I didn't know anything of these tubes, so I briefed myself. I say if the solid state circuitry transforms the music into kilobits per second (with minute empty spaces in between the bits), then avoid it if you can. If the tubes are the only answer for a decent amplifier, and you can find them, and afford them, then go that way.

Some people feel the tubes are not actually HiFi but instead add something to the music that wasn't there at all. I might disagree with that. I'll have to see. After all, the tube is an amplifier, and it is adding to the sound by amplifying it. So is it changing the sound? Yes. But is that a change in quality or quantity? I haven't heard it (or have I), so I can't yet say.

Either way it matters not. If the alternative to the tube is a transistor that chops the music up into packets of data, that's not really a good alternative to tubes.

It's funny. Even electronic music sounds better when played over analog. I can remember listing to Depeche Mode on a cassette tape. I am assuming that was analog. Boy did that sound great. I heard the same song a million times hence, and never so good.

I wonder why they call it lossless. It might have something to do with a tremendously fast bitrate that echos the frequency of sound itself. Even so, it's not like we haven't heard lossless. We all have. We heard it before compact discs went out of style. All of the CDs were recorded in lossless. They weren't very impressive in comparison to analog.