BillFitzmaurice.info

I setup the xti 4000 to stereo.

I will have 2 Titan 39 (3012lf) on one channel in parallel with the crossover at 45 and 100hz.

The other channel will have 2 Peavey PR15s (cabs) with the crossover at 100 to 20khz.

Is this correct?

yes. 48db on both for 100hz and at least 18db on 45. Personally, I do 18.