I posted this elsewhere, but it might some people old Torii's kicking around.

The Tung Sol 7581's are sounding fantastic in my Torii MK3. Just perfect from top to bottom.  Only 6 hours on them and they are very impressive. The only thing I would a little more of is some wide-range bloom/sweetness, but that might come with some more hours?

BTW, I am very impressed with this seller on Ebay. Husband and wife business. Definitely will be supporting them more. Guitar amp people.

They have very strict standards when it comes to matching. 5% for plate current AND 10% for transconductance.

https://www.ebay.ca/itm/New-4x-Tung-Sol-7581A-Matched-Quad-Quartet-Four-Tubes-Fr....