Yamaha as-3000 with Denon dL-103R low output MC cartridges

The input sensitivity on the Yamaha is a low .1mv and the output of the Denon is .25 mv. It will work fine!!

On my system, I use a ZU Audio modified DL103 and load it at 400 ohms. 

Thanks all of you. Very useful information.
@stereo5 what amp do you use? Integrated or pre/power amp? Thanks

I use a McIntosh C2500 preamp. The MC section has 6 impedance settings that I can change on the fly via the remote.  I also use it with a McIntosh MC302 300wpc amp. 

@dekay you advised Yamaha's MC section is set @ a "fixed" 50 ohms (100 ohms is the recommended load for the Denon). 
im sorry I’m totally noob here so what issue will happens at fixed 50 ohms against sl-103r?
In other words, you means dL-103r on as-3000 integrated is a no no?
Or you means 50 ohms is still can play with dl-103r, but 50 ohms cannot push dL-103r to its fully potential?
thanks on advanced.