I'm searching for a reliable impedance graph for the SD1.1 to import into SPL Trace. I have only found 2. The manufacturer's graph, which I'm leary about being trustworthy. and Zaph's, of which I recall someone stated shouldn't be used because the resolution is too course. Also Zaph's impedance graph for the SD1.1 seems to average about 1 ohm lower across the spectrum compared with the manufacturer's graph. Are there any other graphs available, or can someone link me to a .zma file?