Lehner 1950/6 vs 1950/6 high amp

[Gustav]

Ah,so there's 2 sets of 3 bridges? that's what the lines in the end cap and the red dots on the solder are? so if you bridge the gaps and unbridge the other 3,that's how you change configuration? It doesn't seem like a very easy job 'switching' between the two.I never understood how you do it,as you can probably tell,.lol.