In conclusion, I would suggest that if you are satisfied with the sound quality of your PC output, you might give it a try for a while, and upgrade if you feel it necessary. If you often move/install your setup, the female jack 3.5 from your computer might eventually get loose and you might have connection issues. Jack 3.5 are not locked in the connector, XLR's are. Balanced outputs offer a better protection against induced interferences and allow for longer cables between the output and the monitors.
If you use an external sound card, it might have balanced outputs. The output of a PC will be unbalanced, so you should use a stereo jack 3.5 to two RCA's in this context. Your monitors have balanced (XLR or TRS/Jack) and unbalanced (RCA) inputs. The difference might not be easy to hear depending on what you're listening to and your ear training (besides the quality of the loudspeaker). The quality of a dedicated interface will probably be better than the default sound chipset of a consumer PC. A dedicated interface will output either consumer line level or professional line level, or both. PC output vs dedicated Audio Interface outputĪ PC will output consumer line level.
