What does "amp" mean ?

I am waiting you comparison. I hope that Hidizs Ap80 will be better, because I am going to buy it after Hiby R3)

I was listening only from 3.5 output. And I was disappointed. But I haven't got balanced headphones. So why does my shanling m1 sound with wider stage and have more air in sound?

Hi. I bought Hiby r3 and was disappointed its sound. It haves too much bass and narrow stage. In my opinion even Shanling m1 have more wide stage. Now I am going to sell R3 and buy Hidizs Ap80. What do you think? Is it a good idea or mistake?

Hi! Who did compare Hidizs AP80 and Hiby R3? I have Hiby R3 and think it doesn't have enough wide stage. My old Shanling m1 have wider stage. What can you tell me about AP80?