6V6GTA is a well liked and used tube---Hi Fi,"G"fiddle amps,oscillators in Gates AM transmitters-and have seen them as vert output tubes in TV's.For what those Motorolas were-their bass response was really good-The one a freind had you could play bass heavy music thru the console and the bass was well reproduced.-and even when played loud-didn't cause feedback thru the TT.Well engineered Hi Fi console.The 6V6 was used a lot in Magnavox Hi-Fi's,too.esp the Biamp in their Concert Grand tubed consoles.1 pair of 6V6 fed the tweeter horn-double pair fed a 15" woofer.Both the woofers and tweeters from those Magnavox Hi-fis are sought out by "G" fiddle amp folks.esp for Leslie speaker systems.