Amplifiers weight

mitch2
Geoff, how many degrees of freedom do you consider your springs have? Typically, a spring is thought to operate in only one degree of freedom, in the case of a vertical spring it would be the z direction. However, depending on the slenderness of the spring (i.e., length vs. diameter), and the weight of the object supported, perhaps a torsional force could allow the spring to rotate. I am curious how the isolation provided by your springs compares to an elastomer type spring such as the Herbies products.

>>>My springs isolate primarily in the vertical direction 🔝 only, but there can be some rotational 🔄 isolation depending on how the system is set up. But simple springs like mine offer no isolation in the horizontal plane 🔛. That’s why a lot of folks use roller bearings AND springs to get isolation in all six directions or most of them anyway. Springs should be selected based on mass of component and the whole shebang should have a very low resonant frequency, 2 or 3 Hz is very good, below 2 Hz even better as there’s a lot of Earth motion in the range 0-5 Hz. I suspect MOST of the vibration especially for the basement or first floor is in the vertical direction. 🔝 So why pay for a Mercedes when a Volkswagen will suffice? 

wolfie62
I have 2” granite sides and bass plate on my amp. My amp weighs 245 lbs. It’s the best amp ever made, bar NONE! The weight of an amp determines its quality. One of the major criteria all should use!

>>>>>That statement is patently false and I can prove it. Isolate any amp, even a very heavy one and it will sound better AND weigh less. It’s pure physics. Case closed. Although there is some advantage to dead mass inertia the whole house is shaking due to seismic type energy and everything in the house is shaking with it. You can’t fool Mother Nature. 

I reckon you guys ain’t heard of the ultra-low mass amp craze that’s sweeping the nation. I use an ultra-low mass portable CD player with headphones. Total mass less than two pounds. No big honking transformer, or big honking capacitors, monster power supply, no big old power cord, no fuses, no interconnects or big honking speaker cables. Or their attendant noise and distortion. No more pencils, no more books, no more teacher’s dirty looks. 🤨

Isolate it. Then it won’t weight so much. 🤗