"One thing I need to add is the filter selector switch on the M-Stage DAC which gives you a choice between Sharp and Slow (Mute is not really a real filter). Sharp gives you shorter, more precise transients which works better for fast music (most noticeable on complex bass passages). Slow gives longer decays that works better for slow music. The filters are quite efficient and I switch around between the two quite often."
Quoting from a review, they look pretty cool IMO