Looking at the schematic, it would be easy to bypass the low-pass, wiring directly from the terminals to the woofers. Easily reversible. The high-pass can't be bypassed without digging into the PCB, which requires expertise.
The low-pass is unusual, combining a low frequency filter and what looks like a 6db/oct, first order. The subsonic filter is optional if the amp is up to the challenge. Some active crossovers incorporate their own 20 Hz rolloff. A one or two ohm, high wattage series resistor can be added to increase impedance but gain will have to be adjusted.
High pass (mid bass coupler) looks more like a backwards 18 db/oct bandpass.
Crossover points could be asymmetric as well.
