Maaaan I haven't posted here in a long time - but I recently have been on sort of a bass kick lately, and I ended up picking up a new (to me) cab, since I found a good deal on a used powerhouse 4x10. I haven't had a chance to get it up to jam-level volumes, but it's been sitting in my living room and I've been playing through it at home-friendly (mostly) levels. The tl;dr version is that one of the speakers (top left) is making a kind of papery/crunchy sound (it sounds more like electrical noise than distortion to me), but only when playing an open low B, and only with a good amount of volume to it. It's kind of a subtle noise though. I'm not sure if it's been there the whole time and I didn't notice, or if it's developed since I brought it home, or what. I've not had the chance to turn the cab up louder either, to jam volume, to see if the sound goes away when played at proper volumes. I cranked it a bit the day I bought it and I don't remember hearing anything funny at the time - but I can't get away with that same volume test at home. I'm reasonably sure it's the speaker and not something else vibrating, just because it's only the one speaker doing it. Things I have tried so far: - Different bass (it's not the bass) - Different amp (it's not the amp) - Different speaker cable (cables are fine) - Took the grill off (the grill is not vibrating) - Took the handles off the side, put it back on tight (the handles are not it) - Lightly dusted the speakers off to remove any particulate that might be vibrating on it (made no difference) - Tried to look at the speaker from the back, but couldn't see anything out of place - Tried to remove the speaker for a better look, but it's sealed real well into the cab and I couldn't get it out. - The panel/board at the back also looks clean/normal as far as I can tell. Nothing inside is rusted or anything in terms of wiring. Anyone else have some troubleshooting suggestions? Maybe the speaker is just on its way out? I've heard of stories of stuff getting stuck in/around the magnet making noises? Is there an easy/safe way to remove the speaker from the cab? If I find some time, I'll see if I can get a recording with the noise in it, since that might illustrate better than my bad description.