Customer came in with a 1994 Kona Boat. He has a 454 engine and wanted his speakers to scream and be able to be heard with his engine is running. We have a whole section set up here just for marine audio equipment. The customer picked out a Kenwood Marine deck, the KMR-D558BT. For the speakers he went with the Marine Kicker speakers 41KM604W and a Kicker 4 channel amplifier the 12CX300.4 to push more power to the speakers. After everything was all said and done the customer was very happy with the results and will be recommending others. These marine speakers were professionally installed by the tech crew at Audio Express 4501 E. Broadway, Tucson, AZ 85711 (520) 327-6349 your car audio experts. We can recommend and install some marine speakers to fit your boat and budget.