In reply to:
DJ, are you backhandedly telling me that when i put a dvd-a in, and use 6 channel input on my rxv1300, the speakers are all automatically set to large?
Essentially, yes. To your receiver all speakers are "large" when 6-channel input is enabled (even though the setting doesn't technically go to large.) Think of it this way:
What exactly does setting speakers to large vs. small do? The sole purpose of this setting is to engage bass management. The bass management system in all modern receivers is done digitally. Receivers cannot process the data given to them when the data is analog. They must first convert the signal to the digital domain, because the data has to be digital for the receiver to do ANY processing (including bass management). Harman Kardon, to my knowledge, is the only receiver manufacturer that uses ADCs on all channels. This enables bass management on the 6-channel input since the data is converted to digital and the crossover circuitry is allowed to work. With almost all other receivers, only the front two channels are given ADCs so you can enable all of the processing options such as Dolby ProLogic IIx, dts:Neo6, or even bass management. There may be a very small minority of non-Harman Kardon receivers out there that have ADCs on all channels, but I don't recall seeing any - especially not from Yamaha (although I haven't looked at the RX-Z9 specs yet).
What I said does not mean that bass management cannot be done, however. It just means it has to be done prior to amplifier input. This is where a device such as the analog Outlaw ICBM comes in. It solves the problem that almost all receivers have, and it does it all in the analog domain, so you do not have to worry about up-sampling and down-sampling the signal. (I would personally rather have it done digitally, however.) Additionally, most DVD-A and SACD players offer some sort of bass management feature, built-in. This essentially takes the place of the one that is built in to your receiver.
In summary, while your receiver treats all speakers as "large" during 6-channel input, they can have bass management done to them if it is done prior to reaching the amplifier.