Jeff,

I can understand your point of not sending the same signal to each of the subs, thus the subs not having identical frequency response. However if the sum of both mono subs at a given frequency reach the listener at the the appropriate dB level, does it really matter if one sub is doing more/less work than the other since bass in non-directional anyhow? Also please post a link to the post you are refering to. I'll give it a read and see if there is anything there to sway my opinion on the matter.

Cheers!