COMBINED LEVEL AMPLIFIER: Tube amplifier with AUX dual input, rear panel for manual switching. ELECTRONIC TUBE: Vacuum tube amplifier is an sound amplifier that uses electronic tubes. 5.1 CHIP: Tube amplifier uses for QCC3031 5.1 chip, which is compatible with for aptxhd HD protocol for faster and more stable transmission, pushing HiFi to wireless.
eBay