Dr.Dre feat DSPManager
first thing to do is download DSPmanager (attached to this post).
Stock / non rooted phones
download and install DSPManager2.apk
Just installing the .apk seems to be causing a force close when editing the EQ for some people so stick to presets and all should be well.
download DSPManager-v3.zip put on to your SD and flash.
This also installs /system/lib/soundfx/ files from cm9 ROM for HTC one x - thanks to TripnRaver and also adds system/etc/audio_effects taken from DPS v1 fix for ICS
IF you do not wish to see a tutorial/ how I set dps up on my phone skip the rest of this post.
once installed open it up
first on the list is to move over to the headset tab, swipe left to right.
first option we need to set is Bass Boost
i set mine to Moderate as my headphones can't take extreme but set this to either Moderate/Extreme
next is to set the equalizer.
For this i picked Rock, reason being, as you can see it that it boosts the bass leaves the mids in the middle and brings out the highs so even when your eyes turn to water from the bass you can still hear that hi-hat ting and fizz
if you really feel the above two just don't make your brain turn to mush enough then you can set the "Loudness compensation" when using this setting change the EQ to treble boost and then use the Bass Boost to add back in the low end.
Hope this is at least a bit helpful to you guys remember this is just my settings play about with the options till you get the sound thats right for you.
v3 - added system/etc/audio_effects - Fixes FC on custom EQ
v2 - Added sys/libs/soundfx/
v1 - DSPManger.apk
I'm not going to take any responsibility if you bust your ear drums/headphones/ windows/other household items. Although making the cat jump from the bass cannon is totally my fault..
i didn't make this app it is part of the CyanogenMod