my aries is on a salamander rack on a wooden floor in a fairly small room. I did need some isolation (desperately) back when I had a p25, but only when I moved up in cartridges from a grado master (around 4.5mV I think) to a grado statement at .5mV. The higher end cart on the planar required the isolation but when I installed the Aries it was not at all as essential (maybe due to the weight of the aires with it's motor.) I could hear SOME improvement when I put the isolation back in to test things, so I do still use it.
btw-
I'm using 2 small bicycle inner tubes to isolate. 1st I tried them under a piece of medium density fibreboard ("mdf") as recommended by some folks; i.e. the tubes on the top salamander shelf, the mdf on the tubes, the tt on the mdf. I didn't like the sound so I replaced the mdf board with an extra salamander shelf I had (a much harder platform then the mdf), and voila! This worked better than some expensive iso platforms I had auditioned; and being barely visible it's way nicer looking.
btw-
I'm using 2 small bicycle inner tubes to isolate. 1st I tried them under a piece of medium density fibreboard ("mdf") as recommended by some folks; i.e. the tubes on the top salamander shelf, the mdf on the tubes, the tt on the mdf. I didn't like the sound so I replaced the mdf board with an extra salamander shelf I had (a much harder platform then the mdf), and voila! This worked better than some expensive iso platforms I had auditioned; and being barely visible it's way nicer looking.