Chinese companies like Topping / SMSL / Sabaj etc. make excellent DACs, streamers, amps, power supplies, etc. They measure and sound excellent. These are building blocks for stereo integrated amps, stereo / surround sound receivers. So why would these companies not put together their DACs/Amps in one big box to build a decent 100W per channel integrated amp with HDMI or even a full 9.2 channel AVR with same wattage? A Fosi ZA3 monoblock capable amp sells for $130 retail with all the packaging and power supply. Wondering if they can come up with a sub $1000 AVR made from their own parts.