Agree on the VAndy info all are giving. Glad you went with the 2's. You'll love them I'm sure. I'm running the Ayre AX5 Twenty with my Treo's and am trying to sell the Treo's for the Quatro's. I will just install the filter on the inputs and manually plug in the balance out from my Rhea or the Balanced output from my Empirical OSDE/SE. Not the best solution, but it works easily and I'm always up to put on a record so it's easy.