230 Mike wrote:
So, we're still talking about cutting more holes. It'd be nice if someone made a piggyback unit of some kind.
I think no hole cutting will be required as both use the same SS faceplate. True, the 519 calls for two 2.5" holes 1.5" apart, and the dual calls for two 2.25" holes 1.75" apart, but the press in nuts are aligned with the 10-24 thru bolts from the faceplate, so it should all be a wash. The difference in hole 'height', and the need to clean up the area between the holes is to accomodate mounting (read dropping in) the single horn from the outside. The dual can avoid the larger diameter holes and clean up between, because they are mounted from the inside of the hull. I don't know if your 230H has the access through the anchor locker that my 200H has.

I took the horn pics I posted from that rectangular hole. That may be the area where some discreet cutting could be needed. Come to think of it, I'm not even sure the cutout I have in my anchor locker will be big enough. Could be some brainstorming will be required here. Maybe assemble the horns to the u bracket reaching through the hull from the outside, connect the wires, 4200 the horn bracket into place, then secure by mounting the faceplate. I dunno.