9. What other FiiO products can I use with the X5 3rd gen?

A: 

1. Connect via Line Out as amp: All FiiO amplifers such as A3, A5; and DAC/amp with Line In such as Q1, E17K, etc

2. Connect via Coax Out as DAC: DAC/amp with Coax In, such as E17K

3. Docking stations: K5, DK1

4. Bluetooth Remote controller: RM1