The CHIRP+ also narrowly beats the Pro+ when mapping deeper water. The use of detailed mode is recommended for most cases. A comparison of detailed (left) and basic (right) smart imaging modes on the CHIRP+. In comparison, the Pro+ will not produce an image in depths of less than 50cm (a ‘too shallow’ warning will display on screen). The CHIRP+ will automatically switch (if necessary) to the wide beam setting, providing great shallow water accuracy in depths as little as 15cm. However, because of how SONAR works, you are unable to use the high CHIRP frequency in very shallow water less than 1.8m (6ft). Because this beam is more ‘focused’ and targeted, it allows you to see a massive amount of detail at pretty much all depths. For example, unlike its predecessor, the CHIRP+ offers a very narrow beam angle of 7° (high CHIRP). Other advantages of the CHIRP+ over the Pro+Īside from more advanced SONAR technology, the CHIRP+ also offers a number of other technical improvements over its little brother, the Pro+. With upgraded technology, the CHIRP+ provides far superior detail of underwater structure than the Pro+ This means you can find features and fish more easily and more efficiently, as well as gain a better understanding of the lake, river or sea bed. In addition to greater overall resolution, the CHIRP+ will produce images with better target separation, better deep-water penetration and decreased clutter (‘noise’) in a faster time than the Pro+. Without getting too technical, CHIRP simply results in a much clearer, more detailed image of fish, structures, features, weed beds or the bottom compared to non-CHIRP units. Deeper’s CHIRP+ is the world’s first castable, GPS-enabled, Wi-Fi echo sounder to utilises this CHIRP technology. So, for example, the high CHIRP setting, which ranges from 635 to 715kHz in frequency on the CHIRP+, will produce one pulse at 635kHz followed by one at 636kHz and so on, all the way to 715kHz before starting over again. ![]() However, the CHIRP+ – which stands for Compressed High- Intensity Radiated Pulse – emits a continuous flow of pulses ranging from low to high frequencies in a given beam (cone angle). The Pro+ uses more conventional dual beam SONAR, which transmits fixed sound wave frequencies of either 290kHz (high/narrow beam, better for detail and deeper water) or 90kHz (wide/low beam, better for larger areas and shallower water). ![]() The key difference between the Deeper Pro+ and CHIRP+ models is in the transducer used and how many, and how often, ultra-sound pulses are sent out into the water column. *Unless you have already done so, we highly recommend to read our Pro+ review first for more information on the basics of using Deeper’s castable echo sounders Is the CHIRP+ actually any better or more useful than the Pro+, when should you pick on over the other and should you part with your hard-earned cash to get one? We tested it over a number of weeks to find out… ![]() Inevitably, most anglers want to know what exactly the main differences are between these two castable echo sounders from the Lithuanian company. Following on from our recent review of the Pro+ from Deeper, we now turn our attentions to the latest version, the CHIRP+, which was launched in early 2019.
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