Pass X250.5 question for Nelson - 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 9th March 2005, 11:18 PM   #1
diyAudio Member
 
georgehifi's Avatar
 
Join Date: Sep 2003
Location: Manly Australia (Jewel of the Pacific)
Send a message via MSN to georgehifi
Default Pass X250.5 question for Nelson

Nelson is it possible to have the X250.5 with an unbalanced input impeadance of 200k instead of 11k if ordered from the factory?

Cheers George
__________________
Avatar : Production Lightspeed Attenuator
www.lightspeedattenuator.com
  Reply With Quote
Old 10th March 2005, 06:31 PM   #2
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
No, but you can put 189K in series with the + input and
ground the negative input (pins 1 and 3 of the XLR
connector.

Your gain will go down a bit.

  Reply With Quote
Old 13th March 2005, 09:20 PM   #3
uli is offline uli  Austria
diyAudio Member
 
Join Date: Dec 2002
Location: Vienna, Austria
Quote:
Originally posted by Nelson Pass
Your gain will go down a bit.

Kinda power follower or unity gain buffer?




Uli

__________________

'Jazz is not dead, it just smells funny' F.Zappa
  Reply With Quote
Old 14th March 2005, 06:26 PM   #4
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
It will still have some gain - not much, though.

More to the point, why would anyone need the 200K
input anyway? It will still take the same amount of
current to drive the amp to whatever figure you want.
  Reply With Quote
Old 15th March 2005, 07:37 PM   #5
diyAudio Member
 
georgehifi's Avatar
 
Join Date: Sep 2003
Location: Manly Australia (Jewel of the Pacific)
Send a message via MSN to georgehifi
Quote:
Originally posted by Nelson Pass
It will still have some gain - not much, though.

More to the point, why would anyone need the 200K
input anyway? It will still take the same amount of
current to drive the amp to whatever figure you want.

High source output impeadance that has to drive 2x amps .

Cheers George
__________________
Avatar : Production Lightspeed Attenuator
www.lightspeedattenuator.com
  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
Question for Nelson Pass Addicted Help!! Pass Labs 16 26th April 2007 06:12 PM
pass x250.5 a little defect... kyrochan Pass Labs 10 30th May 2006 11:19 PM
Pass X250 concept ? ANALOG GUY Pass Labs 32 17th February 2006 04:08 PM
Question for Nelson Pass thylantyr Pass Labs 6 7th April 2003 03:17 PM
Nelson Pass; Thanks, and a quick question please! mg16 Pass Labs 1 6th December 2001 06:09 PM


New To Site? Need Help?

All times are GMT. The time now is 03:42 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