Thanks for the info. Since we purchased the boat at the boat show they were running several "included" upgrades in the purchase price of the boat. Amp is a Kicker DX series but not sure which model and speakers are Roswell R6 Classic. I've been told by the dealership if I go with a 10" subwoofer I will also need to upgrade to a larger amp, which makes sense but all of this stereo, speaker, amp, subwoofer is like another language to me. Ha