I use linear-phase EQ when I need a “manual crossover”. I EQ one signal with a low-pass then I invert phase and mix with the original to get the high-pass band. Before RX started supporting frequency feathering of selections, I used this technique to apply “gentle” edits that change the amount of processing in frequency. For example, I could apply 12 dB of noise reduction below 1 kHz, 6 dB of noise reduction above 3 kHz, and some crossfade in between.
