Direct repacement of KT88 for KT120 on Ayon


Can just replace the KT88's on my Ayon Orthos II for KT120's or should they be modified to receive the Kt120's?
Thank you.
10ht
Hi 10Ht
How do you like them, i am thinking of buying orthos ii
to power my hansen Emperor, is this amp never run out of power?
chris