For awhile I had both a Cronus and an AES/Cary AE-25 Superamp with DJH AE-2 preamp, still have the AE-25.
My speakers are Devore 8's and the sound with either amp and EL-34's is exceptional The Devores are designed with tubes in mind and have such great range and dynamics for their size that they don't need the extra punch of KT-88's or 6550's, though those sound great, as well.
The El-34 types I've used are Teslas (pre-JJ), both black and brown base, RFT/Siemens and the Gold Lion KT-77 reissues. They all sound great, I'm not sure I could pick a favorite.
My speakers are Devore 8's and the sound with either amp and EL-34's is exceptional The Devores are designed with tubes in mind and have such great range and dynamics for their size that they don't need the extra punch of KT-88's or 6550's, though those sound great, as well.
The El-34 types I've used are Teslas (pre-JJ), both black and brown base, RFT/Siemens and the Gold Lion KT-77 reissues. They all sound great, I'm not sure I could pick a favorite.