Really, really loud!

[AndyCR512]

I'm not sure where to turn, and whether I have a bad device or bad ROM version or what.

I have a Sprint Touch Pro, and the volume on it with headphones is loud. Really loud. Loud enough that I can hear the sound from the headphones connected through the included adapter from a ways away - at 1% volume. Since the rocker switch goes up at 20% increments, this means that a simple bump of the switch results in eardrum shredding. Luckily the included headset is somewhat less loud - 10% is OK and 20% is tolerable, but anything higher is again earsplitting. Why on earth is it so loud? What can I do?

Thanks!