this should be brought to the xda forums. Maybe they will know a better place to start
I wanna say it might be a hardware issue.
My D3 had horrible sound (music, speaker, etc). I had to put in for a replacement due to a broke screen, and the re-firb they sent me was 10x louder in every way.
Both were rooted, de-bloated and running Steel Droid 3.0.
I'm having the same problems with both speakers, was a problem on my d2g also. There has to be some kind of software fix that can be cooked up unless the hardware is just limited to what it is now.
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I use volume + and it works well. Good for those times when then train gets too loud and I can't hear my entourage episodes haha
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