When I look around then this amp, taking your statement with the rectifier, needs symetrical AC supply as an input.
For a mono amp the transformer would be 120W / 2x25V per amp. You need more because of the loss the amp includes
Depending on your setup and build maybe several transformers would be better. Or you add all up to 960W trafo.
So since the LXC route is promoted here take a look into these Helper Scripts they make the use of LXC very easy.
That said you could still adjust parameters afterwards and when you feel comfortable with.