If I recall correctly, around 1980 a magazine published an article about Ralph, stating he used a Fender Twin.
No you don't.
No
NO
70s 80s is not very clear firstly. Is it 70s or 80s or 70s/80s? My only suggestion is Creedence Clearwater Revival and that you are thinking of 'Proud Mary'. NOTICE USE OF QUOTES TO HIGHLIGHT title.
A 50 amp breaker is an overcurent device.
Use the correct fuse and nothing else.
Yes you can
Yes.
If the computer is moden then use 5 amp and if the computer is older and smaller then use a 3 amp
No, they only use the power drawn from the service. The fact that is is 220 amp or 110 amp makes no difference. It is the load that is applied that determines the amount used.
A passive subwoofer doesn't have a built-in amp and will require the use of an amp.
If you have 100 amp wire, you can use it for a 60 amp circuit, or for any circuit of 100 amps or less. But if you have a 60 amp circuit, 60 amp wire is thinner and cheaper than 100 amp wire.