Citation 12 input sensitivity - 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 16th September 2012, 07:55 PM   #1
diyAudio Member
 
Join Date: Sep 2012
Question Citation 12 input sensitivity

Hello. I'm new to the forum and to DIY audio. I recently discovered the work of Nelson Pass through a friend. Mr Pass, thanks for all you're doing!

Now I'm building a (Nelson Pass' Mosfet) Citation 12 to pair with my Sonus Faber Minima (4.5" woofer, low sensitivity, not-so-easy load - kill my Naim Nait 5i on the low freqs).

As I don't own a preamplifier yet I'm wondering whether the input sensitivity of the Citation 12 will allow for direct connection to a source (CD, DAC...) or through a no-gain buffer like the B1.

If the above is possible and before I build the buffer/preamp can I use a pot (maybe 25K log?) between the source and the power amp to regulate the volume or will it somehow compromise the output signal of the source?

Thanks in advance.

Cristian

Last edited by Cristian Vidmar; 16th September 2012 at 08:49 PM.
  Reply With Quote
Old 16th September 2012, 08:53 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
Pa wrote +/-30V clipping , so that means 60Vpp

gain is 10K/470~21

60Vpp/21=2V86pp

2V86pp/(2x1,41)=1V RMS
__________________
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 17th September 2012, 08:57 AM   #3
diyAudio Member
 
Join Date: Sep 2012
Thanks Zen Mod, that helped!
  Reply With Quote
Old 8th January 2013, 04:49 PM   #4
diyAudio Member
 
Join Date: Sep 2009
hello friends,
I bought a plate amp citaion 12 on Ebay, the seller is not sure about it. I wonder if the transistor Q4 should be glued to the heatsink for thermal control?

Already many thanks for the information

High Quality IRFP240 Push Pull Audio Power Amplifier Kit Based on Citation 12 | eBay
  Reply With Quote
Old 8th January 2013, 05:40 PM   #5
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
all you need to know is on FW site , in Articles
__________________
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 8th January 2013, 05:58 PM   #6
diyAudio Member
 
Join Date: Sep 2009
MOD ZEN Sorry, what was the site? My English is bad, I can not understand everything that is written in the original text Click the image to open in full size.
In the link I provided, there is a simple scheme, only wanted to know if Q4 must be thermally connected to the heat sink ...High Quality IRFP240 Push Pull Audio Power Amplifier Kit Based on Citation 12 | eBay
  Reply With Quote
Old 8th January 2013, 07:53 PM   #7
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
read :

FIRST WATT

FIRST WATT ARTICLES

http://www.firstwatt.com/pdf/art_mos_citation.pdf
__________________
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 10th January 2013, 10:15 AM   #8
diyAudio Member
 
Join Date: Sep 2009
Very good Zen Mod, grateful for the advice! Congratulations .....
.
  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
Simulation - Pass MF-12 MOSFET Quasi Comp (Original) Modification for HK Citation 12 PB2 Pass Labs 30 14th March 2013 05:31 PM
Simulation - Pass MF-12 MOSFET Fully Comp Modification for HK Citation 12 PB2 Pass Labs 0 10th May 2011 03:11 AM
Citation 12 help paco161 Solid State 173 24th April 2009 12:25 PM
Citation 12 nickgreek Solid State 6 22nd September 2003 03:20 AM


New To Site? Need Help?

All times are GMT. The time now is 09:56 AM.


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