you're welcome! thank you. come test the drive!
спасибо. но звучит саб еще лучше. приходи.

• marble world

I think I wasn't all too clear in my questioning.
I've build the 3Pi about 6 months ago and I'm still very happy with them. Boy, they go loud with my 300B's.
I thought about building another speaker in which I could use the Alpha12 and the PSD2002 combined with a midhorn with an Alpha6 for example.
Maybe Adrian can offer me some information or tips.

Are the plans for the 8Pi allready available ?

Thanks,
Jim

The Alpha 12 could certainly be used in a three-way configuration. It works quite nicely in a π cornerhorn, so you could surely put a midhorn and compression tweeter on toip of that. Adrian's Alpha 6 midhorn would work well, as would a larger midhorn using an 8" or 10" driver.

The thing is that the Alpha 12 is really designed to be a full range speaker. It's best applications, in my opinion, are on infinite baffles or very large boxes. Its best feature is that its impedance curve is benign so there isn't much interaction with the output circuit of a low power SET with no feedback. Those are sensitive circuits, but the Alpha's don't cause problems for them. That, plus their low cost, make them ideally suited for two-way speakers used on SET amps. But the three-way idea you're looking at would be good too.

Wayne