The best amplifier is no amplifier

At your risk. Sennheiser HD580 300Ohms headphones can be connected to line out through any good quality say 10KOhms to 300Ohms transformers. If signal is too high please protect your precious ears by using an attenuatos. (in fact on this experiment there is of cource the DAC output amplifier). But what if at the current output pins we connect the headphones directly through only 2 output transformers? This is what we were discussing recently with Panos.