Kara? Tubes, solid state, no matter. I know that particular model very, very well. They have a SINAD of about 10 db, and a signal-to-noise ratio of about of 5 dB.But what about the tubes ???
In other words, they let you know that someone pressed the doorbell, long after UPS/Amazon man has left. They let you know when it's time to eat, go out, time to play. They have no mute button.
They are very smart, a full 24-bit depth. They have Class A topology, very, very warm. The packaging is top-notch, However, a hair remover roller is essential and periodic maintenance is essential with these units.