I have the Model 3 and it would be at least 5 years old. I plug it in to the HiFi as a tuner and it is quite good. Through the speaker they probably EQ it but it is very analog sounding. Place against a wall or in a corner and you might be amazed. I am still suprised at how it can fill a room.
The older models (original One, Stereo, and 3) were discrete as I recall, hopefully they have not gone to ic's as they did with the newer designs.
Good Luck,
Robert