It looks like the limiting component ( for sensitivity ) in this overall design will be the inclusion of the T350 tweeter .

I'm thinking the target sensitivity will need to be @ 100 db / 1watt, which purposely tosses a few db or so, so as to help incorporate the EV tweeter .

It ( the EV tweet ) appears to have an efficiency in the neighbourhood of low 100s ( once EQed flat 10 - 15K) . It appears to be good up to 15K .

I've never seen a spec sheet for the T350 .

Here are 2 similar spec. sheets / the ST350 & the T35A which will help ballpark the performance of the elusive T350 .

T35A

ST350B

John, once you have your newly purchased test gear up & running , I recommend you spend some time testing these tweeters ( with different passive crossovers ) to see what they can really deliver in response .


<> cheers