A very revealing test for LAST is to treat only the first half of a record cut, and then while playing that cut, try to determine where the treated groove section ends, and the untreated portion beings – without looking at the position of the cartridge on the record cut. After trying this simple test and after having heard the effects of LAST on other discs, many audiophiles are able to detect whether a record has been treated with LAST, even though they have never listened to that record before.
Len Hupp
