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Garmin Echo 300c Review

Garmin Echo 300c has an average rating of 3.5 out of 5 based on 10 user reviews.



Designed with absolute simplicity in mind, Garmin Echo 300c is one of the most perceptive and affordable fishfinders on the market. It features Garmin’s exclusive HD-ID tracking technology which allows you to see flawlessly through the water on a 3.5 inch sunlight readable color display.

The Echo 300c boasts a split-screen zoom and fish symbol identification which clearly separates fish from thermoclines and a real time display of fish passing through the transducer beam. AutoGain technology also minimizes clutter and maximizes targets with 300 watt transmit power, further highlighting its proficiency at such an affordable price.

Installation is also extremely straightforward, using the quick-release tilt mount and transform-mount transducer which are included. All necessary cables for supplying power are also provided. Mounting brackets, fixing clamps are part of the equipment and makes the installation a simple matter.

The price, the supreme features and quick installation makes the Echo 300c an obvious choice for the angler wishing to progress to the next level.

Garmin Echo 300c features:

• Garmin HD-ID™ technology
• Garmin Smooth Scaling™ technology
• Ultrascroll™ technology
• 300 watt transmit power
• Dual beam sonar featuring width up to 120 degrees
• 3.5” sunlight readable color display
• Tilt mount, transducer, trolling motor clamp and transom mount
• Split-screen zoom
• Fish Symbol identification
• Max depth: 1500 ft in fresh water; 600 ft in Salt water
• Water temperature sensor
• Water speed sensor
• Real time display of fish passing through transducer beam You can get a great deal on Garmin Echo 300c here.

 Garmin Echo 300cLowrance Elite-4x DSIHumminbird 345c DI
Screen Size3.5 in / 89 mm3.5 in / 89 mm3.5 in / 89 mm
Screen Resolution320 x 240 pixels320 x 240 pixels320 x 240 pixels
Display TypeQVGA, 256 colors256 colors256 colors
Imaging2DDown Imaging2D and Down Imaging
Transducer TypeTransom Mount/Trolling MotorTransom Mount/Trolling MotorTransom Mount/Trolling Motor
Transmit Power300W RMS
2400W Peak-To-Peak
350W RMS
2800W Peak-To-Peak
500W RMS
4000W Peak-To-Peak
Sonar Frequency200/77 kHz455/800 kHz200/455 kHz 2D
455/800 kHz Down Imaging
Maximum Depth1500 ft200 ft600 ft 2D
250 ft Down Imaging

User Reviews

Posted by NJFlatman

  • 4/5

I was shopping for a medium priced fishfinder and I got a perfect one for my needs – Garmin Echo 300c. It has all the features of higher dollar fish finders but the price is right especially with the discount from fishfinders.com. Installation of this fishfinder is extremely simple and takes only a few minutes. I’m still learning all the features but it has already made fishing easier, quicker and more enjoyable for me.

Posted by gonefishin

  • 5/5

The Garmin Echo 300c will help you rise to the next level by giving you an affordable device that meets high expectations. You will notice the user-friendly qualities of the device from the moment you begin installation. With a quick release tilt mount it will take only minutes to have the fishfinder and included transom-mount transducer installed and ready for action.

Garmin HD-ID technology puts the Echo 300c in a unique class of fishfinders that offer crystal clear results. View the contours of the bottom distinctly and know exactly when there is a drop-off or edge. Gain precise detail of all structures that could inhibit you. Most importantly, you can target and spot your fish clearly and accurately. You will not only know where to drop your line, but you will also be able to see your drop and anything surrounding it that could help or hinder your success.

You can view far beyond the area directly to the side and below the boat with the Echo 300c. With a 300w RMS power and a dual frequency transducer, this fishfinder has the capabilities to expand the detail and view an angler has access to beyond those ever used before. The dual beams on this device expand the viewing angle to a width of up to 120 degrees. You will also find amazing detail at depths of 1500ft in freshwater and 600ft in salt water.

All of the detail gathered by the Echo 300c is brought to you on the 3.5” screen. The 320 X 240 resolution display becomes an additional set of eyes that show you exactly what you need to see in the underwater world with precision. The Smooth Scaling technology will make sure that you can change water depth without losing the sonar history that you have gathered.

Posted by RD

  • 4/5

I’m very happy with the unit after using it for over month. Even though the screen on the smaller side, it is very readable even in sunlight. I’m getting accurate sonar returns even at high speeds. The fishfinder didn’t disappoint me even though it’s much cheaper than comparable models.

Posted by musky

  • 4/5

If you’re looking for a fishfinder that will give you the most bang for the buck, Garmin Echo 300c is what you’re looking for. I’ve used many fishfinders, some of them much more expensive, Echo outperforms them all. The only downside is the 3 inch screen.

Posted by CajunBasser

  • 5/5

I would highly recommend buying this fishfinder. After using Humminbird products for years and decided to switch to Garmin. It was a very good decision, Garmin 300c is a very capable sonar, much better than any Humminbird fisfinder in this price range.

Posted by Rudi Z

  • 5/5

There are several things I like about this fishfinder. The display has great contrast which makes it easily readable in outdoor setting (the resolution doesn’t matter for the readability aspect). Also, Garmin 300c is very accurate when it comes to locating fish, much better than other units I’ve used. Power usage is very low, so it’s a good choice a kayak setup. The price isn’t too high, you can’t get anything better for the money.

Posted by Jim M

  • 5/5

Bought this unit because of price. Wanted smaller screen to economize space at front of my boat. Was concerned smaller screen might be an issue.

Size turned out to be ideal for my application. Color and resolution of screen negated my concerns over size. Screen resolution is tremendous asset.

At the recommendation of some reviewers, including a BPS tech, I combined this unit on the bow with a Lowrance DSI 3.5 unit at steering position. I use the Lowrance to search structure and the Garmin to locate active fish.

First time I saw my line and lure and watched a wiper on the screen reorient to strike I knew this was a great purchase. Makes grayscale units seem like antiques.

Posted by Yak Angler

  • 1/5

This is was not a good purchase. It was showing depth of 50 feet when the actual depth was no more than 2 feet. It didn’t show any fish either, I returned it.

Posted by dewright

  • 1/5

The screen on this unit is so small I can’t really tell what I’m looking at. This unit might be good for a younger person with perfect eyesight, I need at least a five inch screen.

Posted by Ras Erasmus

  • 1/5

I bought a Garmin echo 300 after reading all the reviews..but after using it i was very disappointed with it..it does not show the even at a low speed and it keeps freezing over a depth of 50m..even standing still the garmin doesn’t show the fish..and if I go shallower than 1m it shows fish the whole screen full..i am very disappointed with this purchase..my Navman shows everything better even if its a very older model..

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