Ok here is my initial thought, WOW! With my EH EL84's my amp sounds nice, good bass, slightly rolled off highs, very good midrange with nice imaging. Not so great is the sense of space, the music doesn't go beyond my speakers. I put in the Siemens EL84L's and now the sound is more transparent, airy , better highs and a soundstage that now goes beyond my speakers. All this out the box. This doesn't matter but I noticed these tubes burn brighter. These tubes make me miss the Lightstar less. More to come next week after these babies have got some break in time.
CARVER LIGHTSTAR REFERENCE+SUNFIRE CLASSIC TUBE PREAMPLIFIER+JBL XPL200+MUSIC HALL MMF-9.1+GRADO REFERENCE MASTER 1+CARVER SD/A 390t=WOW!!!!!!