Fish finder help

I don't know. Looking at the two they are different units. I'm not sure what the x means

FYI,
X means excludes GPS.
Elite / Mark-4 = FF+GPS
Elite / Mark-4x = FF only 

Also,
The standard unit has a round signal that gets wider as it goes deeper ... like a cone inverted

A DSI signal is very narrow side to side, but gets wider front to back as it goes deeper ... this creates a slice type image.

Because the DSI signal only shows a slice of the water column the image on the screen is more clear.
Drawback to DSI,
It takes a higher frequency (400-800hz) which has a more difficult time pushing through the water column. Usually only useful to a hundred feet or so.

A standard signal doesn't need such a high frequency (200khz) so it is capable of pushing through the water column easier. Usually usefully to depth of 500 feet or so.

FWIW,
If you were looking for a signal for really deep, a frequency of 50-80khz would be preferred. Usually usefully in saltwater applications.

Also,
Remember that with denser water (salt, alge, mud), your depth range will be reduced.

Hope this helps clear some issues about FF's

Sent from my phone cause I can

Thanks yakhopper for the useful information. That did clear up some things I did not know about. I probably will never fish salt water, at least not by my kayak.

Alright I pulled the trigger on an elite 4. I have to find a place now for the 12 v battery and charger, and a marine box to put the battery in. Maybe get otw next weekend and try it out

http://www.rammount.com/CatalogResults/PartDetails/tabid/63/partid/082065077045066045051049054045049056045084082065049045078066/Default.aspx

Has anyone else purchased this yet? Do they recommend this product. Wonder if any places close by sell this product or if ill end up having to order it online

If you have to order online hook1 has them and you get 15% ncka discount

Thanks for the info Mike. I will check it out. I want to see if headwaters has any first. I don't remember seeing any in their store

I was thinking of using one of those arms off the side of a Trident instead of the permanent "glue in" installation. I have a cheap HB now but may upgrade. I'll wait to see how yours comes out...

I think it's going to come out pretty sweet. That transducer arm will work great on my sliding rails. I'm excited to get everything and install it and get otw and catch some fish hiding in the deep

Still searching locally for a 12v battery and a sealed box for it. Might try sears tomorrow. Wish bass pro would have had everything. Fingers crossed for taking the kayak this weekend. Will post pictures of my setup after everything is installed

Still searching locally for a 12v battery and a sealed box for it. Might try sears tomorrow. Wish bass pro would have had everything. Fingers crossed for taking the kayak this weekend. Will post pictures of my setup after everything is installed

I use a Pelican 1120 box for all my kayaks. The battery can be found at  Batteries plus. They are fairly common where batteries are sold. Also you can get them where house alarms are sold.

There's a batteries plus store in Modesto

I work down in Modesto so ill have to check that out. Thanks for the info on the pelican 1120 box, I'll look into that. Thanks for all the useful info, I appreciate it

Best deal I found on the 1120 is on EBay. $27 and change shipped.

How would you rig it up with the wires? Pretty cool that you can drive a car on top of it without crushing it