Im going to be building a custom cabinet soon. Its going to look like a traffic light (my bands name is Green Means Go!). Im using 3 15" speakers, and its going to be powered by my Fender BXR200 head. A friend of mine suggested to have one output on the head to go a 4 ohm speaker, and the second output to power 2 8 ohm speakers. Will this work? Any suggestions on what type of wood to use? Any advice you can give would be great. Thanks.