Help with a PLLXO

[gorhamn5]

I'm building a small portable sound system with a woofer and two full range speakers. I have several small class-d two channel amps that I would like to experiment with. My goals for this system are as follows:

• Lightweight
• Cheap components
• Acceptable sound quality
• Simple design

The idea of a passive line level crossover seems like a good option for this setup (small, simple, cheap, etc.)

monoXover 2-way pre-amp audio crossover

This would allow me to use one channel for the woofer and the other channel for the two full range speakers.

However I understand there are some drawbacks to using filtering at the line level such as insertion loss. Is this a horrible idea? Can anyone suggest something else to achieve my goals?

Any input on this setup would be much appreciated. Thanks!