The Topping D10B is a desktop USB D/A (digital to analogue) converter with ESS ES9038Q2M DAC chip, 384KHz PCM and DSD256 maximum resolution, Hi-Res Audio certification and symmetrical line outputs. The special feature of the device is that it is a digital interface that converts the signal coming in via USB to COAX and optical output.
The Topping PA3S is a Class-D desktop stereo amplifier with 2 x 80W output power, RCA and balanced Jack analogue audio inputs.