My 90 lb. McCormack amp uses sorbothane feet at the front of the amp, and a single spike at the rear-- sounds contradictary, but it works very well. In your case, you could do this with vibrapods (or something similar) at the front and single or double cone spikes at the rear. As noted, Steve McCormack designed a system like this into ALL his amps-- and Steve McCormack was a pioneer in vibration control, eg he "invented" the famous "Tiptoes". I also put my amp on a Sanus spiked amp stand (from Audio Advisor) that will easily handle a 120 lb. amp. Cheers. Craig.
