There's a free version, Basic.never heard of It but I'll decently give it a try If it isn't to expensive. thank's!
https://eqmac.app/
There's also EQMac2, an older version, which is also free.
https://eqmac2.en.softonic.com/mac
You may have to adjust Sound (under the apple/System Preferences) to use EQMac as the output. It will lower the volume slightly when you apply it; that's normal.
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