Diago Posted April 22, 2015 Share Posted April 22, 2015 Just got the 899 with side imaging. I also got the two transducers. How far apart should I mount the transducers.Thanks for the adviseJim Quote Link to comment Share on other sites More sharing options...
BartmanMN Posted April 22, 2015 Share Posted April 22, 2015 Why do you have two? You only need the XNT 9 SI 180 T, unless you are T'ing it off an running the same unit off a ducer up front too. Quote Link to comment Share on other sites More sharing options...
Diago Posted April 22, 2015 Author Share Posted April 22, 2015 I was told I need the side imaging one that will read up to 10mph and the other one for reading the depth at high speeds Quote Link to comment Share on other sites More sharing options...
BartmanMN Posted April 22, 2015 Share Posted April 22, 2015 I'm not sure what model your other transducer is, but I've never heard of that explanation about one for high speed.This link shows the difference in the cone angle/frequency range between the XNT and XHS High Def models.http://www.humminbird.com/Category/Support/FAQ/HDSIvsCompactSI/ Quote Link to comment Share on other sites More sharing options...
Diago Posted April 22, 2015 Author Share Posted April 22, 2015 Bartman,Do you have the 899 with side imaging? Can you run at high speeds and still get a bottom reading?Jim Quote Link to comment Share on other sites More sharing options...
thatoneguy Posted April 22, 2015 Share Posted April 22, 2015 With many boats, you don't get a good reading of the bottom with the 'Bird SI units when on plane. You can add a second 'ducer mounted separately and connected with a Y cable to work around that - I'm guessing that's what diago is referring to here. Quote Link to comment Share on other sites More sharing options...
h8go4s Posted April 23, 2015 Share Posted April 23, 2015 With many boats, you don't get a good reading of the bottom with the 'Bird SI units when on plane. You can add a second 'ducer mounted separately and connected with a Y cable to work around that - I'm guessing that's what diago is referring to here. Exactly. It all depends on the boat and the transducer location. On my Alumacrft Classic 165, I can get good readings at my top speed of 29 mph. I've seen posts of good results up to 40 mph also. Stepped transoms are somewhat problematic, and lots of sparkly glass boats need a separate 2d transducer for high speed readings. The Y-cable uses the 2d signal from the 2d transducer and the SI signal from the SI transducer. It doesn't matter how far apart they are. Quote Link to comment Share on other sites More sharing options...
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