DIY Waveguide loudspeaker kit

[markus76]

So for 500Hz we would end up with 22.5" unflared? That's big but is it also impractical? How would the specifications for a matching mid-woofer look like?

[gedlee]

Originally Posted by markus76

So for 500Hz we would end up with 22.5" unflared? That's big but is it also impractical? How would the specifications for a matching mid-woofer look like?

I calculate 30", not 22.5". There are a lot of compression drivers that could go down that low, problem is that none of them could go high enough. So the simple extension of directivity down a single octave makes for a huge addition in complexity.

[markus76]

Originally Posted by gedlee

There are a lot of compression drivers that could go down that low, problem is that none of them could go high enough.

None made by B&C or none like in "does not exist"?

Best, Markus

P.S. What about a coax like the http://www.bcspeakers.com/product.php?id=0000000035 ?

[gedlee]

Originally Posted by markus76

None made by B&C or none like in "does not exist"?

Best, Markus

P.S. What about a coax like the B&C SPEAKERS ?

I've never tried that driver, it looks good - on paper. My experience with coax compression drivers has not been good. You can get them to add OK on-axis, but the off axis response at crossover always goes to he11. At any rate a waveguide that large and that driver would push the costs up by almost five times at least. Not an inexpensive solution even if it is possible.

[markus76]

I'm talking about your signature dish - you can do better than the Summa

[gedlee]

Originally Posted by markus76

I'm talking about your signature dish - you can do better than the Summa

Markus

I'm not certain that lowering the crossover point would necessarily improve things. Personally I doubt that it would.

Improve on the Summa!? Quite henestly the only problem that I have with it is its size and cost and your proposal makes both of those attributes much worse. The current Summa is not well engineered for low cost, and it could be. It's current price tag is prohibitive and its size is not attractive. So if, or when, I attempt to fix those two aspects of the design, I won't be using a bigger waveguide and more expensive compression driver.

[tinitus]

3way

[markus76]

Nobody wants that.

[markus76]

Originally Posted by gedlee

I'm not certain that lowering the crossover point would necessarily improve things. Personally I doubt that it would.

How can I convince you?

[gedlee]

Originally Posted by markus76

How can I convince you?

Build one.