I just bought a Topping dx3 pro plus to pair with my s350db speakers. When I hook with RCA cables, there will always be a hissing sound, and the sound coming from the speaker will be bent or unlistenable.
With my previous DAC (Soundblaster x3) I insert the optical cables and it works just fine, but not with my Dx3 Pro Plus. I tried 3.5 jack with my iem and it works normally, sounds crisp and detailed. Is it because of my speakers? I already tried installing the drivers and firmware for my PC but the sound is still terrible on RCA input, no sound on optical.
With my previous DAC (Soundblaster x3) I insert the optical cables and it works just fine, but not with my Dx3 Pro Plus. I tried 3.5 jack with my iem and it works normally, sounds crisp and detailed. Is it because of my speakers? I already tried installing the drivers and firmware for my PC but the sound is still terrible on RCA input, no sound on optical.