Kubla,
To determine which panels you have you need to look at the wires coming off the panels. If they are the very early panels, the stranded wire is relatively coarse and silver in color. If you have the OFC panels the wire will be fine copper stranded. The 5-wire panels use the same type of OFC stranded copper wire, but obviously there are 5 wires per panel instead of 3.
Lou, I never said that the model 3s were Spectras, so perhaps you are confused. BTW, The Spectra panels are the same as the late 5-wire non-spectra panels except that they have high-voltage resistors wired in to limit the high frequency reproduction to a more narrow section of the panel. In theory this seems like a plausible approach but I'm not sure how great it worked in actual practice. Some say the late non-Spectra panels are more transparent because the signal isn't being routed through resistors. So it would seem there is a trade off between transparency and dispersion at play.
To determine which panels you have you need to look at the wires coming off the panels. If they are the very early panels, the stranded wire is relatively coarse and silver in color. If you have the OFC panels the wire will be fine copper stranded. The 5-wire panels use the same type of OFC stranded copper wire, but obviously there are 5 wires per panel instead of 3.
Lou, I never said that the model 3s were Spectras, so perhaps you are confused. BTW, The Spectra panels are the same as the late 5-wire non-spectra panels except that they have high-voltage resistors wired in to limit the high frequency reproduction to a more narrow section of the panel. In theory this seems like a plausible approach but I'm not sure how great it worked in actual practice. Some say the late non-Spectra panels are more transparent because the signal isn't being routed through resistors. So it would seem there is a trade off between transparency and dispersion at play.