News via http://www.psp-hacks.com/2011/03/22/...-for-6-206-3x/

Crank it! Install and activate “boost.prx” to achieve a ~ 30% dB increase. To activate press Home + R-Trigger. Thanks neur0n! This prx (plugin) is compiled for 6.20 HEN and 6.3X custom firmwares.

Download Here