Found some time on the weekend to finish off the audio tube.
Here is the amplifier I went with. It is compact and fairly powerful. I am very happy with the cost as well.
Amp mounted on the cut pieces of 2x6 and wiring started.
Amp mounted inside tube. Lots of room.
Second end of tube attached and all wiring finished. The hole you see is for the external volume control for the amp.
Underneath of tube where power wires exit. Rubber grommet was used and I used silicone to ensure no water would seep in.
Ready for paint. I used Valspar Plastic paint.
Tube painted and the center speaker mounted. You can see the external volume control and the fiberglass poly fill I used to give the speakers a better sound.
The final product. I hooked it up to give it a test run and this thing sounds GREAT!!! It far exceeds my expectations. I am very pleased with the outcome. The speaker grills match the color scheme on my ATV as well.
Once I have it mounted to my front rack, I will take a video and upload it to YouTube for those of you that want to hear what it sounds like. I am very pleased.