Looking into trying some new tubes in my Horn Monos (driving Chorus speakers). They came (used) with RSD EL34's but they will take almost anything from that family; EL34, KT90, KT88, KT77, KT66, 6550 or 6L6.
Anyone have any opinions? I listen to mostly lighter stuff; acoustic, jazz, classical, but some rock too. I'm after a more "tubey" sound; rich, warm, liquid. Bass isn't so important to me as detail in the mid and highs.