iBasso is a Chinese brand that is known for their digital audio players (DAPs). The iBasso DX150/DX200/DX220 allows the change of amp modules for different sound signatures. The next AMP module to be released will be the AMP9.
The iBasso AMP9 will be using the vacuum tube called “Nutube” which is developed by Korg. It features 3.5mm single ended output.