ric wrote:
Yep usually the mounting holes NEVER line up. Hold speaker in hole, mark new holes with a sharpie, take out speaker and drill new pilot holes. If you're going in vinyl covered wood and not finished gelcoat fiberglass just screw it in, no pre drilling needed.
Thanks for the replies guys. I am really not concerned about the actual process of marking and drilling, but rather the proximity to where the original holes are. For some reason, the 6.5" clarions have two sets of mounting holes very close together. It looks like the polk speakers will align with the outer holes. This would mean I would have to drill holes about 1/4" from the original holes. I'm drilling into a piece of plastic that houses cup holders and the speakers under the gunwale. Ideally I would like to rotate everything 45 degrees and drill new mounting holes that are not so close to the originals, but the Polk trademark on the tweeter will be rotated too. Up front, I will be drilling into gel coated fiberglass with the same proximity issue. Didn't know if any of you guys ran into that or not. Here is a pic of the original speaker showing the two mounting locations.