Please follow the order for max quality. Don’t forget to put every band, especially the reduction ones. This preset was designed for maximum iOS 14.

Eq from 20 hz with +2 dB gain and 0.0042 Q factor ;

Lowshelf from 20 hz with -18.5 dB ;

Lowshelf from 80 hz with +1 dB ;

Lowshelf from 100 hz with +4.5 dB ;

Lowshelf from 900 hz with +9 dB ;

Lowshelf from 1200 hz with +1.5 dB ;

Lowshelf from 1500 hz with +2 dB ;

Lowshelf from 1600 hz with +1 dB ;

Lowshelf from 4300 hz with -38 dB gain and 0.195 Q factor .

PS: this version is compiled/compressed

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edit: 1) fine-tuned below 100 hz

2) fine-tuned the 4500 hz band

3) fixed missing 20 hz sounds