guido,
i use both usb (Mac mini via audivarna) and coax (cec tl3n transport) straight into 45 tube set amp using high fidelity ct-1 interconnects then into teresonic lowther speakers. it's the best sound I've ever had, the rebook through the aeris is better than the hi-res i've heard on other dac's. as some reviewers have pointed out, the volume control can be tricky going straight into amp, it happens to match my setup though.
i use both usb (Mac mini via audivarna) and coax (cec tl3n transport) straight into 45 tube set amp using high fidelity ct-1 interconnects then into teresonic lowther speakers. it's the best sound I've ever had, the rebook through the aeris is better than the hi-res i've heard on other dac's. as some reviewers have pointed out, the volume control can be tricky going straight into amp, it happens to match my setup though.