This is an exceptional amplifier and I have had very good luck using it with a number of tube preamps and a pair of Spendor SP100s. I have sold YBA gear for a number of years and find the build quality and customer support to be at the top of the high end audio industry. The previous post on YBA products working best with YBA products (and this should certainly be the case with most manufacturers) is true though I have not found this particularly more prevalent with YBA. I use a pair of YBA2HCDT monos in my store and will always think of YBA first when recommending solid state electronics to my customers.
