Dweller, ARC charges four times as much for their 6550 tubes . The same brand of 8 matched 6550's can be had for about $240 w/o even shopping for best price.
2000 hours tube life divided by 9-hours of listening per week = 222 weeks, divided by 52 weeks in a year = more than 4 years of tube life. $240 divided by 4.25 years is less than $60 per year in tube cost. And this only applies to the power tubes as the small tubes and preamp tubes last much longer.
Now if you leave the tube amp on for long extended periods without ever turning it off (spewing out background music all day long, every day), that might be costly. That's why I have a cheap SS receiver to satisfy my need for constant background noise. ;-)
2000 hours tube life divided by 9-hours of listening per week = 222 weeks, divided by 52 weeks in a year = more than 4 years of tube life. $240 divided by 4.25 years is less than $60 per year in tube cost. And this only applies to the power tubes as the small tubes and preamp tubes last much longer.
Now if you leave the tube amp on for long extended periods without ever turning it off (spewing out background music all day long, every day), that might be costly. That's why I have a cheap SS receiver to satisfy my need for constant background noise. ;-)