Quote Originally Posted by Billiam62 View Post
Didn't you roll the tubes for your Qinpu amp? I bought JAN 5670's for mine and it made a considerable improvement to the sound. The audio not only became smoother, but the bass depth improved and the midrange and high end became more 3 dimensional and the high end more open and airy. There are other more expensive tubes that people claim will improve the sound of the Q amps even more than the 5670's. May spring for some of them at a later time when I am not pinching pennies.
The only tubes I have rolled recently are the 6922/7DJ8 tubes on the Grant Fidelity DAC-11. On Friday I did receive my order of replacement tubes for the 6N3's but have yet to roll them into the Q. I got a pair of Bendix and a pair of Tung-Sol and both are the 2C51's which are equivalents to the 6N3's. I will wait a couple of weeks before rolling the 2C51's as I want more break-in on the TMV4's.

Good to know the Jan tubes are an improvement over the stock tubes.