i recommend
www.audiotubes.com
brent jesse. the guy is a tube freak and has vast knowledge on every kind of tubes. he often has in stock very scarce uber expensive tubes. prices are high but the guy is unquestionably a reference in tubes. i have bought many tubes there and was always extremely happy. if you want the best sound for the lyr it is going to cost you a lot. i have orange globes and they d'ont sound as good as my 1956 pinched waist mullards. not by a long shot.it's not even funny! with the pinched waist mullards, my lyr sound as good or better than my 3 channel b22 to my ears. absolutely incredible sounding tubes. if you want as good sounding as the pinched waist mullards for half the price, but still expensive, i recommend 7308 mazda france large halo getter gold pins from the 60's. the pinched waist mullards cost 600 bucks a pair and the mazda tubes 325 to 350 a pair. you want the best sound, it is going to cost you. brent is currently on a tube hunting trip. he will come back on the 22th of july. c'ant wait to see if he finds more pinched waist tubes. in any case, get rid of the stock tubes as fast as you can. especially the ge tubes. they are horrid sounding tubes. and d'ont waist your time with new production 6922 tubes. none of these tubes can hold a candle to the best nos tubes. not even the e.a.t. e88cc tubes.
the real question is how much are you ready to spend on a single pair of tubes for the lyr? anyway you should email brent and ask him what you need. he is a sweetheart and will answer your every questions. if you want the best sound at affordable prices, the orange globes are the way to go. no doubt. price performance ratio is absurdly high. and as a bonus you can have many pairs.pinched waist tubes are very scarce and in fact my pinched waist tubes exibit just a tiny bit of microphonics, and one of them as a small defect. the microphonics disappear when i change them of socket on the lyr. they are by far the easiest tubes ever to remove from the lyr sockets. they are an absolute delight with the sennheiser hd 800. just plain incredible. the lyr is an inexpensive amplifier that can scale to very high level of sound quality.