One of my favorite tube amps for horn speakers is the Welborne Moondogs 2A3 SET. I saw their is one for sale on the Klipsch website for a great deal especially since it has the ultimate upgrades. These don't come up for sale very often. https://community.klipsch.com/index.php?/topic/151402-for-sale-welborne-moondogs-2a3-w-ultimate-upgrade/
