onyx

So just about 2 months ago I managed to snag an Onyx Producer 2-2 for half price, brand new, because the audio store near me was letting go of old stock. I have it using a Mackie 89-D microphone and so far it's doing well. Should I get the Topping E2X2 or should I just keep my current interface...

I've some questions about the Onyx Artist 1x2 2X2 USB Audio Interface... Can anyone help? Is the Onyx Artist 1x2 2X2 USB Audio Interface's main "Monitor knob" done volume control digitally (before the DAC attenuation) OR analogically (after the DAC attenuation) on the 1/4" Line Outputs...