Hello Nickname,
The HW-B550 Soundbar has the ability to adjust a 7-Band EQ band, 150Hz, 300Hz, 600Hz, 1.2kHz, 2.5kHz, 5kHz, and 10kHz.
You can adjust the subwoofer, bass levels, treble and you can adjust a VIRTUAL CENTER LEVEL on this soundbar. It is a 2.1 channel so it does not have a dedicated channel for dialogue only, but the software can adjust the voices.
~Samsung Solutions