The contrast is absolutely fine, no problem with that - perfect contrast. It just feels like the screen could be maybe 25% brighter, like someone turned one of the bulbs off. Maybe I'm too used to the ultra bright modern screens.
I just fired up my XL next to it:

Very hard to capture this exactly as the screens don't play nice with camera white balance, but the XL is definitely brighter. The 4000 screen in reality is much less blue than it appears in the picture, but I think the picture captures the differences in brightness quite realistically.
It's not a big deal at all, I think to sum it up, I'd say it's a bit like a very high quality e-ink display. TBH, this might be quite nice on the eyes after a long session...I'm already getting used to it

I think it was just the initial shock of expecting a very bright screen like my 2500XLCD.
However if this is a case of a known impending problem, let me know
SP1200 wrote:well after switching from the 2XL it was for me a lil bit noisy - but of course nothing so horrible.
on this photos u can see the display.
http://www.ebay.de/itm/Akai-MPC-4000-in ... 489wt_1140
well i got the blue 4k but it defenitly has a good contrast and with the contrast knob
i can make a good adjust as i wish..
Don´t you have used mainly only the nuKAIs before? They have very difirent kind of dispalys..