Hi All, what would be a good amp for the new Oppo headphones? Source would be analogue (digital dac'ed). Would the Epiphany O2 be underplaying them?   Thanks

Newbie here, first post, hi all!   The new Oppo headphone amp has toroidal transformer(s) and linear regulator(s). That suggests to me that it isn't multi voltage but I'm no expert. The rear case says 110-120v  230-240v, that suggests maybe. Would a US model work in the UK without transformer...