I had a chance to listen to this headphone amplifier in my system, and I had to buy it. It bested all the other head amps I had tried by far. The Exemplar has an incredible 3D presentation of the soundstage. I just love the feeling of wanting to reach out and touch the instruments, and that is what this headphone amplifier does. Even though the amplifier says it uses 6H6Ps tubes, I found tube rolling has a nice impact on the sound, so I was able to dial in the music to my liking. I tend to like a lot of detail, so I ended up using Telefunken...