I just recently purchased a complete Cambridge Soundworks surround system, centered on a Marantz SR9300 receiver and the TI500 towers. I'm very pleased with the MC500 center channel and all 4 SR300's surrounds. Even the TI500 towers are superb in the highs and mids. Only gripe I have is the bass output...I’m hardly a bass demanding enthusiast, but I do expect some room shake. From 2 10" subs 300 watts each I should be getting more output then this....It doesn't seem to handle very much power either, if I crank it, it tends to distort and pop very easily, especially with certain frequencies. Is there something wrong with these towers specifically, or is this a flaw of the line in general. Are the demands I expect of them too great?? I mean it's not bad really, they do provide some bass fill, it's just not the "deep and thunderous bass" advertised. Their reviews both from the site and from here seemed positive. I have it set for single amplification, (not bi amped) and then the RCA sub out to sub in. The majority of the cost of the setup went to the amp, and while the speakers are not cheap, their not exactly prices as hi end either. Just looking to see if this sounds about right or something is wrong with them, or me. In the mean time, I gave them some help. I had a Sony SA-WM40 which I’ve loved since the day I got it. It's a 12" 120 watt beauty of a woofer. I've yet to peak it, and I’ve run it very loud. It provides more bass by itself then the 2 10" 300 watts put together, it gives me the shake I’m looking for, and only cost me $150 (I think) So how does 1 120 watt sub outperform 2 300’s? Right now I have them linked, amp to the Sony line out on that to the towers. The performance of that lil sub is what really has me questioning either the quality or the rated specifications of the TI500 towers. I don't think it's a problem with the built in amps, I just don't think the installed cones can handle that much power. Is the included sub just a gimmick, can any integrated subwoofer ever compete with a stand alone dedicated sub?