I have an old M&K Volkswoofer III (with a new driver) that requires speaker level input. It has a servo amp that picks up the speaker level input, performs active equalization, and drives the woofer. It uses passive low pass and high pass crossovers, also speaker level. I have used this sub in two channel arrangements and find it to be quite satisfactory. Good response, unobtrusive, no boom, and improving quality of mids and highs. I am considering using this sub in a 5.1 surround arrangement that includes an Integra DTR-5.4 receiver and 5 Paradigm speakers: 4 Atoms and 1 CC-170. None of this surround sound equipment is purchased yet. My proposed setup would be as follows: a. Tell the receiver that I have no sub and that the front L-R speakers are large. My understanding is that this will re-route all bass that would normally go to the .1 channel so it is split equally to the front L-R channels. b. Run the front L-R speaker outputs to the sub, where it is split and used to drive the woofer and the front L-R speakers. I have some questions about this. 1. Apart from differences in amplification channels and crossover method, will I retain all the bass information this way? 2. Would you expect any sonic problems to be caused by this rerouting of the bass signal? 3. Assuming that the subs work fine in two-channel reproduction, is there any reason I would not like this setup? 4. Conversely, apart from potential improvement in sub quality from buying a new sub (which is not the issue here) is there any reason I would find an equivalent pre-amp level sub powered by the .1 channel to be more satisfactory? Thanks in advance.