In rare cases those who have bought instages end up losing some sound quality.Best to ask about amop in question to those with experience if you were thinking say of geting a Brytston 4BST and then anotther.Not to say that this is one of those amps but monoblocs on the whole do sound ebtter but ecoonomizng by doing it in stages may not yield as good an outcome and one might be beter buying those amps in mono configuration if offered or larger stereo model.Rare but sometimes the case from what I have read here and Ayslum.
Chazz
Chazz