byoung
Well-known member
So I've got some weirdness going on in one of my studio monitors that has me a little frazzled. It's a pair of dynaudio bm6a's and they have never given me issues before, and I've always treated well. I was giving a tr808 a run for it's money today when I noticed that the right cabinet was 'rattling' with low frequencies, sort of a screw was loose int the cabinet sort of buzz/rattle, picture on the wall rattle. I inspected it visually and even got out an allen wrench to make sure all screws were solid. Everything checked out, so I listened to it and it sounds like it's most apparent at the rear where the bass port is. I switched speakers l/r and it still had the rattle while the other remained clean.
I finally ran a sine wave through them and below about 100hz the one speaker/cabinet starts to make this noisy rattle, when I get to about 60hz one has tight clean bass the other has a little less bass but a sort of pink noise behind it. I have heard you can check for a bad voice coil if you gently and evenly press on the woofer, so I did that(even though I cringed the entire time), but it was super smooth. So now I'm not sure what to think, it seems fine until you get below 100hz. So I don't know if a blown speaker would react this way, since I've never blown one or if it might be something in the electronics/amp possibly? Anybody have any suggestions before I go out and buy a replacement woofer?
I finally ran a sine wave through them and below about 100hz the one speaker/cabinet starts to make this noisy rattle, when I get to about 60hz one has tight clean bass the other has a little less bass but a sort of pink noise behind it. I have heard you can check for a bad voice coil if you gently and evenly press on the woofer, so I did that(even though I cringed the entire time), but it was super smooth. So now I'm not sure what to think, it seems fine until you get below 100hz. So I don't know if a blown speaker would react this way, since I've never blown one or if it might be something in the electronics/amp possibly? Anybody have any suggestions before I go out and buy a replacement woofer?