Steve, if your question was directed to me, the situation I discussed in the previous post would also apply to you if the assumptions made there are correct(this of course is uncertain at this time). You'd be feeding the modified front channel signals(for the rear drivers of the LFR1100)from the DSP box into the back surround inputs on the 3007. Yes, you'd have to use two of the present channels of your 3007 for the rear drivers on the LFR1100 rather than your back surround speakers. If you wanted to keep the back surrounds an additional two channels of amplification would have to be added.

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Enjoy the music, not the equipment.