Just a quick question, you do realize how loud 105 db actually is and that most HT system are never played back at those levels. The system is calibrated so that you can achieve reference levels when the volume is set to '0'. I listen at -30 to -10 depending on the film and my room is ~4000cf, vaulted ceiling etc.

And to answer your question to John, IMO, it is always possible, anything is possible, probable is another story and yes clipping is what damages speakers.
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Jason
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TTTHHHPPPPPTTTT!

My HT