Modding/Tuning AKG K511

I picked up an AKG K511 on Amazon for pretty cheap.

Figured what the h3ck, it’ll be interesting to see what you can get for under $10.

Detail-wise, they’re pretty good, at least for the price, but I’d like to see if I can brighten them up a bit. The sound seems pretty overwhelmed by the midbass, making them sound very dark and muddy.

What things could I change to make them sound brighter? There is almost no foam in the back, and I don’t think there’s any in the front.

I’m not looking to make the next modhouse argon. I’m more trying to broaden my understanding of headphone tuning and modification in general.

Any tips/tricks from experienced modders out there would be greatly appreciated.

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