not bad for the money. not great by any means but look at the price tag and figure it out. At medium volumes you get a nice bump and it's a great addition but it can not take a beating if your favorite song comes on. I paired with a 5 channel 1600 w amp and 4 Kenwood 8 Inch 300 Watt Powersports/Marine Boat White Speakers | KFC-2053MRW and this is easily ten times better than my stock pontoon system was. but that's not saying that much. I spent $150 on the sub and Kenwood 8" were $180 for 4 of them. $330 for all 5 speakers is only going to get you so far so if that's your budget then this is a good choice. I wish I would have spent more, but I'm kind of a dick about tunes. If your not you will be happy.

I can turn the volume all the way up. This Subwoofer hits hard!