While the XM 9 20 MSI T is compatible with the HELIX 9 SI MEGA + G3N ... :
The stock xducer for the HELIX 9 SI MEGA + G3N is the XM 9 HW MSI T (which has the Dual Spectrum Low Q 2d)
https://humminbird.johnsonoutdoors.c...130.1577845057
Rickie
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While the XM 9 20 MSI T is compatible with the HELIX 9 SI MEGA + G3N ... :
The stock xducer for the HELIX 9 SI MEGA + G3N is the XM 9 HW MSI T (which has the Dual Spectrum Low Q 2d)
https://humminbird.johnsonoutdoors.c...130.1577845057
Rickie
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