X250.5 with CJ Preamps - 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 24th September 2007, 09:39 PM   #1
dpac996 is offline dpac996  United States
diyAudio Member
 
Join Date: May 2006
Default X250.5 with CJ Preamps

Hello. I have a late model X250.5 and I am currently in pre-amp search mode. I am using the X250.5 with a Promethius "Ref4" TVC and i'm getting excellent results...(source is marantz sa11 and i'm running xlr's all the way)...but the "what ifs" are creeping in and i'm tempted to pull the trigger on some Conrad Johnson preamps (CT6 or 17LS)

speaks are dynaudio contour s3.4 (avg sensitivity moderate current hogs)

Pre's that i'm interested in:
CJ CT6 Pre Zout is 850 ohms single ended...no XLR...
17LS very similiar...

I was wondering:
1) is there an obvious mismatch or is this blown out of proportion by the "10x rule of thumb" of load to source ratio jargon...

2) will there be any real world losses by running the amp single ended (with xlr jumpers of course).

3)any user experiences out there with this combo??


BTW an LS15 w/600 ohms balanced out seems to run the amp "just fine"...



BTW, are there any fuses in this beast? I popped the hood and could not see anything obvious...I love the simple neat layout of the MOSFET follower PCBs mounted directly to the massive heatsinks...

Regards,
Dave
  Reply With Quote
Old 25th September 2007, 04:17 PM   #2
dpac996 is offline dpac996  United States
diyAudio Member
 
Join Date: May 2006
Lightbulb CJ/Pass compatability

Well I guess it's out of place to post a COTS compatability question to the DIY forum !!
  Reply With Quote
Old 25th September 2007, 08:58 PM   #3
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
We recommend the CJ without hesitation. The output impedance
is not an issue, nor is the single-ended output.

  Reply With Quote
Old 26th September 2007, 04:00 PM   #4
dpac996 is offline dpac996  United States
diyAudio Member
 
Join Date: May 2006
Thanks!!
  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
X250.5 and Magneplanar 20.1 skidave Pass Labs 20 6th November 2008 08:39 PM
X250.5 question aljordan Pass Labs 3 29th May 2008 08:25 PM
Has anyone ever modified a X250.5? mert Pass Labs 64 19th March 2008 06:23 PM
X250.5 rdietzel Pass Labs 3 6th March 2008 09:39 PM
X250 review Duck-Twacy Pass Labs 1 6th April 2003 08:26 PM


New To Site? Need Help?

All times are GMT. The time now is 07:21 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