Amplifiers weight


What does amplifiers weight has to do with performance?
im trying to decide between this 3 amps
parasound JC5 73 pounds, Anthem STR 60 pounds Michi S5 by Rotel 132 pounds 
I can get them around the same price 
my speakers is modified klipsch KLF 30
preamp is Michi P5 and a pair of SVS SB16 ultra Sony Hap Z1 and Cambridge Azur 851N
i really like the looks of STR amp 
128x128lordrootman
Thanks @cakyol , that was an interesting read.
Pass’ thoughts on weight vs. power and amplifier class, and the benefits of a suitably large power supply, seem logical but from the standpoint of sound quality there must be more to it since he continues to design new amplifier lines that apparently sound different/better than his previous amplifiers.
I’ve heard Wyred4Sound class D amps that sounded very good, maybe one of the best bang for the buck amps out there and a Wadia combo driving Vandersteens that sounded awesome. Both high power per pound values. Hey remember good old Bob Carver. He could make a 500 watt class G amp weighing about 15 pounds and sell it for under $1000 😂 (give or take) I love the guy, he made thousands off me in the 80’s
I have a VAC PA 80 80 tube amp that weights 70lbs and a class D amp that weighs 52 lbs
Listening pleasure per pound is very good!
I won't even mension how heavy my sub is!!