1. For better sound quality and sufficient volume, please connect HEADSET to AUX port and connect amplifier (Active Speakers) to RCA port.
2. AUX ports do NOT support professional/high impedance headphones/speakers such as Audio-Technica, Ultrasone, Sennheiser or others with impedance over 32Ω.
3. This DAC is a digital to analog converter only, can't be an audio amplifier. If you are using the suggested connection and the impedance of your headset/speaker is under 32Ω, we suggest you to connect a amplifier to produce sufficient volume.
Other questions, please kindly email to firstname.lastname@example.org for further assistance.