Multiple Audio Sources and Amp?

Hello all! It’s been quite a while since my last post on here.

I’ve recently upgraded to a pair of Beyerdynamic DT770 Pro headphones from the SteelSeries Arctis Pro + GameDAC.

The GameDAC is very handy though because it has PC audio, 3.5mm input and optical for Xbox One all coming out of one 3.5mm output.

However, the output is struggling a little for the 80ohm cans.

Can anyone recommend a mixer and/or amp that will support all the inputs and have a strong enough output for the headphones?

Mayflower Electronics Objective 2 amp/DAC is my suggestion