I have 50 amp maxi fuse with 6ga cables rigged up to check the 700 watt 350watt should be enough for those but like I said i don’t think I can test the 1000watt fat boy
I don’t think it’s enough for 700 watts, to be honest, if that amp will actually do that much.
It’s pretty typical to see an amp draw of 10 amps per 100 watts, in an amp with no internal driver.
I don’t know anything about the MS700, but if the amp produces rated power, I’d expect more draw than 50 amps...probably 75-80.
EDIT: I went and looked up the 700 to see what’s supposed to be under the hood: 5 X SD1446.
In that case, it’s not going to draw 75-80 amps. The other news, it’s not going to produce 700 watts either.