I accidentally found another (cheap) isolation fix.
I have a Zanden 5000S DAC with a very microphonic tube...waiting for tube replacement. (It is so microphonic, that the bass the combination of my SF Strads and Velodyne DD-18 sub causes to tube to whistle loudly through my speakers.)
Solution? I use a pair of ankle sandbag weights (the kind people attach to their ankles to work out) and I flatten them out and place them underneath the Zanden.
The combination of sand tightly bound in a heavy duty, extra tick nylon ankle band means you get both:a) vibration insulation from the sand b) fairly firm foundation because the ankle band keeps the sand from continuously shifting.
Nothing else I have tried keeps the tube from whistling thru the speaker. Hope that helps someone else out there!
Lloyd
I have a Zanden 5000S DAC with a very microphonic tube...waiting for tube replacement. (It is so microphonic, that the bass the combination of my SF Strads and Velodyne DD-18 sub causes to tube to whistle loudly through my speakers.)
Solution? I use a pair of ankle sandbag weights (the kind people attach to their ankles to work out) and I flatten them out and place them underneath the Zanden.
The combination of sand tightly bound in a heavy duty, extra tick nylon ankle band means you get both:a) vibration insulation from the sand b) fairly firm foundation because the ankle band keeps the sand from continuously shifting.
Nothing else I have tried keeps the tube from whistling thru the speaker. Hope that helps someone else out there!
Lloyd