How do these old Onkyo A-905TX amps sound?

The rating on the back of these JDM amps is “100V, 45W”. Do they sound alright, will they be able to power my Fluance SX6’s to decent volumes? Do they need some sort of power adapter for the 100v vs 120v ? Someone on Reddit said they sound good but others said they are nothing special. For reference, I am on a tight budget and currently I’m using a Yamaha HTR 5840 to power my speakers. Class A/B amps is what I want to use (for my own peculiar reasons).