I would like to be able to use both my speaker and headphones plugged into my PC with my DDJ FLX4 also plugged into my PC

Hello all, I just got a brand new DDJ FLX4 and am trying to use it with rekorbox on my pc. I have an external sound bar plugged in through aux cord and headphones plugged in through usb. I want to be able to use my soundbar for the main speakers and use my headphones for cue. I would use the headphones with the headphone jack, but the sound quality is horrible plugging it into the board. Is there any equiptment or setting I can get or change to be able to do this? I have messed with every output setting in the system preferences of my PC and with the audio settings in rekordbox. If anyone has an asnwer for this I would greatly appreciate it.