Nelson Pass; Thanks, and a quick question please! Nelson Pass; Thanks, and a quick question please! - diyAudio
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.

Nelson Pass; Thanks, and a quick question please!
Nelson Pass; Thanks, and a quick question please!
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
Thread Tools Search this Thread
Old 6th December 2001, 12:50 AM   #1
mg16 is offline mg16
diyAudio Member
Join Date: Nov 2001
Location: western pa
Just wanted to let you know that your excellent sounding DIY projects are greatly appreciated here. I have been using your Bride of Zen preamp for several years, and it's made a major improvement in my sound system.
Will try to build your Zen amps for my Klipsch Lascalas soon.
Thanks for making these available to the DIY community.

Quick question regarding the original Bride of Zen preamp:

Is there anything to be gained sonically by increasing the power supply voltage to say, 120 vdc regulated, and doubling the 40 ma. bias current through the IRF mosfets? If the mosfets were then biased at 40 volts,(80 volts dropped across drain resistor R104), would the higher voltage swing,(headroom),ability be worthwhile?
I read in your Zen article in AA, that these IRF devices operate better when operated at higher current levels.
Naturally, heatsinks on the mosfets, and higher power resistors/higher voltage caps,& a bigger transformer would be needed.
Thanks Again!
  Reply With Quote
Old 6th December 2001, 06:09 PM   #2
Nelson Pass is offline Nelson Pass  United States
The one and only
Nelson Pass's Avatar
Join Date: Mar 2001
Nelson Pass; Thanks, and a quick question please!
You can lower the distortion a bit with this,
and it does open up the sound somewhat, but
you'll have to think in terms of higher wattage
resistor off the Drain and maybe some more heat
sinking on the transistor, not to mention
capacitor ratings and a new power supply.

Perhaps you should simply consider an active current
source in parallel with the Drain resistor, or even
making a miniature version of the Zen amp, but with
the 510's or 610's.
  Reply With Quote


Nelson Pass; Thanks, and a quick question please!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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Question for Nelson Pass Addicted Help!! Pass Labs 16 26th April 2007 06:12 PM
A quick question about all pass networks. 5th element Multi-Way 8 3rd April 2007 01:01 PM
Pass X250.5 question for Nelson georgehifi Pass Labs 4 15th March 2005 07:37 PM
My opinion on Pass Labs and Mr. Pass (Nelson) himself b_online Pass Labs 11 21st May 2003 12:39 AM
Question for Nelson Pass thylantyr Pass Labs 6 7th April 2003 03:17 PM

New To Site? Need Help?

All times are GMT. The time now is 02:53 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio