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#11510719 - 03/30/16 08:57 AM 899 transducer
forsanmedic Offline
Pro Angler

Registered: 03/13/11
Posts: 586
Loc: south DFW
I have read a lot about people going to the hdsi transducer. I just saw a youtube video showing the mounting of both the compact transducer that they called high speed, and the hdsi transducer. They showed mounting the hdsi transducer more flush with the bottom of the boat, so it wouldn't throw a rooster tail on plane. My question is would it be to my advantage to run both? I understand that I would need to use a Y cable. Btw, I have an aluminum G3 deep v boat.
My unit is almost 2 years old, so trading with humminbird not really an option.
_________________________

G3 V172
USMC 86-91
Realtor, United Realty and Associates
www.stacyallshomes.com
http://www.homesforheroes.com/affiliate/orvi-alls

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#11510994 - 03/30/16 10:40 AM Re: 899 transducer [Re: forsanmedic]
Wayne P. Offline
TFF Team Angler

Registered: 11/16/10
Posts: 3591
Loc: Charlottesville, Va
Originally Posted By: forsanmedic
I have read a lot about people going to the hdsi transducer. I just saw a youtube video showing the mounting of both the compact transducer that they called high speed, and the hdsi transducer. They showed mounting the hdsi transducer more flush with the bottom of the boat, so it wouldn't throw a rooster tail on plane. My question is would it be to my advantage to run both? I understand that I would need to use a Y cable. Btw, I have an aluminum G3 deep v boat.
My unit is almost 2 years old, so trading with humminbird not really an option.


"high speed" is the transom dual beam transducer XNT 9 20 T. There is a non-temp sensor model XNT 9 20 that is used with another transducer and Y cable.

The idea of doing that with a metal hull is to put the more expensive SI transducer above the hull bottom for impact protection and sacrificing the cheaper dual beam transducer in case of impact. Also the smaller transducer may provide better high speed performance due to less water contact.
The Y cable is the AS SIDB Y.

The transducer that comes with the 899ci HD SI Combo is the XNT 9 SI 180 T and has the exact same mount as the XNT 9 20. There is a roostertail plug included with that mount.
The HDSI is constructed different and does not create a roostertail like the XNT mount does. It will still create some if not mounted correctly. Read the installation instructions.
_________________________
Humminbird Helix 12 CHIRP SI, 1198c SI, 1198c SI, ONIX 10 SI NT, Helix 7 CHIRP SI GPS G2, SOLIX 12 SI, 360, RC-1

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