Improve the Way Your HD2 Sounds with SRS WOWHD
For the audiophiles out there using the HD2 as their mobile media player, you can now improve and tweak the way music sounds on your Device using the new version of SRS WOWHD.
It’s been released and tested on the HTC HD2 and allows you to adjust and tweak 3DEffect, Boost Sound, Bass, Treble and save them to Presets.
Download and install the CAB to your Device. DO NOT ACCESS THE PROGRAM at this time but Soft reset and after the Restart, go to Settings, System, SRS WOWHD or simply from the Start Menu, SRS WOWHD.
(Source: XDA Developers)