looking for a Bias procedure for an ARC Ref110

Hi Audiogon Members
Happy Christmas to everybody
I friend of mine who has bought a Ref110 needs a Bias procedure for his amp as long as the User manuel didn't come with his purchase. Could you please let me know the meaning of the 2 trims which are present per channel. I don't know if each one takes care of the bias of a pair or if one is use for the bias of a quad and the other one for the imput and driver tubes setting
Many thanks in advance for your help
king Regards
Call Leonard at ARC for information
Laurent - I do not have the Ref110 anymore, but from memory, each of those trims takes care of a respective tube pair. So you need to adjust 4 of them to get all 8 tubes right. The 4 input tubes have no bias adjust. You need a multimeter to adjust bias.
Many thanks for the answers that will help him a lot