What’s the best tube for a Sonic Frontiers SFL-1 preamp

Hello all,
I just acquired a SF SFL-1 preamp. What’s the sweetest tube any of you SF fans have used in this preamp?
Thanks

skipper32002-13-2021 10:35pm

petg60 Details Discussions Posts This discussion Message User 1,486 posts 02-13-2021 at 11:45pm Copy Comment URL Report Comment Edit Delete I am not familiar with SFL1 but a Valvo 6201 or 12at7wa will suit it nicely. Going sweeter a Mullard CV4024. G