Biamping, yes or no?

You might get a second W4S STP/SE preamp, and use one preamp each for left and right channels. Use the balance control on the preamps to fine-tune the balance of low and high pass. Use one stereo amp each for left and right channels. You'd have to use Y-splitters on interconnects from sources to preamps.

I've never done this, but I imagine the Tyler D1 speakers would like it. Make sure to use star-grounding to avoid ground loop. Also, if using a power regenerator, connect line-level sources and preamps, but not amps, to the regenerator.

My point was that you might be able to use the balance controls on your preamps to perform the same function as an active crossover. Also, the channel separation is perfect with separate preamps for each channel. Lastly, you use the volume controls to adjust balance between left and right speakers at the listening position.

Wolf_garcia: Just to clarify, the method which I propose DOES IN FACT use the passive crossovers in OP's Tyler Acoustics D1 speakers.