What bike is this?
That was brilliant thanksI think it must be his 2006 GL1800, he mentioned it in another thread.
If it is a 2006-10 model, the speaker grilles come off when you remove the whole meter panel. The forum has an article and a video showing how to do this:
http://www.goldwingfacts.com/1800meterpanel06on.htm
http://www.youtube.com/watch?v=ga3Aa2_Dlvs