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

I wouldn't run the ribbon without a capacitor. It isn't just a matter of DC. It's all too easy to make a mistake, and then your ribbons are fried. As Roger says, you can compensate for the cap electronically if you wish. But I agree with him that since you want a cap, you might as well leave the existing crossover in place. It's easier, cheaper, and more practical.

I do run my system three-way, but that's because I've replaced the mids with Neo 8s, which are much more efficient than the ribbon and bass panels. I had them padded down for a while, but it was fairly ridiculous.

By the way, I second Roger's concern about the adhesive on the mids. Mine kept coming loose, and I had to press them back down. Don't know how he solved that problem. I agree too with his suggestion to replace them with foil if you can.

Finally, I don't think tubes are the best way to drive Maggies. They're just too power hungry. Maggies require several hundred watts to "sing." (Of course, it depends on how loud you like to listen -- I like to turn them up occasionally and listen at realistic levels, but most of us don't do that most of the time.) I had a Parasound A-21 on my bass panels for quite a while, and now I have a capable Class D amp and the Parasound is driving the tweeters -- overkill, I know, but I already have the Parasound, along with an AHB-2 on the mids -- not a large amp, but it's fine for the highly efficient Neo line.

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