Are you driving the 1080 directly from A5(I doubt it) if not what is the preamp? From what I can tell, 1080 amp is pretty efficient with 1.5v 32kOhm input.
A5 specs:
2.15VRMS o-put 47 Ohms impedance
Something is wrong here, in your set up. Please specify the preamp.
A5 specs:
2.15VRMS o-put 47 Ohms impedance
Something is wrong here, in your set up. Please specify the preamp.