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Simrad XSonic Chirp questions

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Old 05-15-2018, 05:27 PM
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Default Simrad XSonic Chirp questions

Upgrading to Simrad 12" evo 3 with Structure Scan.
Going with XSonic CHIRP transducer, thru hull.

XSonic stainless steel 175 w/20, 1 kw, 20 degree angle transducer, freq 130-210 khz, 25 degree constant beam width
--OR--
XSonic B275 LH W bronze, 25 degree beam, freq 42-65 and 150-250 khz.
Questions:
Which CHIRP transducer will pick up well in <30' (bait schools)?
Which one better for picking up bait when running under way?
We are wet central Florida/Gulf of Mexico, generally up to 150' depth. Annual keys trip takes us into deeper water.
Disclaimer: I am posting this for my husband...hope what I have relayed makes sense....
Thanks
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Old 05-16-2018, 08:23 AM
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Thank you for reaching out to us. I have a couple questions to make sure we get you the right transducer for your application.
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1) What kind of boat is this going on? Important for the mounting style of the transducer. Length of the boat, typical cruise speed, and engine mounting style is the main info we need.
2) What is the style of fishing you do the most of? Trolling, bottom fishing, or deep dropping? If all three which one or two of these is the most common?
3) Both the transducers you mentioned are awesome sounders for the correct application but neither will include structurescan imaging. Is this something you are looking for or is the main focus now just the Chirp traditional style sonar?
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Typically speaking the B265LH is a good option for the Gulf of Mexico where the primary fishing application is bottom fishing or deep dropping further out. Structurescan has been gaining popularity for the fishermen that stick to the shallower water down there being 180' or less bottom fishing. This is a huge aid for finding the cuts and valleys dug into the bottom surface as well as being able to pinpoint and interpret wrecks beneath the boat. The HW elements on the B175HW and B275LHW are a little more geared towards the trolling and chunking crowd with the wider cone angles incorporated in the transducer. Not to say it cannot perform if you are bottom fishing, but the Wider cone angle on the High frequencies will not give as crisp of bottom detail compared to the narrower cone angle on the standard High Chirp built into the B175H of B265LH.
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Let me know what info you have for the questions I posted above and we can get everything dialed in for you and hopefully the information posted below that gives you some insight on the general uses between the two transducers.
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Old 05-16-2018, 04:46 PM
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Chris - thanks so much - here are the answers:

1) What kind of boat is this going on? Important for the mounting style of the transducer. Length of the boat, typical cruise speed, and engine mounting style is the main info we need. 28’ center console, Bluewater, has Armstrong bracket with twin 300 outboards. Cruise speed **.
2) What is the style of fishing you do the most of? Trolling, bottom fishing, or deep dropping? If all three which one or two of these is the most common? Trolling and bottom fishing.
3) Both the transducers you mentioned are awesome sounders for the correct application but neither will include structurescan imaging. Is this something you are looking for or is the main focus now just the Chirp traditional style sonar? We are purchasing 3D Structure Scan module with dual thru hull transducers as well. Just not sure about best Chirp for our style of fishing/territory.
Currently have Airmar bronze thru hull 600 watt to 582L Furuno (from 2004) - It picks up bottom at all speeds. With new Chirp, better to have dual freq or single freq? Thank you!


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Old 05-16-2018, 04:50 PM
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Forgot to give cruising speed - 36 mph....
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Old 05-17-2018, 07:01 AM
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My main concern with adding a B265LH or similar style faring block transducer would be if the boat is kept on a lift or trailer a lot of times these larger fairing blocks interfere with bunks and rollers.

I would probably recommend the B265LH transducer for your area and application, but with the 2 of the structurescan 3D fairing blocks mounted down there I'm not sure how much usable area will be left for the B265LH. I think if your planning to add the structurescan 3D fairing blocks then I would probably lean more to the B175H in the existing location your bronze thru-hull is now. You will need to over drill the existing hole cutout to fit the B175H in the same spot as your existing likely B60 transducer. The B175H would be a great place to start for the bottom fishing in your area. To take full advantage of the dual channel chirp and help support the trolling side of what your doing an additional B175L would be a good choice for the second Chirp channel. This would essentially give you a B265LH outcome with a pair of single channel flush mount transducers with a lot lower profile than the B265LH fairing block.

For the mounting placement I would probably put the B175 transducers inside of the 3D structurescan fairing blocks and possibly a hair further forward to make sure there is no cavitation that can interfere from the 3D fairing blocks. The B175 transducers will also provide a better bottom hold mounted closer to center line as there is typically cleaner water there.

The transducer part numbers for this recommendation are as follows:
B175C-20-L-MM (B175L with mix and match end)
B175C-20-H-MM (B175H with mix and match end)
You will also want two of the MMC-9N mix and match adapter cables to connect both transducers to the back of your Evo3 unit.
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