EZ Ski Boat Upgrades:
Wakeboard Tower Speakers and Subwoofers by: Earmark Car Audio
Click on any of the pictures below to see a larger version.

The system shown was installed in a 2002 Sea Ray 220 Bow Rider. The factory stereo features a Clarion marine CD player that operates four Clarion 6 1/2 inch dual cone speakers.

Earmark added a pair of rear-firing enclosure speakers to the tower for the benefit of wakeboarders. These speakers are mounted via matching white powder-coated brackets which are attached with all stainless steel hardware and neoprene gaskets. The speaker cables run through the center of the tower rails. Chassis grommets are used at each pass-thru. A service loop is provided and a watertight deck plug allows removal so the tower can fold away for storage.
The tower speakers are run by an amplifier mounted under the glove compartment.  An amplifier mounting board is made of water-resistant birch, clad in matching marine-grade carpet and mounted via stainless steel hardware.  
A Bazooka 8-inch powered subwoofer is also mounted under the port side glove compartment. The two aluminum ring brackets provide a secure mount that will stand up to the shock and vibration of a choppy day. The wakeboard amplifier and powered subwoofer are totally out of sight.
Within the glove compartment and next to the CD player, we installed a subwoofer level control and an on/off switch for the tower speakers
This particular upgrade package is very affordable and extremely popular among ski boat owners because we are using everything the boat is originally equipped with.
Earmark Car Audio