vox amp..

[Acdc]

hi ppl,
i just gotten the vox ad30vt and have some questions...i understand that it is a hybrid amp with a tube inside......how often do i need to change the tube?how do i know when i should change it?can i change it myself?and how much is the tube?...i am an amp noob...so i will appreciate any help..thanks

 

[ciel]

preamp tubes for the hybrids usually last damn long a few years. so u prolly wont need to worry for a while

 

[Acdc]

how do i know when is the time to change?

 

[edder]

when your amp starts to sound funny. thats when. probably never.