Change bass loudness on the JBL Xtreme 2, by turning on and off its low frequency mode (LFM). When ON, LFM makes the passive bass radiators vibrate much more. So this adds a low rumble quality to the playing program, that travels pretty far from the speaker. JBL Xtreme 2 Low Frequency Mode: Howe to … Continue reading JBL Xtreme 2 Low Frequency Mode