<font color='#000000'>First off, I don't personally believe in using large speakers with a high number of drivers and cross-overs. This means an amp will make an attempt to properly power multiple drivers and mulitple sets of passive electronics and hopefully sound like something pleasing to one's ear. To buy large, full-range, or near full-range speakers, I believe you must spend a pretty penny to get high quality componentry and design, to make it worth your while. Many large speakers are meant for one thing, to sound large.
However, I do not find many large speakers to be very accurate, those that fall under a certain price ceiling. Thats not to say that there aren't many large "high performance" speakers out there, rather those that I could afford just don't do justice to what they should. So basically I just look the other way when it comes to full-range or large speakers, because I can't afford any that I could fully exploit.
Most people don't use high caliber amps to push these supposed "full-range" speakers. Bass is a very hungry portion of the audio spectrum we can hear and experience. One must have a highly capable amp to properly control, blend, and transition this critical portion of audio. While most of these larger speakers can produce an honest tone down in the 40's, they are still not full-range. Full-range is 20-20,000hz. Also, most natural music recordings don't even call for full-range speakers anyway.
In most scenarios, people hook up inadequate amps to push inadequate speakers and the result is far from ideal. I don't know anyone who has really good amps matched up with mediocre or sub-par speakers. I believe speakers are the most crucial point in any system. To expect them to amaze you while only pushing them with inadequate electronics will get one nowhere.
2400,
You must remember, you'll have to take any wiz-bang equalizer's results with a grain of salt and always perform the necessary tweaking or fine tuning yourself. YPAO is basically joe six pack's method of setting up his system without having to exert much effort. Its a nice feature, but not and end all in system calibration. Like most everyone with these units has experienced, at the very least the sub level will probably need to be re-adjusted.
YPAO classified my mains as large also, but a few simple corrections made them sound like they should.
Please excuse my long-winded ramblings above. Did I answer your original questions in any way? Its late, so you'll have to get me back on track!</font>