Bought a pulse headset without the usb dongle. I am loosing too much audio quality?

Hello r/ps4

After my first paycheck I bought a used Elite Pulse Headset for ps4. The problem is that it came without the usb dongle. I just read that without that I can't get 7.1 sound as the DS4 only outputs stereo. Can I buy a generic dongle (I live in Chile so that is the bet I can get), or connect the headset trough usb and get sorroun sound? And more importantly, I am loosing too much quality using this connected to the 3.5 jack on the DS4?

Thanks in advance