I have carefully tested the Mat on my Garrard 301 / SME M2 12R /SPU 90th Anniversary, and also on Acoustical 2800 / SME 3012-1 / SPU Gold. I can only say this thing is a little miracle ! The sound improvement is not spectacular, but it is clear audible. The sound is quicker, more spacious and floats free from the speakers in the air. So, I can only recommend it absolutely.