Hi,

While cleaning my Sennheiser HD 428 from dust and small hairs i accidentally dented the dust cover (?) part with an blunt needle, does it affect the sound quality now? how to get it back to previous state?

https://preview.redd.it/fh6pm6uov5oa1.jpg?width=3000&format=pjpg&auto=webp&v=enabled&s=786320c61a7810c12ee5bf10fe3c1be7e38f069c

https://preview.redd.it/sxhd86uov5oa1.jpg?width=3000&format=pjpg&auto=webp&v=enabled&s=a53aeebc3fcd9ef6e2a34b854551b7201e565f5a

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Hydrosplash t1_jchi5g4 wrote on March 16, 2023 at 9:31 PM

#2,247,945

I have bad news for you...what you've dented is actually not the dust cover but the driver diaphragm, and that will most likely affect the sound. This can potentially be fixed with a little bit of suction applied to those dents once you remove the cover and gain access to the driver.

ramm_master OP t1_jcho8l1 wrote on March 16, 2023 at 10:11 PM

#2,248,243

Replying to Hydrosplash (#2,247,945)

Thanks for reply, how to notice a change in sound? so far i don't hear rattle or buzzing for example, can double sided tape help to undent it without removing the cover?

Hydrosplash t1_jchpmmr wrote on March 16, 2023 at 10:21 PM

#2,248,310

Replying to ramm_master (#2,248,243)

Use a full sine sweep for testing and pay attention to any unusual sounds especially in the bass region. I think it's doable with the tape but you'd have to be extra careful to not apply too much force.

ramm_master OP t1_jchrpni wrote on March 16, 2023 at 10:35 PM

#2,248,427

Replying to Hydrosplash (#2,248,310)

I tested on many left right, different frequencies and bass heavy videos on youtube and on higher volume, didn't notice any unusual sound or change yet.

Hydrosplash t1_jcht8ca wrote on March 16, 2023 at 10:46 PM

#2,248,523

Replying to ramm_master (#2,248,427)

Then i guess the damage is not significant enough to cause any audible changes, if there's no distortion - you're good.

ramm_master OP t1_jchx9sa wrote on March 16, 2023 at 11:13 PM

#2,248,775

Replying to Hydrosplash (#2,248,523)

I don't hear any distortion, but i'm very angry about how stupidly i handled it and concerned there are some frequency changes because of the dents, don't know if i should try the tape method or just leave it, didn't know this plastic is so very thin and bendable with even a soft touch.