I assume that the DEQX is in your pre-amplifier position. Does using the DEQX negate the use of a pre-amplifier? I would imagine that would impact the overall SQ, but allow more precise adjustment of the HPF to the SL speakers. What order HPF are you using with the DEQX? I was hoping to be able to use first order HPF to the SL speakers with a capacitor/resistor interconnect, but then use something like a fifth order LPF to the subwoofers, with the LPF crossover around 50-60 Hz.