Thanks.
This XNT 9 SI 180 T or XHS 9 HDSI 180 T?
The pic is XHS 9 HDSI 180 T ...
All HB SI xducers (except ONIX and ION) have identical pinouts...
The wire channels are the same for XNT 9 SI 180 T and XHS 9 HDSI 180 T ...
Only the sounder SI transmitter is different in each head unit (and the rectangular bar piezoes are longer in the XHS 9 HDSI 180 T) ...
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It is even possible to transmit 800kHz thru the XNT 9 SI 180 T ... It just won't give very good results at 800kHz ...
Rickie