I hope some folks don't get to anal about the mod and sound quality....This is not meant to make it sound like a set of reference speakers.....it's a phone if you want audiophile quality get another device.
If you're looking for a bit of clarity then this is a great help.
I considered drilling the rubberized case but decided against it because of all the small dust balls already inside the battery area none the less I'm happy with the results for such a simple mod. thanks for the idea whoever you are....!!!
C-man