In response to the post by @ghdprentice, the Pass XA 25 is a great sounding and very capable 25 wpc ss amp, and I understand your Cambridge is no slouch. Tubes are not for everyone. There are pros and cons living with each. It boils down to you and the sound characteristics you are looking/listening for. It is all subjective, and listening/reading reviews is not the answer, ime. Honestly, folks who love tubes, ime, like a bit of warmth, color and politeness in their recorded music reproduction, and there is nothing at all wrong with that. Tubes tend to be very holographic, when matched well to the rest of the system (in this case, the speakers). I prefer sharper attacks/transients, finer detailing, along with strong, rhythmic and controlled bass, and of course, an extremely quiet noise background. At 71, I have been through lots of gear, and I simply know what I like, as do many others, although, many still play in the merry go round, of changing gear (part of the hobby). This is the key...determine what you like, by listening, with your ears/brain. My best, MrD.