tube roll the - pre amp or the power amp?


anyone care to share their experiences with bat vk55/vk3xi

Wld tube rolling on the pre or power benefit / change the sonic natture more?

Rgds
art80342
call Viktor...at bAT
Roll the constant current source tubes in the VK-3iX preamp will give you the most change in the preamp. No experience with your power amp though.