Humminbird 571 HD DI Review

500W, 200/455/800KHZ TRANSDUCER


The Humminbird 571 HD DI Down Imaging fishfinder takes powerful features, Down Imaging, 500 watts of power, and turns it into an affordable package that fits any budget.

A high-power and high-frequency means that this unit will show excellent picture quality for deep readings as well.

With a maximum depth of 500 feet at 200 kHz and 100 feet at 455 kHz, you can spot structure, baitfish, predatorfish and cover as if you were underwater! The grayscale display is a razor sharp 640×480 pixels so you can see a crystal clear image.

humminbird 571 hd di

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What if someone told you that you no longer had to interpret the blobs that you sounder showed you, take a guess as to what it was, and cast your line, hoping for a bite? What if now, you could actually “see” underwater as if you took a dive and had a look for yourself?

With Humminbird’s Down Imaging technology, you can do just that. Using a very high-frequency SONAR beam, Down Imaging sounders literally “draw” the underwater image on your screen.


With SwitchFire SONAR, switching between frequencies is just with the push of a button! Once you have found a good spot, you can switch over to a higher frequency to take an ever closer look.

If the water condition doesn’t work well for a particular frequency, just switch to another to get a better picture – all without even getting up from your seat or taking your hands off the wheel! You can also create customized views to show the data that you use most when fishing, and keep unnecessary readings off your screen for a clear image.


  • SwitchFire Sonar
  • HumminbirdPC
  • Upgradeable Internal Software – OPTIONAL
  • Split Screen Zoom
  • Large Digits View
  • Custom View Selections
  • Custom Digital Readout Selections
  • Selective Fish ID+
  • Real Time Sonar
  • Sonar Echo Enhancement
  • Triplog – OPTIONAL
  • X-Press. Menu System


  • Sonar Coverage: 16°, 28°,45° & 75° @ -10db’
  • Temperature: Included
  • Speed: Optional
  • Mount: Quick Disconnect
  • Power Input: 10-20VDC


  • 571 HD DI Fishfinder
  • Transom mount transducer
  • Mounting bracket
  • Installation hardware
  • Owner’s manual

From Amazon