Ph.D,
Couldn't find too much on this. However here are 2 links that *might* be of help:-
http://www.threshold-audio.com/discontinued.html
& this one is courtesy member "Mitja" from another thread:
http://www.rsvlonline.net/vintageamp/archiveamps.htm
The 2nd one is hosted by Jon Soderberg (formerly of Threshold) who now specializes in Threshold/Forte repair. He might be another good person to contact, if you haven't already. His home page appears to be:
http://www.rsvlonline.net/vintageamp
FWIW.
Couldn't find too much on this. However here are 2 links that *might* be of help:-
http://www.threshold-audio.com/discontinued.html
& this one is courtesy member "Mitja" from another thread:
http://www.rsvlonline.net/vintageamp/archiveamps.htm
The 2nd one is hosted by Jon Soderberg (formerly of Threshold) who now specializes in Threshold/Forte repair. He might be another good person to contact, if you haven't already. His home page appears to be:
http://www.rsvlonline.net/vintageamp
FWIW.