I have recently bought a pair of Adam A5X speakers, using it with Schiit Asgard 3 Amp, plugged into MOBO (AB350 Gaming 3) integrated sound card ( * ALC 1220 120dB SNR HD Audio with Smart Headphone Amp).
My friend advices me to buy an additional sound card (something from Asus Xonar) because my speakers do not offer their full potential without subwoofer and a good sound card
What would you advice?
I believe the vast majority of people here will recommend an external DAC over a sound card any day. A computer is an EMI generator and getting your audio out of it as quickly as possible is almost always better. One of Schiit’s DACs should pair well with the Asgard 3.