Lush and Romantic Tube Amps

      The use of NOS British* tubes for input and driver/splitter positions, warmed things up considerably, for every customer that asked, back in the day.

       Amp's manufacturer didn't matter.

       Nor: whether octal or nine pin miniature tubes.

       The carbon composition resistors, used widely in older tube amps, gave them a warmer signature.    Even SS gear could be warmed up, by swapping those in for cleaner resistors.

                               *ie: Mullard, Genelex or Brimar

        Brent Jessee's site has a wealth of information, as regards the presentation of the valves available in the NOS market.

                                   http://audiotubes.com/

         You could warm up your existing system's presentation, by installing British valves in your LTA preamp, whatever your current amp.

@papafrgog ​​​& @vthokie83-

      While I totally agree with your assessments, regarding rolling amp valves; I'll bet the OP could save a passel of $$ (not to mention: possible sensitivity/efficiency matching headaches), were he to roll some warmer ones into his LTA preamp.

       Especially: if he's satisfied with the SPLs and performance of his existing amp and speaker combo, aside from that longing for a cozier presentation.

                                          Happy listening!

What I learned along the way is that NOS rectifier and driver tubes are vastly superior to current production versions.

                                                  Fact!