page_title: Double bass array
section_title: Array layout
hierarchical_section_title: Double bass array / Design / Array layout
caption_attribution_description: English: Original and mirror sources forming a plane wave. Deutsch: Original- und Spiegelquellen, die eine ebene Wellenfront erzeugen.
context_page_description: A double bass array is a specific layout of subwoofers within a rectangular listening space. It removes unwanted room related resonances over a wide listening area.
context_section_description: Modes between side walls, floor and ceiling are suppressed by arranging the subwoofer in a specific grid:
  : Wall width
  : Wall height
  : Horizontal distance from wall ( for n=0 in picture)
  : Vertical distance from wall ( for n=0 in picture)
  : Number of subwoofers horizontally
  : Number of subwoofers vertically
  Counter 
  With this specific grid layout reflections from the walls act as mirror sources. Interference of the subwoofers and mirror sources create a plane wave up to a certain frequency. The more sources the higher the frequency. This cutoff frequency  can be calculated for each dimension as follows:
  : Speed of sound
  : Distance between subwoofers
  Example: A 2 × 2 array on a wall measuring 4 × 3 m would work up to 86Hz horizontally  and up to 114Hz vertically .
caption: Top view of an array with 2 subwoofer. The walls create mirror sources which results in a plane wave.
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