Audio quality is good but i have some cons:
1. my unit had the MAIN LEVEL knob defective, it was distortioning the sound when adjusting the level, but a replacement is on it's way.
2. all the level knobs are STEPPED KNOBS, so you can adjust the level in steps. i don't know why they engineered it like that, because it's pretty hard to adjust your levels. one step could be too low, and the next step could be clipping, and you don't have any "middle option"
3. the knobs are wiggly.
As for the build quality the unit is very heavy and solid. It has 4 scews on the bottom, it will scratch your table/other equipment that's under it.