DC Coupled Input

The DC coupled input means that a microphone can be directly coupled to the input stage of the preamp without any coupling capacitors getting in the way between these two. Even the tiniest details in your sound (which sometimes get a little bit lost inside these caps) will travel to the actual preamp stages without being degraded. 

This works even when 48V phantom power is supplied to the microphone. A welcome side effect is that this topology makes a pretty rugged input stage which is less vulnerable to noises from hot plugging and phantom power switching artifacts than many other designs.