How Is Bass Divided Among Speakers If No Sub?

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My room is big enough to have large full range speakers as a center and surround channels without crowding the seating area. Power would not be an issue to the surround speakers..they will have plenty of power.
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Mitch, I would check what your processor does. THX may even change whether,or how much bass goes to your surrounds. My processor says full bass to the rears, but without some Thx setting, the way I read it. Maybe that's part of the reason for different info being given when full size is selected.

It depends.

Dolby suggests discarding the LFE channel when there is no sub-woofer for headroom reasons.

(The LFE channel has 10dB more headroom than the screen channels, so you're looking for reference level SPLs of up to 115dB SPL at the seats which becomes 120dB at the speakers accounting for propagation loss. With a 90dB efficient speaker that'll take a 1000W amplifier and more displacement than most speakers are capable of).

That headroom mentioned by Drew_eckhardt helped out finding more with Google on my end. Some THX processor has some features that others don't. No wonder this can make someone frustrated. This link has a little more. [http://www.hometheaterhifi.com/technical-articles/163-the-misunderstood-01-lfe-channel-in-51-digital-surround-sound.html]