Rebbi, to me that is ad copy hype. Mark me down as from Missouri, the show me state. I'd have to hear it to believe it! Not likely to happen. I' m all in on Charles' remarks. The DHT 300B is the "Cat's Meow." The EL34 can have a excellent midrange, but not to the extent of a DHT 300B. It's been written here and other places over and over.
I have owned both amp types amongst other types. I truly regret selling my Golden Tube 300B. When that company went out of business I was worried about ongoing support. Now, knowing what I know, with the advent of Shuguang Black Treasure 300B, I should have implemented Arthur Salvatore's (someone to listen too) mods to the Golden Tube 300B for true world class sound at that time. Now, he and his associates believe Charles' and Brownsfan Coincident 300B amp to be the finest sounding overall.