astro mixamp

I have a Series X and I'm looking to get the TYGR 300R. I noticed they are low impedance at 32 Ohms. Would a MixAmp be useful to get also or would the Xbox controller be sufficient to power these? Currently I use this volume adjustment puck from Turtle Beach with the Turtle Beach Ear Force X1...

Hello, Just recently bought the Beyerdynamic MMX300 headset purely for gaming on the PS4. The issue I'm having is that I can't hear my own voice through the headset. I'm using a Y splitter(Sennheiser combo audio adaptor) to connect the headset's mic and headset connectors into the Astro MixAmp...