hi, i have a REL Strata subwoofer which accept high level--speaker cable or line level input. been using it on my stereo for years, now i would like to run it on my HT system. now the problem, how to connect it to receiver? if using high level, only the bass from front ch would direct to REL, am i right to say that? if so, bass from center and surround would be lost; or would choosing large for front and small for the rest would direct all bass to REL? if this work, there would be no dedicated sub ch, good or bad? another way is to use the line level, the REL has stereo L/R input which was design to accept stereo preamp input. connect to the front ch pre-out, it would be the same scenario as the above.... can i just connect the stereo line level from REL to the mono sub pre-out on amp?