Hello, I'm thinking about DIYing a small horn for my TAD ET 703 driver instead of the using the original TAD slot/horn). I'll be using it on top of a 1.5"-2" throat midrange horn like JBL's 9800/66000 systems. Does anyone have the specs for either system's supertweeter horn? The crossover point will be around 8k-10khz which if I remember correctly, iis about an octave lower than JBL's. Thanks