Not sure how long this has been about but can't find any mention of it already so...
http://www.tech21nyc.com/psa_1_1.html
"Our popular SansAmp PSA-1 underwent an internal redesign to accommodate the use of improved, more efficient and cost effective parts in order to preserve its original price"
Wonder if it sounds the same as the PSA-1.
Anyone tried both the old one and the new one?