It's also important to realize that's 105dB PEAK. Think glass window breaking or the impulse of an explosion, it's only sustained for a few seconds, and many Avrs with decent capacitor banks can handle a bit more than their continuous rating peak. It's really the subwoofer that struggles, because a lot of the time during very heavy bass scenes, 110-115dB LFE sustained for several seconds is quite common.
Also keep in mind at such a short distance, your perception of spl changes. This is a well known fact in film mixing. For example, if someone intends to mix in a small room (like a bedroom for example), it's recommended that they calibrate to 79dB vs 85dB, because in a small room, 79dB sounds the same and will translate the same on a theatrical dub stage. This is one reason why many tend to listen below reference level in their living rooms. Big rooms tend to flatten out the dynamics, so the really loud parts don't sound so loud. This is also one reason engineers also do a near field HT remix for bluray, because a theatrical mix won't sound like it sounded in the theater in a smaller living room because of this.
Movies are generally mixed to an 85dB average level with 20dB peaks (105 dB for the speakers, but an additional 10dB for the LFE channel). You can generally hit very high levels for sure with current amplification. Sometimes the sensitivity figures are a bit low, or not accurately stated (2.83V is 1 watt for 8 ohm, but 2 watt for 4 ohm for example, so depends how it's spec'd as to any adjustments needed). Takes a doubling of power to gain 3dB spl. I think you'll be fine in any case.
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