Yes, everyone hates the way HB rates their cone angle, but in this case he is comparing two HB's against themselves.
That article provided some very good info on cone angle, transducer construction, how they work, etc but most of it was focused on transducer specs, which I haven't seen in sub-$1000 consumer units. Quality Factor (Q), Trasmitting Voltage Response, and Receiving Voltage Response, and subsequent graphs might be provided on request. Don't know, but you would also need to know the test environment to make sure you are comparing apples to apples. Marketing always creates the best looking graphs.
The future units that will be able to adjust frequency sound very interesting and can see where it may have some benefits. Most fisherman that would spend the time to work with all that adjustment are very serious about their sport. Most recreational fisherman don't even use their current finders to the best of their ability. How many times have you seen people with the fish symbols on and sensitivity set at default?
My point was that he will not be getting a broadband transducer with a unit in the price range he is currently looking. I also don't think he needs to worry about such features in that price range and for a beginning fisherman.
FWIW, I did enjoy reading the article. Q and the discussion on ringing and response brought me back to my loudspeaker design obsession days.
