"The Brooklyn represents Mytek’s next step in the evolution of its “entry-level” yet full-featured DACs. The $1995 Brooklyn is not only a DAC, but also a preamplifier for both analog and digital sources, a headphone amplifier that supports single-ended and balanced cans, and a phono preamplifier for both moving-coil and moving-magnet cartridges. The Brooklyn also comes with its own dedicated control app that allows you to operate all the Brooklyn’s functions from your computer as well as perform software updates." -- Steven Stone, Sep 06th, 2016 The Absolute Sound.
The Brooklyn is a preamp as well as a DAC. Unless you want tubes or a different SS signature I don’t see the need for adding another preamp.