I have a HT system that has XLS Encores with Rhythmik F8 subwoofers in the front. I would like to be able to quickly swap in a two-channel integrated tube amp to driver the front speakers as well as the subwoofers. The subs are currently on the LFE channel of my AVR. Does anyone have a recommendation for a speaker level to line level solution to allow me to run the subs with the integrated amp? I know that Salk does this with their Exotic 3's, which use the same bass section.