Speakers
I had the same dilemma last year. I have a 2000 H340 with the stainless arch and wanted to add cockpit speakers. There are very few places to put flush mounted speakers in the cockpit. The only flat spot that I found was the helm station console below the table leaves, not a real good location. I had a H29.5 and located the speakers there, in order for the helmsman and anyone seated in the stern-perch seats to hear the music it had to be turned up fairly loud. Unfortunately anyone sitting in the cockpit, near the companionway got blasted, so I opted not to use that location on our H340.In the end I chose not to use flush mounted speakers. I mounted a pair of Poly-Plannar MA-840 subcompact box speakers on each side of the instrument hood. The MA-840's have low magnetic field and do not interfere with the depth, speed or wind instruments. While the MA-840's are small, they do have rather good sound. They surely don't sound as good as my home stereo but for the way I use them, they sound fine and I don't have to worry about blasting anybody out, because they are aimed towards the stern.The installiation was rather easy since I was able to remove the plastic instrument mounting board and back the mounting hardware with large washers after drilling holes in the fiberglass. To me its a clean installiation and the speakers don't interfere with anything.Good luck!