If anyone ever wondered how Andromeda's reaction to several output impedances looks/sounds like: The yellow line shows a 0 ohm source, so there's no sound chance, hence it's a straight line. The lines below show 2, 4, 8, 16, 32 and 64 ohm outputs. I think it's not a secret, that Andromeda will sound brighter on high z sources, but nevertheless nice to see different outputs in comparison. If you like the "original" uncolored sound I'd recommend sources below 0.5 ohm. 0.5 ohm is the exact value the variation of the frequency response will be as high as 1dB compared to a 0 Ohm output.