I should think that you would need to have specific goals in mind before you get started.

I did.

I'm confused.

The tradeoffs:

1) Lower sensitivity than our other arrays (88-91db target)

2) Higher crossover point to the subwoofer (100-150hz)

3) Less Sd (surface area) due to the smaller woofers

Advantages:

1) Lower cost

2) More tweeter choices to meet different budgets

3) Symmetrical coverage

4) Smaller cabinet footprint with less weight

5) Options for system impedance

What mid ranges have you selected as possible choices to reduce cost?

Why does "symmetrical coverage" mean?

How many tweeters?

And how many mid's do you think you will use?

Will it be a passive crossover design or an active design?

Do you expect to use separate cabinets for each of the mids or one giant cabinet for all?

Rex

Open baffle arrays present different challenges and in order to cross over to a subwoofer you need to apply a great deal of equalization. You also need a fairly wide baffle and for many wives this isn't possible There's also the problem of making it stable because all of the weight is at the front of the cabinet. There are also some design issues to overcome in terms of room response.

Having worked with the Eton drivers I think you'll find them better suited to a closed box versus open baffle.