“I use it with optical input and it is fantastic. The sound is quite neutral and can match with any sort of headphones and IEs. Through the USB input, the sound is less dynamic and microdetail is a bit inferior. The tube get really hot if you turn it on for days, but you can take it away if you don't need it. Included power cable didn't work at all. I got one with $3 at local...” --Headfire
This standalone headphone amplifier is for the absolute head-fi'ers. 6J1 tube output, compact size, with hand wound Oxygen Free Cooper transfomer. Made by Yaqin Audio in China, who has been Grant Fidelity supplier and great personal friends with us for 5 years. There are quite a strong following of Yaqin tube audio products online. Grant Fidelity re-brand this product to a Grant...