Originally Posted By: EFalardeau
The A1400 has both balanced and unbalanced circuits (two separate connectors to two separate daughter boards). The adapter is for RCA unbalanced to 1/4" unbalanced plugs not for balanced/unbalanced conversion.

If an amp takes both balanced and unbalanced, it'll have to have some circuitry to do conversion, unless it is just throwing away half of the balanced input. It'll at least have to combine the differential signals of the balanced to go into a single ended amp. Or create a mirror of the unbalanced to go into a differential amp input.

Pioneer PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs
-Chris