Do you always want positive summation when dealing with placement and phase\/delay? Or does it make more sense to adjust the phase and delay to get the evenest response in the room and then EQ to taste? \n\nWith positive summation, you would treat both subs as one once phase-aligned and EQ the single input\n\nWhen not using positive summation I can eq each sub directly to impact the response of the other. This is how I originally set up my subs. The response is only flat at MLP but that's all that really matters in my space. \n\nThoughts?