I recommend you to try your speaker with Rogue Cronus Magmum II.
It is made in USA providing nice after service.
https://www.audiogon.com/listings/lis97bcd-rogue-audio-cronus-magnum-2-silver-100-x-2-tube?refsource...
It is a pretty good amplifier with stock tube but with tube rolling it can be excellent one.
You can replace stock A12Au7 with Amperex and A12AX7 with Telefuken.
5 good Nos tubes cost around 300$ at Ebay.
Be sure to buy from the source who offer unconditional return.
It is made in USA providing nice after service.
https://www.audiogon.com/listings/lis97bcd-rogue-audio-cronus-magnum-2-silver-100-x-2-tube?refsource...
It is a pretty good amplifier with stock tube but with tube rolling it can be excellent one.
You can replace stock A12Au7 with Amperex and A12AX7 with Telefuken.
5 good Nos tubes cost around 300$ at Ebay.
Be sure to buy from the source who offer unconditional return.