Mk lll tubes, what are they for ?

[Boogie Woogie Man]

V1 and V2 I believe are for R1 and R2 channels, what are the other three for ?

 

[Buddy]

http://www.mesaboogie.com/manuals/Mark%20III.pdf


As it is written .

 

[Boogie Woogie Man]

http://www.mesaboogie.com/manuals/Mark%20III.pdf

As it is written .

Thankyou Buddy, much appreciated.