Simpler is better, but not when you're trying to coax good sound from cheap drivers. Here's the final crossover. Those large parts that aren't attached to the board are a conjugate filter for the woofer array. It consists of a 10mH iron core inductor, a 16 ohm resistor, and caps totaling 1,000uF, all in series across the woofer terminals. It compensates for a 30+ ohm peak at the tuning frequency and smooths out the bass.