I feel that tubes are the sonically superior technology for audio. Their generally simpler circuits and smaller number of components provide a purer signal path and consequently more truthful signal handling. Musically the second harmonic produiced by the tubes is an octave above the fundamental and is almost inaudible, yet it adds body to the sound, making it fuller.
SE 2 x EL84, 1 x ECC81, 2 x AZ1
SE 2 x EL84, 1 x ECC81, 2 x EZ80
SE 2 x EL84, 1 x ECC81, 2 x EZ80