Nokta Makro 15.5x14 IM40 Black Waterproof DD Search Coil (Impact)

I want to start off, I absolutely love my Nokta Impact. I would not trade it for anything. Well maybe an Anfibio, just because it is water proof. I am disappointed in this coil. I was expecting to get at least a little more depth out of it than the stock coil, I did not. I tried 5kHz, 14 kHz, 20kHz in the different search modes and nothing helped to get any more notable depth out of the Impact. I even took a quart jar that I have almost full of change to simulate a cache or a hoard, thinking maybe that would be what this coil was made for. Nothing, no difference. Maybe they made the stock coil so good that you do not need a bigger coil. Or maybe they made this coil just to cover more ground with each swing, if that is the case they did a great job. It will definitely do that. It is lightweight so you will be able to swing this all day if you want. I do not know. I really wanted more depth so I will be sending this back. I give it 2 stars for the size and how lightweight it is.