It's best to eq with the sub only. You want to first establish and reach your target response, after which you add the mains to check for interaction.
Using the phasing on your sub combined with possibly repositioning of the mains can somewhat reduce the interaction.
Once that's complete, you can often tweak the upper frequency filtering to further help. The effectiveness of the equalization on the overall curve is reduced at higher frequencies but can certainly help around the crossover frequency.
brucek
Using the phasing on your sub combined with possibly repositioning of the mains can somewhat reduce the interaction.
Once that's complete, you can often tweak the upper frequency filtering to further help. The effectiveness of the equalization on the overall curve is reduced at higher frequencies but can certainly help around the crossover frequency.
brucek