@arsh. My experience is that the nos tubes allow you to fine tune to your systems and tastes. I feel like a kid in a candy store because I wanted this piece bad and one came up. I always wanted to try this however sometimes pieces don't meet your expectations. This one has with the tubes change to the Siemens. I will always tube roll from now on. It's like being able to change your product to your system and tastes by changing the tubes. I'm using high fidelity ultimate interconnects and these tubes ended up being a prefect match. I've listen to music about 10 hours in the last day and a half since I put them in. Without the tubes the player was just good with them they are special. I wish I would have gotten the seimens CCA. They are more expensive though.
