Re: apogee 3x3s2 vs eaw 650z
Regarding the Apogee 3x3 -
Someone mentioned that they have sliding filters - they don't. Meyer had sliding filters, not Apogee. Regarding replacement parts, the mids (EV DH1) and the highs (Radian 1") are still available. I am not sure about the 15"s, but you can ask Bary at index. He's an Apogee expert and he usually has all the spare parts.
IMO the main drawback of the 3x3 is it's size and weight, it's big and heavy. Regarding the processor, it would be best to get the original Apoge processor. If you need to use another processor, I would advise to contact Bary, he could probably help you with settings for other processors.