Both could be possible...

Except the x-overs were modified after the move, and the actual values of the components with in the cross-over are exactly the same, so the x-over performsexactly the same tricks as before.

Also, I don't understand how this wouldn't happen on music when it is played at much higher volume...
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Speakers
Mains: Ninja Master Polk LSi9s
Center: Ninja Master Polk LSiC
Surround Sides: Slightly Modded Polk LSiFXs
Surround Rears: X-over+ Modded Polk LSi7s
Subs: Outlaw LFM-1 EX and Polk 505
Electronics
Sherwood R-972 (Waiting for the Outlaw (9XX)
Outlaw 7700 Amp
Oppo BDP-103
Signal Cable, Advanced Technology, and Outlaw Audio Cables
2 APC H-15s and an UberBUSS for good measure