That link seems to show how to wire cables - but not specifically how to use unbalnced OP for balanced IP.

Could buy mixer I guess but trying to avoid more gear.

http://www.jensen-transformers.com/an/an003.pdf

Shows this I think, and seems to suggest some benefit from connecting unbalanced to balanced.

http://www.soundonsound.com/sos/1994_articles/aug94/groundloops.html

is also quite useful on the subject in general.

...still cant figure out why it used to be just fine though.

TOm