Disconnect the woofer

Contrary to audiophile wisdom, crossover networks "soak up" almost no power, even when all the drivers are connected. If they did they would get hot, and if mounted in a sealed enclosure stuffed with fiberglass or wool, very hot.

Disconnecting the load on the low pass leg may affect characteristics of the high pass leg.

Rodman99999...I don't have a schematic of such a complex crossover. Have you calculated the power dissipation? (I bet it is darned small). If you can't do it, provide a schematic and I will.

Rodman99999...The originator of this thread was concerned about "crossover parts that make up the low pass to the woofer still using up energy from my amp".

If you check my prior comment you will see that I was also concerned about the effect on the high pass signals.

I am not familiar with other Maggie crossovers, but the MG1.6 crossover, while simple in concept, has features which many external low level X/O lack. High pass is a simple 6dB filter. Low pass is 12 dB. The break frequencies are not the same, and the highs are connected out of phase. Evidently Magnepan has designed its crossover to accomodate characteristics of the unique drivers. I would have to think twice before biamping a MG1.6. Rather, I rebuilt the passive X/O using high quality parts.