I just tried out (over the last week) 6 of the Iso Cups, in sets of 3. All my gear is on a 2" maple rack, on 2" maple blocks. The amps are on the floor, but also on maple blocks, in this case 4".
system details are here:
http://cgi.audioasylum.com/systems/2709.htmlThe first place I tried them was under the amps, but as has been my experience in the past with any thing soft under them or under the DAC for that matter, the sound got just too soft.
I then moved a set under the transport, in place of the Nordost Pulsar points I had been using there. OK, looks like a keeper. A bit more open. Not huge, but an improvement.
I then tried the other set in various spots, in each case replacing Herbie's Own Tender Feet (which in turn had replaced cork/rubber thingies):
- under the pre's maple block (the pre already resting on pricey Stillpoints/Risers, which it loves) - a keeper.
- under the transports maple block: yes, I like it.
- under the DAC's maple block: another winner.
In each case, it was a loss of hash and edginess, particularity in voices; slightly more detail but with quite a bit less grain. Recordings which were borderline harsh became more enjoyable and ultimately this is how I judge the value of any change. I have not noticed any loss of punch in these positions as I did under the amps.
Thank you for posting this timely review, I had gotten on the site to price the cost of adding more of these little critters, and my mind is fresh from trying them out in different positions. Your your approach to listening resembles mine, as does your general experience with the cups.
KP