Audiophilepure

https://headfonics.com/2020/01/xduoo-ta-10-review/

“The entire low end of this TA-10 is firm, dense and plentiful. The stock tube is not known for excellent low-end depth, but this amp has it anyway, which is a testament to internal circuitry pairing. It isn’t always about just the tube, or just the DAC by itself, especially not in a hybrid design.

If you enjoy meaty bass, this is a great option and I would recommend you kick the stock tube out and hunt for a very warm replacement. You won’t regret it. Fun and musical headphones really sing with this model, bassy headphones and high levels of warmth are accentuated by the natural low-end experience the TA-10 offers.”