In my Primaluna Dialogue Premium the EL34 Mullard reissue are brighter and more forward than the stock PL power tubes but lacking in bass. The Mullard CV 4003 brought back some bass but finding the CV 4003 definitely darken up the sound. Maybe I should try some RCA Cleartops. Has anyone compared them to the Amperex (Holland) 7316? The 7316 has some energy but very detailed and expensive :(
JB this is becoming an interesting experiment ($$$) and I am enjoying reading about your findings.