What digital filter are you using with your NS500?

What's a digital filter? Ferrite beads on the interconnects or power conditioning? Don't use a cheap Monster for the latter....

Thanks Ivanj I already got my player and found the digital filter in the set up menu. The option only affects cd playback. The two settings are sharp and slow.

I just compared the slow and sharp filters on my NS500V and the sharp filter is the one to use. Using the slow filter results in a smoothed, muddy sound, devoid of life and air.
With the sharp filter the life and air come back. I am using the NS500V as my main CD/SACD source, I prefer the sound to my older Denon DCD-1700 CD player.