How much do wakeboard speakers generally cost?

It affects how high the wakeboard sits in the water.
wikipedia further explains:
there are three places to check wakeboard widths: tips and tails - those are generally the same - and in the middle. Narrower tips and tails sit lower and make the wakeboard turn more aggressively. Wider tips and tails allow for more surface tricks, and a better release for spins off the wake. However, the main variable that changes with the width of the middle of the wakeboard is the height that can be gained off the water - the wider the middle of the board, the higher it will sit in the water and the harder it will bounce off the wake.

The boat usually travels at a speed of 17-25 km/h.

Wakeboard towers are typically made from either stainless steel or aircraft grade aluminum tubing.

The main manufacturers of wakeboard speakers are: Aerial, Bose, Bazooka, Infinity, MTX Audio, Kicker, and JL Audio.

Wakeboard racks cost between $100-$650. For a complete list of tower racks for sale, check out this website: http://www.onlyinboards.com/AccessoryShop/Products/Racks/Wakeboard-Racks.aspx

wakeboard racks are used in order to carry the wakeboards on the wakeboard tower.

A wakeboard tower allows your boat to have more hang time, it can be used for extra space to put wakeboard equipment (ie. racks, speakers), and it can be served for support when walking around the boat.

to first get the wakeboarder up and out of the water, punch the throttle. once he is up, the drag is quickly reduced. then you should basically just play with speed and trim until you get the boat planing and get the wake as big as possible

Wakeboard towers cost between $700-$4,000. For a complete list of wakeboard towers, check out this website:

Best bet is to take your boat to a qualified Marine Audio dealer (generally not a boat repair shop or marina), or to a good quality Car audio store that is insured to work on boats (separete insurance usually).
When it comes to boats, you need lots of power and speakers.
First thing to do is make sure what you have is properly installed. Then determine what is "distorting" .. is it too much base, purely volume or what.
Most boats we do (wakeboard style and river boats) we do: 40-75 watts RMS per speaker 4-6 speakers in boat 1 10" or 12" sub with 200-300 watts RMS Tower speaker if requested with 75-125 Watts RMS per speaker