BiAmping JBL 4367 Speakers

Are you talking about the jumpers between the low and high frequency binding posts, or the actual crossovers mounted inside the cabinet?

Remove the jumpers, use the external binding posts, leave the internal passive crossovers as is.

Refer to the 4367 online manual under bi-wiring with two amplifiers.

You can definitely use the external binding posts, no problem at all. Be sure to remove the jumpers between the high and low speaker terminals. For me, I’ve been multi-amping for 48 years, the best sound will immerge when you disconnect the internal crossover completely. If you just bypass the crossover by jumping the input and output terminals, you still have the resistance and reactance that the crossover circuit imparts. The circuit affects all the driver impedances and the load that the amplifiers see.  It can be both heard and measured by test equipment. Even a DVM can measure the difference in DC resistance at the drivers and at the amplifier outputs. You will definitely hear an improvement by bi-amping, so try it your way first. If you like the improvement, then you can get inside of the speakers and make the complete change. Best wishes on your journey! I will never go back to a single amp until I’m forced to move into a senior living facility!

Note, if you remove the internal crossover entirely you will need to tri-amp!