im not sure of how to describe the difference in the two(455/800). ive been using humminbird si/di for a few years now and for me, ive decided to just keep my unit on 455. the pictures that im showing on this post are all 455. using a humminbird 998. ill dig up some pictures using the 800 and post them next.(the 2d is 200khz)![]()


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