Woofers pumping

On two occasions I have noticed the woofers of one speaker moving 1/2 inch excursions. Both times the SPL was peaks of 93 dB.

System is CD player, preamp, amps.

This has happened with two different amplifiers.

I spoke with the tech at B&W and he didn't have an answer.

tomcarr07-17-2023 8:45pm

erik_squires Details Discussions Posts This discussion Message User 16,016 posts 07-17-2023 at 09:15pm Copy Comment URL Report Comment Edit Delete Well, if it's playing music it's normal... :D Depends on a lot of things, but if it does not happen when there is no music playing and if you swap the inputs to the amp it switches speaker then you know it's a signal issue.
hiend2 Details Discussions Posts This discussion Message User 403 posts 07-18-2023 at 05:34am Copy Comment URL Report Comment Edit Delete B&w woofers on my 801's had a condition called Oil Canning. Was the excursions more evident on one recording over another?
tomcarr OP Details Discussions Posts This discussion Message User 1,486 posts 07-18-2023 at 01:06pm Copy Comment URL Report Comment Edit Delete @erik_squires It's only happened twice. With two different amplifiers. Both times the right channel only. The left channel the woofers were not pumping. Already thought of swapping channels but haven't taken the time to do it. @hiend2 That's interesting. I have never heard of "oil canning". The speakers are B&W 803 D3. The excursions were only evident on two songs, played at levels around 90 dB, from the right channel only, over a period of the past year.
audionoobie Details Discussions Posts This discussion Message User 357 posts 07-18-2023 at 01:15pm Copy Comment URL Report Comment Edit Delete Never play those two songs again.