Well built but rather lifeless sounding. I speak as an ex-sme owner. Ironically they sound much better with non-sme arms such as triplanar and graham and I have heard the 30 with both of those arms and it sounded much better. The 20 is a big step down. The 10 can easily be bettered by much cheaper decks. They sound the opposite of the yorke which is more fleet of fot and alive with better bass and timing.
