HI, had same preamp years ago,VTL5.5 and the only tubes that work best was siemens 12ax7 don't even try telefunken they sound terrible in that preamp, another suggestion is that,
VTL 5.5 is not a good match with SS, amps reason why sold my
regards: ,
VTL 5.5 is not a good match with SS, amps reason why sold my
regards: ,