M4 : Great clarity and sound for this price

I'm using this in my home studio setup, connecting two pairs of monitors, headphones and some mics and guitar.

The build quality is great, metal chasis and pots, beautiful LCD display with meters, and rubber bottom pads so it doesn't slip around.

The headphone amp drives my 250 ohm DT990 without a problem. I keep it at about 60-65% while mixing and at about 50% for mastered material and it is loud enough for me, with a lot more gain if you need it.

Sound is crystal clear, which is expected as it has professional converters.

The only thing that bugs me is that there is no volume control for output 3/4, at least no practical and fast way to do it. So switching to my secondary monitors to check the sound is a bit of a hassle.

Pros:

Sturdy build, clean converters, great LCD, two pairs of outputs, good headphone amp.

Cons:

No volume control for output 3/4