First off, here is a quick list of some of my equipment that will come into question in this post. Sony STR-DA30ES Receiver A pair of Infinity RS-5s used as fronts 8" Atlantic Technology 162PBM Subwoofer :b The first issue is with the receiver. Anyone with a 30ES or 50ES may be able to explain this a little better for me. The main problem is the Sony 30ES Receiver has a fixed crossover. I cannot tell what it is set at, but in the past I was told that it was around 100Hz when speakers are set to "Large" and a little higher (125Hz-150Hz?) when set to "Small". This of course only refers to any situation when the receiver is not working with Dolby Digital. When DD is engaged, NO bass is sent to the Sub when speakers are set to Large while some bass is sent to the sub when speakers are set to Small. (For those with similar Sony receivers, this bass management is indicated when the "S.WOOFER" light is on.) There are some RARE occasions (I can only think of the AVIA subwoofer calibration chapters right now) where the receiver will be decoding Dolby Digital, have speakers set to "Large",and also have low bass sent to the subwoofer (S.WOOFER light ON). Normally, and what I have found to sound the best,is to set my mains (RS-5s) to "Large" and my center and rears to "Small". Now, when I listen to music or watch movies in 2 Channel stereo or Dolby Pro-Logic, this setup works OK. The receiver still sends low bass info to my sub. Although I would prefer a lower crossover, like, say 80 Hz, this is acceptable. It's a entirely different story when running Dolby Digital. With my preferred setup described above, the only low bass that gets sent to the sub is the LFE. Now I know I have towers, but IMO, they are in no way full-range speakers. I'd like to route the low bass to the sub, just like when using 2-channel and Pro-Logic. The only other option is to switch the mains to "Small" (which I used to do) but this option just sends TOO MUCH bass to the little subwoofer. When this option, it just seems like the AT 162PBM is working overtime and then some. So my decision has been to just leave the mains set to "Large" until I can upgrade my equipment. Which is now what I am thinking of doing. I's like to buy an SVS. A 20-39 PCi to be exact. I know these are massive subs and will be an ENTIRELY different experience from an 8" sub. If I get an SVS, I'd like to be able to switch my mains to "Small" so I can get that low bass off the mains and to the sub. But, with my current problems with my crossover situation above, will I be asking too much from the SVS? With the fixed crossover of the Sony, it would be similar to having satellite speakers (which I don't). If the SVS can handle it (I'm sure it can), would I be hindering the performance of the 20-39 PCi in any way? The ideal situation, for me, would to be able to crossover at about 80Hz. Is there anything on the market that would allow me to bypass the Sony Receiver's settings until I can also upgrade the receiver? Would Outlaw's ICBM work?