2 curve more appropriate amplifications, it rolls pretty good! Well-rounded and enjoyable no unpleasant noise. Lowest it knocks it! Ideal for my mobile sound everywhere, no inconvenience so far! Sound up to 500 people, it does, beyond you need to refill. I advise them for their strength and acoustic felt. Good value for money, robustness. less is weight, it would be again, I will not repeat because of the inconvenience. Before have I had tried JBL but not strong enough nor efficient and more expensive.