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Re: toroids are perceived as good?

A common mode filter may reduce SOME of the noise coming into the transformer, but not all noise is common mode. As such, any noise that does get by that type of filter will be passed right through the toroid. That's due to the toriod having a wider bandwidth and the increased capacitive coupling between the primaries and secondaries. Other than that, toroids are FAR more sensitive to DC on the line, which can produce very audible side-effects such as hum and buzz. Sean
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