agear OP
1,223 posts
11-10-2016 12:44am
Are those NASA-spec springs I spy?
http://www.solid-tech.net/products/discs-of-silence-4537455
Finally! Someone was smart enough to copy my original Nimbus Sub Hertz Isolation platform design; Nimbus used a single vertical air spring with a lateral support spring system - a series of small springs. The difference being the Nimbus used only ONE spring total, whereas other systems are forced (due to the technical difficulty of using one spring) to use multiple springs (to obtain sufficient lateral support) which raises Fr of the iso system. The best Fr achievable with multiple vertical springs is about 3 Hz. Which it’s bad, but it’s not anywhere near as good as 0.5 Hz. The reason 0.5 Hz is important is because the peak Earth crust motion is between 0 Hz and 2 Hz. That’s why the Nimbus Unipivot at 0.5 Hz Fr is still the best, even 20 years later. Hel-loo! Addendum: for speakers the Fr of the isolating device is not critical since the lowest frequency that needs to be isolated is what, 25 or 30 Hz?
1,223 posts
11-10-2016 12:44am
Are those NASA-spec springs I spy?
http://www.solid-tech.net/products/discs-of-silence-4537455
Finally! Someone was smart enough to copy my original Nimbus Sub Hertz Isolation platform design; Nimbus used a single vertical air spring with a lateral support spring system - a series of small springs. The difference being the Nimbus used only ONE spring total, whereas other systems are forced (due to the technical difficulty of using one spring) to use multiple springs (to obtain sufficient lateral support) which raises Fr of the iso system. The best Fr achievable with multiple vertical springs is about 3 Hz. Which it’s bad, but it’s not anywhere near as good as 0.5 Hz. The reason 0.5 Hz is important is because the peak Earth crust motion is between 0 Hz and 2 Hz. That’s why the Nimbus Unipivot at 0.5 Hz Fr is still the best, even 20 years later. Hel-loo! Addendum: for speakers the Fr of the isolating device is not critical since the lowest frequency that needs to be isolated is what, 25 or 30 Hz?

