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RE: Tri-amping T IV-A's with tubes?

Yes, the mids/tweeters do need a fair bit of power and the impedance is rather low. I have seen them driven by Krells on the basses and Audio Research on the rest, not sure what model, maybe D-90. If the tweeters are padded down (with a series resistor) their impedance will not be a problem for most tube amps. Padding down will be a must if you go for foil on the mids (it lowers the output on them).

My mids are still not fixed... I will need a replacement of the Mylar as well.

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