with 2 G55 you can do:
4x300w + 2x150w 6.1 config
3x300w + 4x150w 7.1 config
2x300w + 6x150w 8.1 config
or 10x150w

lots of flexibility from the amp, the 558 had the same but with more power. I would like to know the difference between the 2 in sound thought.

FB