Plug them in so you can enjoy your music to the maximum.
Invest in spares NOW, so when these die you wont' be frustrated. Later on, should you decide you don't want them, say two to five years from now, they will be worth more than you paid. What else in audio can you purchase and value goes up instead of down, even if you don't want them :^)
I currently have about 200 NOS tubes that I'm not using. If I need any popular type, good quality ones are on hand. Some of these were bought in 1998 for (literally) $6.00 each and are now worth $100.00 +.
Invest in spares NOW, so when these die you wont' be frustrated. Later on, should you decide you don't want them, say two to five years from now, they will be worth more than you paid. What else in audio can you purchase and value goes up instead of down, even if you don't want them :^)
I currently have about 200 NOS tubes that I'm not using. If I need any popular type, good quality ones are on hand. Some of these were bought in 1998 for (literally) $6.00 each and are now worth $100.00 +.