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Old 10th March 2005, 11:52 AM   #1
diyAudio Member
Join Date: Aug 2004
Location: Italy
Default Threshold 4000 "polarity"

(sorry for my english)
I have two simply questions:
1) Was it inverting or not-inverting? (I haven't owner's manual)
2) I think it's time to replace the four original big capacitors: what is the minimum possible value for each ? ( numbers are illegible)
Thanks advanced for your time

P.S.: after 25 years( or more?) the amp is "perfect".
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Old 10th March 2005, 06:39 PM   #2
The one and only
Nelson Pass's Avatar
Join Date: Mar 2001
All the Threshold and Pass Labs amps/preamps are non-inverting.

Try 15,000 uF minimum at 75 volts. The big thing is to fit the
can in the same diameter bracket with similar height.
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Old 11th March 2005, 11:10 AM   #3
diyAudio Member
Join Date: Aug 2004
Location: Italy
Thank you very much, Mr. Pass .
You are really "the one and only"!!
best regards from Venezia
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