The shape of a DML speaker panel can significantly impact its sound quality and performance. Here are some key points on how shape affects DML speakers:
- Rectangular panels with an aspect ratio around 1.6:1 (golden ratio) tend to have the smoothest frequency response. Square panels can have more peaks and nulls[1][2].
- Rounded edges help minimize edge diffraction effects that can cause response peaks at high frequencies[3][4].
- Curved or circular panel shapes distribute and smooth resonance modes more evenly compared to rectangles[4].
- Trapezoidal, triangular, and other tapered shapes can help widen horizontal dispersion at high frequencies[2][5].
- Vertical orientation causes more uneven horizontal dispersion due to narrowing width. Landscape orientation provides smoother coverage[5].
- Irregular non-rectangular shapes can further break up repetitive resonance patterns, but make response less predictable[2].
- Panel size in both dimensions affects the frequency range and limits bass extension without a subwoofer[1][3].
- Panels segmented into smaller sections allow tailoring the shape and response of different frequency bands[4].
In summary, rectangular panels with rounded edges, golden ratio dimensions, and landscape orientation tend to provide the smoothest and most well-behaved frequency response. But shape can be used creatively to manipulate a DML speaker’s sound radiation.
Citations:
[1] https://www.diyaudio.com/community/threads/a-study-of-dmls-as-a-full-range-speaker.272576/
[2] https://dmlspeakers.com/articles/Does%20Size%20Really%20Matter
[3] https://dmlspeakers.com/articles/101%20-%20Introduction%20to%20Distributed%20Mode%20Loudspeakers
[4] https://www.reddit.com/r/diysound/comments/o6sr9t/diy_dml_panel_speaker_shape/
[5] https://www.spoke-sound.com/technology
[6] https://youtube.com/watch?v=Lk95g2lIB7A