No, at least not on the Denon AVRs. That's why the separate setting is there.
This was noticed by another gentlemen on an Amazon review of the AVR-2807 (read 5th and 6th paragraphs of "Flaws substantially outnumber the good aspects, March 30, 2006"):
http://www.amazon.com/review/product/B000F44NU4?filterBy=addTwoStarHere is what he noticed:
"If you do not use a subwoofer, the main right and left speakers will always be treated as "Large" speakers, and not be subjected to high-pass filtering. If subwoofer is set to "Yes", an additional subwoofer mode setting is enabled, which controls how the subwoofer output signal is derived. If you select "LFE+Main", the bass from the main channels is added to the subwoofer even though that bass is not filtered out of the main speakers when they are set to "Large". The instructions for setting the crossover frequencies state that if the main speakers are set to "Large", the crossover frequency for them cannot be set or adjusted unless the subwoofer mode is set to "LFE+Main". That is the appropriate behavior for the case when subwoofer is set to "Yes", but the crossover frequency assigned to the main speakers is meaningless if subwoofer is set to "No", and as such, the capability to adjust that crossover frequency for the main speakers should have been disabled in the on-screen menu. It is confusing to allow you to make an adjustment that has no effect, and because of other issues with the automatic equalization, this caused me to wonder if high-pass filtering was being applied to the main speakers even though subwoofer was set to "No". "LFE+Main" was evidently the default setting for the subwoofer mode, and in order to change it in the effort to disable the inconsistent crossover setting, it was necessary to first set subwoofer to "Yes", then change the mode setting from "LFE+Main" to "LFE", and then set subwoofer back to "No".
The manual states: "The crossover frequency mode is valid only when subwoofer is set to `ON' and when one or more speakers are set to `Small'". This is clearly incorrect, i.e., if subwoofer is set to "No", the main speakers will be set to "Large", and the crossover frequency setting for the surround speakers that are set to "Small" is meaningful. Even more confusing is the fact that there is a crossover frequency setting enabled for the LFE channel even though the crossover frequencies for all the other channels are set independently. This setting is separate from the one that allows you to apply a common crossover frequency to all speakers for which a crossover frequency is meaningful, which is useful in the case of a sub/sat system where all the speakers except for the subwoofer are identical. The manual says nothing at all about the separate and mysterious LFE crossover frequency. "
