the solid state darTZeel NHB-108 stereo amplifier replaced Tenor Audio OTL tube amps in my system 19 years ago now. and over 19 years with the darTZeel brand i’m still a tube lover using solid state.
you can find used darTZeel 108 stereo amps at reasonable prices from time to time. low noise, sparkling mid range with a touch of tube ’breath of life’ magic. zero solid state edge or blandness, wonderful smooth high frequencies.
Swiss quality fit and finish, and built like a tank.