Where are your rears located, and where did you place the (pseudo)rears?
All of this investigation was to test the BL4s in surround sound mode (see the BL14 versus BL4 thread).
So in testing Ice Age 3 I tried a range of [SPEAKER] settings, including the second pair of BL4s daisy-chained from the BL11 and positioned the speakers as follows (I am centre of the clock dial and looking to the BV8 at 12 o'clock):
12 o'clock = BV8 centre speaker & BL11
11 & 1 o'clocks = BL3
10 & 2 o'clocks = daisy chained BL4s ie a subset of the sound as routed and filtered through the BL11
7 & 5 o'clocks = BL4s
Surprisingly this pseudo 7.1 setup was actually an enriching experience,
and running in pseudo 6.1 mode was good too !
At 56 seconds into the trailer some ice falls off the eyes of the squirrel ... and the sound of the tinkling ice is clear and is relocated in 6.1 mode !
I then got stuck into testing "Gravity"'s trailer .... depending upon how tomorrow shapes up I may redeploy this lot and test against "The Hobbit" the desolation of Smaug"