Subwoofer abc box8/3/2023 ![]() That is why we have been dividing up the tuning in such systems by the ABC method for over 25 years. Do you think then that a one-size-fits-all tuning solution makes sense? Not me. Do you think the same acoustical conditions are found on the first 30 rows on the floor of an arena as the last 30 in the upper deck? This is absurd. By custody I mean: these speakers are assigned to these seats, and these ones are assigned to these seats.ģ) Unique areas require unique tuning. Does it make sense to you to tune the top boxes that are pointed into the balcony with a mic down on the floor? Not to me – which does not mean I have not seen it done.Ģ) Once we define custody areas for the room we can proceed with tuning to make the areas match. The following items still hold true in either case:ġ) We need to define the target coverage area for every element in the array. What is the big difference between tuning a 12 element coupled point-source array that has boxes spread horizontally and vertically (we call those “point-source systems” or “conventional systems” or “old systems”) and a 12 element point-source array that is only a single box wide and is spread vertically (we call these “line arrays”)? The difference is that the “line array” has a lot more slices of vertical coverage, and a lot fewer slices of horizontal coverage. The first step is to remove from the table the idea that new physics have been invented, and that new rules apply. So how about we cover it in three paragraphs in a blog? No problem. I would also not have spent two years writing a book to get to the same answer. If it were a simple matter, then I would not waste 3.5 days working up the physics of speaker and room interaction to set up the answer to this very important question. ![]() An example of a line array tuning using thr ABC method described below – with 19 SIM data screens and some photographs can be found here.Įvery time I teach a seminar it is simply a matter of time before the question arises: How do I tune a line array? Typically it takes less than 10 minutes of the 4 day seminar to elapse before this comes up. ![]()
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