I have a few Depth Devil signal amps ready to go. I have sold several of these on the forums and those who have bought really love them. There is feedback i can find if anyone needs to see that the units do make a difference in finding those deeper weaker targets. The Depth Devil takes those weak signals that can easily be missed and will boost those signals so that they are easily heard. the amplification on these is super high and you will never have a need to use full amp. they are $45 each shipped free. Feel free to email with any questions.