Originally Posted by Snutze
... I didn't wall mount anything cause of the whole can't have a speaker near wall. ...
Wall mounting involves a trade-off, but like all trade-offs this one has a "But if you do this... everything's fine" option.
Here's a link that shows what happens when you mount a free-standing speaker on a wall. Scroll down a little, and you'll find diagrams and charts excerpted from Floyd Toole's book showing freestanding speaker response, and how it changes as you wall mount it in various ways. Note that we've suggested the wall placement shown on the right in the second pair, "on wall installation."
The "on-wall installation" chart's on-axis response shows a strong dip at ~200Hz, due to the Allison Effect, an interaction with the reflected wave from the wall. The frequency depends on the depth of the speaker, how far the drivers are from the wall. HOWEVER
, that dip is in the direct, on-axis response
. By placing the speakers above you, facing the front wall, you're going to hear the "Sound Power" response.
That has a gentle rise at low frequencies that most AVR room correction systems can easily eliminate. (Look up "baffle step compensation" if you're interested why.)
If high-mounted, front-facing doesn't do it, bipole/dipole speakers are the next option. These use two identical drives playing the same signal, one in phase (bipole), the other out of phase (dipole). (Most of these have a switch for polarity.) This produces a strongly varying sound field pattern that we humans perceive as a diffuse sound field. At a given distance, they are harder to locate than conventional speakers.
So... space your front speakers away from the wall, for good on-axis response, and don't worry so much about the surrounds in the suggested placement. It's a sweet spot application where the on-wall issues don't matter.