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.

tomcarr

Showing 8 responses by tomcarr

I called B&W again today hoping to be able to talk to a different tech.

Apparently, there is only ONE tech, and he isn't any help at all!!!

@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.

@erik_squires Thank you for the info. I'll contact Topping and see if I can get any info. What really surprised me was the tech at B&W didn't have any idea what could cause it to happen!!!

@erik_squires Good point!

Looking closely, it is vibrating like it's normal twin, but it also is moving very slowly in and out, about a half inch. Yes it's making bass. It sounds just like its twin.

Bear in mind this has only happened twice in a year.

 

@atmasphere Good advice!

I am supposed to be getting a new CD player tomorrow that I ordered a month ago.

I will be going through all the suggestions.

Thank you.

@erik_squires The woofer is just a slave...

Doh! I should have known that. Good point. Even more embarrassing, I've been involved with this hobby since 1975...🙄