Ha, ha. And here's something I'm going to ponder on the plane, something that no-one ever talks about. Doppler distortion to other frequencies caused by the woofer cone's movement reproducing low bass frequencies. In and out, in and out. . .I'll raise this question with Ian C and some speaker engineers in Las Vegas. Hmmmm. . .

Regards,

Alan Lofft,
Axiom Resident Expert (Retired)