Stitch wrote :
"...some help from a non-republican :-)
1. the fuses you need 2- or 4 see below- and 2 spare:2A-250V /(313) slow-blow
2. Internally there are another 2 fuses:1,25A fast-act
3. Remove the bottom plate and check/replace those fuses first..."
I'm not sure what Stitch means here... Maybe he's suggesting that you verify the internal fuses, which you may want to do, but this has nothing to do with mains voltage selection.
Vladimir Lamm wrote
(scanned from Lamm ML2 "Operating Manual", so you'll have to imagine that its in blue) :
Yes, "externally adjusted"
The value of fuse required is indicated by the table printed on the rear panel of each amp, as shown in the above image.
This is the only part of the ML2 that will need to be opened when selecting an alternate mains voltage.
How to short-circuit evolution: Enshrine mediocrity.