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  1. driver diameter & beaming frequencies
  2. bass, midrange & treble frequencies in octaves
  3. fundamental frequencies for bass guitar


Due to wavelength, acoustic output of drivers will become unpleasantly narrow in dispersion at frequencies related to diameter. Here's a table of various driver sizes and the frequencies where the pistonic movement of the driver becomes undeniably directional:

driver diameter & pistonic beaming frequencies

speaker diameterbeaming limit in Hz
18"903
15"1052
12"1335
10"1658
8"2105
6.5"2672
5"3316
4"4224
3"5381
2"6840
1"13680




bass, midrange, & treble frequencies in octaves

bassrange in Hz
sub bass31 to 62 (and lower)
mid bass62 to 125
upper bass125 to 250
midrange 
lower midrange250 to 500
mid midrange500 to 1K
upper midrange1K to 2K
treble 
lower treble2K to 4K
mid treble4K to 8K
upper treble8K to 16K (and higher)




fundamental frequencies for bass guitar

noteHz
C3130.81
B2123.47
A#2 / Bb2116.54
A2110.00
G#2 / Ab2103.83
G298.00
F#2 / Gb292.50
F287.31
E282.41
D#2 / Eb277.78
D273.42
C#2 / Db269.30
C265.41
B161.74
A#1 / Bb158.27
A155.00
G#1 / Ab151.91
G149.00
F#1 / Gb146.25
F143.65
E141.20
D#1 / Eb138.89
D136.71
C#1 / Db134.65
C132.70
B030.87
A#0 / Bb029.14
A027.50
G#0 / Ab025.95
G024.50
F#0 / Gb023.12

To get the frequency of a note an octave above any note shown, multiply by 2.

EXAMPLE: Going 12 frets up on the C3 string is one octave above, and that note is called C4. Since C3 is 130.81 Hz,

130.81 * 2 = 261.61 Hz for C4.

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