And yes..... After a year of professional operation in the studio, it's time for evaluation.
Numark M6 -Usb.
Very good sound quality, excellent sound card. From the knobs, it takes a little time for the machine to warm up and then everything softens... Bass Mid Treble Gain, everything is nice! The only downside of this console is the build quality... Okay. To gain something, you will lose something. LAW!
We always look at the (INTERNAL) circuit board and not the beauty of a machine/product in mind!

The mixer has been used for two years, 2-3 times a week, for about two hours each time, in a perfect home environment, without smoke, etc., for amateur use.
In the headphones, the final output is always a bit low, not just the selected cues.
The knobs are logarithmic!! Unacceptable for a DJ mixer!
Almost all the faders have a problem near the max: the sound cuts out from the channels, but if you move it slightly to the right or left, it comes back, etc.
Maybe it's normal, I don't know, but today I would buy the Behringer 750 for about the same price.

Wonderful entry-level mixer that produces great sound when combined with self-powered monitors and a turntable, as well as with CDJs and digital audio. It's worth its money, although it has inputs/outputs for large amplifiers, it's not suitable for a club. If you have a club, prefer something more expensive. It may be more suitable for a cafe/bar where the volumes are lower.