I understand, generally, what tri-way amps are used for, but I have a specific question, and haven't been able to find an answer online.

Let's say I have a Tri-Way compatible amp. 75x2 or 100x1 bridged (both at 4 ohms).

If I put a Tri-Way adapter on this amp (unbridged), how much power will go to each of the regular channels, and how much will go to the sub?

 

http://www.eatel.net/~amptech/elecdisc/caraudio.htm
Click on the tri-way speaker link.