After tube rolling with Mullard, JJ Tesla, Sovtek and the EH el34's. I found that the Electro Harmonix Big bottle 6CA7's were over all killer in my Jolida 302B amp. Excellent highs and awsome bass response very clean.
The preamp tubes I am using the EH gold pins 12AX7/12AT7.
The preamp tubes I am using the EH gold pins 12AX7/12AT7.