That brings another question: I wonder what would be the "upgrade" in taking a signal already converted (from digital to analog) using a multi thousands $ DAC (from Linn) that goes into another multiT$ Linn preamp to make it reconverted back from a $950 Axiom audio that does what an equalizer would do (if I understood correctly what the DSP is doing at the end)? Correct me if I am wrong but would you not say that the first graph which shows the reponse of the speakers depends on the quality of the signal going out of the preamp (and that is why you are correcting the signal). So DSP box will improve the sound if you have a lower quality source (DAC or other) and a lower quality pream than what the Axiom DSP is. I know money is not everything (your speakers are the proof of that) but still each time I tried to hook less expensive electronics on my Linn system that are supposed to improved the sound, it did the reverse (ie hugely downgrading the sound quality).