Hi everyone,
I have a small issue with a pair of speakers. A rattle (I think in english) with the woofer. The speakers are B&O Beovox3000(1970-1980) and Marantz PM57 amplifier. The speakers sound good, but at a mid-high volume, the woofer has a rattle... the cone and dust cone are made from paper, the surround is from some kinda of textile that looks pretty strong. I am not sure if they were ever repaired or something. Another thing is that the rattle seems to come only from a part of the speaker. If I touch the surround while is playing it intensify even more, to the point of really crunchy(?) sound. Also when nothing is playing if you press gently on the cone there is a sound like you would rub two pieces of paper, but nothing is touching, this happens with the speaker in the cabinet and with it outside. If you touch the speaker at 180 degrees , again: while is playing it has no effect(no intensification), and with no sound the "rubbing paper" sound does not happen. I looked inside, they seem in good condition. I saw some things on the internet. I looked inside, under the surrounding textile, and there where some big pieces of glue, you could feel them from the front as well. I have detached them, but still... also the other speaker has some big pieces of glue on the inside, but rattle does not happen, until I think if I push it to high volumes... Thank you. Also, I was thinking to put some new 10" woofers with rubber surround. Thank you, looking forward to see your suggestions.

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