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XP 9 20 T, XM 9 20 MSI T xdcrs usable frequency range

Posted: Mon May 13, 2019 8:52 pm
by PaprHead
I have a Helix Chirp Mega SI G2N on the console of my boat with a Y cable connected XP 9 20 T transducer and XM 9 20 MSI T transducer. I would like to maximize the chirp spectrum settings on my unit but can't find out the usable frequency ranges for these transducers. I realize these aren't true chirp transducers but would like to cover as big a range as possible.

I contacted Humminbird support but couldn't get any information through the representative.

Thanks for any help you can give,