which amp would suit these speakers? - Page 2 - 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 17th February 2013, 03:07 AM   #11
bk856er is offline bk856er  United States
diyAudio Member
 
Join Date: Feb 2011
Zen Mod and 6L6 - just to verify, both of you are recommending a mild F5T suitable for a 4U chassis, correct?

Any special PSU or trafo considerations to maintain interchangeability across those other designs (rail voltage, VA, etc.)?

Yes - very cool and I do plan to experiment!

BK
  Reply With Quote
Old 17th February 2013, 03:45 AM   #12
diyAudio Member
 
Join Date: Feb 2009
Quote:
Originally Posted by bk856er View Post
Looking to build my first Pass amp to drive some 2-way speakers (Sierra-1 NrT from Ascend). Some specs below.

Any specific suggestions? Would the standard F5 have enough grunt?

Bonus points for something that the 4U Deluxe chassis could handle.

BK

Click the image to open in full size.

Click the image to open in full size.
hmmm. without having read this tread,
a F5 with higher bias. f.ex 32V rails and 3.5A bias will drive this speakers to nirvana and then some
  Reply With Quote
Old 17th February 2013, 03:50 AM   #13
diyAudio Member
 
Join Date: Feb 2009
Quote:
Originally Posted by Zen Mod View Post
yup

mild F5T is right word ...... and choice
seams i agree with the myghty ZM this time too
i see that 6L5 agree also

BTW: i have speakers that performe like this.
and i use a F5 with high bias and normal voltage. this gives me about 35W class A at 6ohm. and about 50W class A/B at 4ohm.

Last edited by AudioSan; 17th February 2013 at 03:58 AM.
  Reply With Quote
Old 17th February 2013, 04:05 AM   #14
diyAudio Member
 
Join Date: Feb 2009
Quote:
Originally Posted by bk856er View Post
Zen Mod and 6L6 - just to verify, both of you are recommending a mild F5T suitable for a 4U chassis, correct?

Any special PSU or trafo considerations to maintain interchangeability across those other designs (rail voltage, VA, etc.)?

Yes - very cool and I do plan to experiment!

BK
+/-32V rails. (24VAC) 300+VA pr ch.
that will do the job
  Reply With Quote
Old 17th February 2013, 05:04 AM   #15
6L6 is offline 6L6  United States
diyAudio Member
 
6L6's Avatar
 
Join Date: Oct 2010
Location: Denver, Colorado
If you want interchangeability as I was hinting at, you will want +/- 24v rails. (which requires a 18v+18v transformer.)

However, there really is no wrong answer here is you are wanting to make a one-off amp. A F5C or T with slightly hotter rails will be really nice with your speakers.
  Reply With Quote
Old 23rd February 2013, 06:53 AM   #16
bk856er is offline bk856er  United States
diyAudio Member
 
Join Date: Feb 2011
So this is the current build plan:

- store deluxe 4U chassis
- 1x Tea-Bag PS board with 8x 27kuF caps
- 2x Tea-Bag F5T convertible boards
- 2-pair Fairchild FQA output devices/channel + diodes + cascode
- SumR 800VA 2x24V transformer - 32V rails
- bias to 4U heatsink abilities (move to 5U as last resort)

Chassis and boards are already on hand!

Any additional feedback is welcome.

BK
  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
Amp to suit Mission 770 speakers hey_homes Multi-Way 16 3rd July 2012 10:07 AM
What would suit the best ? aft Pass Labs 2 2nd March 2009 12:45 AM
What would suit best ? aft Solid State 0 1st March 2009 04:25 PM
Can I modify speakers to suit receiver BarcodeBob Multi-Way 4 21st June 2006 02:56 AM
Large Heatsinks anyone (probably suit a high power or class a amp) Rixsta Pass Labs 19 20th May 2004 09:22 AM


New To Site? Need Help?

All times are GMT. The time now is 07:16 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