Ok so I got the multiple sorbothane discs in the mail box to trial different combinations. My amp only weights some 13 Kg (40 Watts) but had to try with 1 or 2 layers of sorbothane discs (4.5 Kg per disc) as by the seller's max weight capacity for one disc I was at the limit... Plus the fact that weight is distributed unevenly in the amp. Anyway, I first tried with 2 layers of sorbothane disc per feet.
Shocking ! My 2-D sound became 1-D and my highs thin and "hairy" while the bass was "boomy"; ugly ! Tried with one layer; less accentuated but to a result that sounded like nothing. I was afraid something happened to my stylus in the meantime... So I took the sorbothane discs off and thank God, got my good sound back. So on my configuration, such isolation under the amp is a no-no.
So that is true, what is happening there, at the bottom/feet contact of the amp with it's support do hugely affect the playback sound. Mind you that I have learn to love the "decoupling" design and principle of "using" the good resonances of both my SME3009 tonearm and Thorens TD14x-16x turntable (rather than to struggle with over damping of everything) and I did my tweaks in that sense...
- Cart Denon DL-102 in bakelite Ortofon SPU 'G' type headshell
- TA SME 3009 'Improved' converted in heavy mass with detachable headshell
- TT Thorens TD160 'E' totally tweaked driven by an 'Eagle & RoadRunner' PSU & tachometer combo
- Matts top to bottom: leather, cork, felt & 12" vinyl
- Pre-amp 'Modulis' Isem
- Amp 'Exampli' Etalon 2x40W
- Speakers 12" Leak 'Sandwich' first generation creatively recapped