Actually all except center channel set to large. Have 8 inch 3 ways for rear back/rear surrounds and d'appolito arrays with 2 8 inch woofers each for my towers. My center channel probably could be large as well, 2-5 1/4 inch drivers with tang bend dome tweeter in ported cabinet. With YPAO it sets the xover for the sw to 40 as in the rest of my speakers are getting plenty of bass output "out there". While my 10 inch Klipsch can put out below 40 and does make a difference, I adjust the xover point up to THX xover of 80. I probably could get away without the SW if push came to shove except for those films like Die Hard, etc., that simply need a punch in the chest bass response. I use "Both" for the sw setting.
The information on YPAO equalizer is a little confusing, not a lot, just a little. I wish the manual equalizer had all the same capability if only to help me understand what the YPAO is doing. The manual equalizer may infact have all the same adjustments I just haven't found how to get to them. The manual equalizer is more like I remember with regular equalizers and db adjustments for particlar frequencies. And YPAO will get down to 32 but the manual equalizer stops at 63.
Here's an example of what I mean by confusing. Page 135.
"YPAO adjusts frequency characteristics to suit your listening requirements using a combination of the above three parameters (Frequency, Gain and Q factor) for each
equalizer band in this unit’s parametric equalizer. This unit has 7 equalizer bands for each channel. The use of multiple equalizer bands enables more precise adjustments of frequency characteristics (as in Figure 2). This is not possible using only a single equalizer band (as in Figure 1)."
It could be wrong but appears that the manual is using the same word, "band", to mean two different things. I'm still trying to figure out what components actually make a band a band. So each channel you can adjust 7 bands. Ok, what determines one band from another?
E.B. White said, "I arise in the morning torn between a desire to improve the world and a desire to enjoy the world. This makes it hard to plan the day."