Has anyone used them? In their add on page 118 of the Jan. Powerboat mag they say"Comply with local and state regulation. WE GUARANTEE IT." I didn't find anything about a guarantee on their website though.
http://www.ggb.ca/
The site states 88db@5'. California just instituted that level @39".

Anybody have any experience with them?

I talked with Graham of GGB today and their product looks very interesting. Hasn't anyone tried these yet. They claim less power loss than the HPI's and show dyno tests on their web sight. GO4BROKE thanks for the link.

John B

Ordered a set of transom mount today
from Graham at GGB and will have some results in three to four weeks or so.
Great looking as well. I'll keep you posted.

Greg

GO4BROKE, we did offer a Gaurantee back in early 03, as we could meet or exceed the noise reg's that were in place at that time. Unfortunately right after making the Gaurantee public, New, tougher noise reg's were introduced in some area's which made it pretty much useless. For this reason it is no more.
Sorry.