Originally Posted by Rick Craig
The shading is proprietary to this design but I can tell you that it works very well. I've set up a test rig that allows me to experiment with Hann,Legendre,etc. so I can compare the results very quickly. Sensitivity is in the 93db range after shading is applied. In some frequencies you actually incease output with the shading due to reducing phase cancellation.
This system is using a DEQX for DSP crossover / EQ functions so we can easily adjust the balance for HF loss. Due to the room design (all speakers hidden) it dictated straight cabinets so the surrounds are straight as well.
Very nice! Great sensitivity as well! Will these get documented on the Selah Audio site like the other arrays, with measurements, etc?
Playing around with shading can yield some not-so-intuitive effects on freq response and directivity. Glad you found a good solution. Shading the MF and HF lines differently can really help things, as I'm sure you already know.
If you can, post up pics of the implemented system before they are hidden from view with screen/cloth.