What I was talking about was comb filtering not particularly lobing. Lobing can be considered a subset of comb filtering as it is commonly referred to with two drivers at the crossover frequency where both are reproducing the same frequency. The MTM configuration with 18 dB/octave slopes was designed to reduce that effect. Lobing often has two or more lobes that have different amplitudes and radiate in different directions. I am including an image of that.
With multiple drivers all passing the same frequency you get a different result with multiple peaks and dips in power output all in the same direction and amplitude. The response looks like the teeth of a comb. There is a photo of that also included.
Both cause problems but they are different in results.
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Two way speaker lobing.jpg [ 177.37 KiB | Viewed 17671 times ] |
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Speaker comb filtering.jpg [ 70.72 KiB | Viewed 17671 times ] |