not rolling but upgraded from stock, oh baby what a quest.
stock tubes from whom, OEM tubes or you bought used? I imagine OEM's put what they believe is best, then people replace/roll. The difference to the OEM of 'stock' tube cost is insignificant to the cost of the amp.
You will get into the issue of Bias, I started a thread about that 1-1/2 yrs ago, after ton's of advice, then Covid, all kinda other new stuff all over the house, did nothing about bias.
https://forum.audiogon.com/discussions/tube-bias-socket-to-me?highlight=bias%2Bsocket%2Bto%2Bme
Since 1973 I have messed with these power tubes: EL37's; EL34's, 6L6; 7581, 5881; 6550, KT88. weak, shorts, got hold of some money, .... a variety of amps and reasons.
Most recent, my Cayin A88T came with used 6550's. I like having spares, got some b'day $, bought some new KT88's. I loved the 6550's, I love the KT88's more. Convinced myself with my own expectation bias?
Source: Brent Jesse, http://www.audiotubes.com/
stock tubes from whom, OEM tubes or you bought used? I imagine OEM's put what they believe is best, then people replace/roll. The difference to the OEM of 'stock' tube cost is insignificant to the cost of the amp.
You will get into the issue of Bias, I started a thread about that 1-1/2 yrs ago, after ton's of advice, then Covid, all kinda other new stuff all over the house, did nothing about bias.
https://forum.audiogon.com/discussions/tube-bias-socket-to-me?highlight=bias%2Bsocket%2Bto%2Bme
Since 1973 I have messed with these power tubes: EL37's; EL34's, 6L6; 7581, 5881; 6550, KT88. weak, shorts, got hold of some money, .... a variety of amps and reasons.
Most recent, my Cayin A88T came with used 6550's. I like having spares, got some b'day $, bought some new KT88's. I loved the 6550's, I love the KT88's more. Convinced myself with my own expectation bias?
Source: Brent Jesse, http://www.audiotubes.com/