BA3 ball) doesn't do much harm ; nature of the Beast , in fact
__________________
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

Reply


Hide 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
The ultimate rumble filter - far more effective than just a high pass filter! monty78pig Analogue Source 29 26th July 2013 11:15 AM
Pass Labs amp combination for Thiel speakers, need Mr Pass' advice ! And everyone... JulienG Pass Labs 80 14th February 2013 06:22 PM
Ultimate Twin TDA1541a Non-oversampling DAC with tube buffer & reclock set....... tube-lover Vendor's Bazaar 771 13th September 2010 12:05 AM
Ultimate Active Low Pass Filter toshiba_nz Analog Line Level 0 26th May 2010 08:25 AM
Amperes of Pass amps & Pass for ESL rick57 Pass Labs 3 4th August 2005 04:28 PM


New To Site? Need Help?

All times are GMT. The time now is 08:27 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2