I recently added an Isotek power conditioner to my system. Everything improved with one quibble; the highest frequencies are a bit bright for my taste. I'd be grateful if someone could suggest a workaround that doesn't entail replacing any components. Perhaps cables?
Did you try the Isotek PC that came with the unit? I too have a Sigmas and have noticed no brightness at all. I use a Synchro with it, but a regular PC would be fine.
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