+1 as usual to Atmasphere for an eloquent explanation.
@kokakolia, with respect, I think you are conflating/confusing perceived loudness and frequency range. A speaker with limited frequency range will often be perceived to be louder than a full range speaker especially if it's frequency response is ragged. A downside of speakers with limited bass response is that they are often driven harder in an attempt to get some bass impact, which then results in them being played too loud and showing up deficiencies elsewhere in the speaker.