For those that arnt aware, Bi-amped means the one speaker takes in two signals. Usualy one signal for the low frequences, and another for the mid's and highs. This results (due to genraly more power to the speaker) in cleaner/louder sound. But its also dependant on how much power is being put to it.
In theory, if these little speakers are in fact, bi-amped, they should sound alot better than if they were not, but this could also mean it sucks up more battery power.
Previous Phone - Startrek (or 3125); HTC Touch Pro 2
Current phone - Samsung Galaxy Nexus
ROM: Jelly Bean 4.2.2 - Stock