I have a high quality sound system (very high end) and the sounds of vehicles are not only too loud, but have too much mid-range bass. I can watch or listen to any dvd, music and other games without issues (even at rather loud volumes), but in arma 2 and now arma 3 sound levels and eq gains on vehicles are just far too harsh and literally cause speakers to vibrate noisily under the stress. I must emphasise having a 720W RMS sound system with high-end speakers, I love things loud, but vehicle sounds are not only too loud but have such harsh eq adjustments that it's really a concern, ie too harsh, overly high levels of mid-range bass sounds. It may have to do with the actual recordings but as a musician also, I can say with surety I could myself do a better job of equalizing and normalising some of these sounds.