I used to use a DBX 2-way crossover to split my signal, and then apply all the effects to just the higher frequencies, and then join the signals back together into one amp, but that involved a fairly elaborate rackmount system, and I'm trying to keep things simpler these days. I haven't kept up with the most current technology (I'm old), so is there now a simple (maybe pedal-based) method to split the signal by frequencies, so the deep stuff bypasses effects?