Originally Posted by mike837go
Googling "Outdoor speakers" would be a good start.
You'll have to remove the old ones and read the specs on the back for the impedance of the old ones. The new ones will have to be the same (4 or 8 Ohms, usually).
Then find speakers with the same or higher wattage rating.
X2, also you can get them at a Best Buy like store or even Amazon. Key is to know the size and resistance (Ohms).
On my 23B I can see the back side of one of the speakers from the kitchen cabinet, just have to be on your hands and knees, just need a flashlight to read the label. I bet a camera aimed up there will give you the whole speaker spec.