Quote Originally Posted by minnowtime View Post
Will the Humminbird 688ci HD DI unit work on the 598ci Hd SI transducer? Thanks
Two modes will work without any problems:

1. 2D at 200kHz
2. DI at 455 kHz, but actually it will be the Right SI view in vertical format.

I had already used compact SI transducer on DI unit, and I also partly used DI transducer and compact SI transducer on one DI unit, and do not see any reason for bad working of SI transducer piezo’s on DI unit, and vice versa:

http://www.crappie.com/crappie/side-...ml#post2427705

http://www.crappie.com/crappie/side-...enting-16.html