The rule for amplifier current is very simple, and yes, the figures we are dealing with here are very large.
Add up the value of all of the fuses fitted in the amps and then add 10%, and go for the next prefferred value up of main fuse - this is then the amount of current required in a worst case scenario.
as an example, if one of the amps has 2x 40A fuses and the other amp has a 35A fuse, and you have a small sound processor fitted with a 15A fuse
40 + 40 + 35 + 15 = 130 + 10% = 143
as they do not make a fuse of 143A, the next one up would be 150A and this would be the main fuse. All cabling up to this fuse must exceed this rating by at least double (in this example 300A) and the cables going from any distribution blocks to the amps must also exceed the ratings of the fuses on each.
So the amp with 2 x 40A fuses will need a cable from the distribution block that can carry at least 160A
The reason for having a much larger cable is so that the fuse blows before the cable acts as a heating element under load
these amps are built to a very high standard with exacting peramiters they are also known to put out more power than thier competitors
each amp is fully tested before dispatch to customers with a lifetime warranty
Don`t beleive the hype too much !!
Yes, they are good, and the sound quality of the old school stuff is second to none, but due to the quality issues nowadays, we have ditched the brand ourselves and have now joined that ever growing club of Genesis Ex-Main Dealers.