array(34) {
  [0]=>
  string(3) "AER"
  [1]=>
  string(5) "AMPEG"
  [2]=>
  string(7) "ARBITER"
  [3]=>
  string(9) "BLACKSTAR"
  [4]=>
  string(4) "BOSS"
  [5]=>
  string(6) "DUNLOP"
  [6]=>
  string(7) "DV MARK"
  [7]=>
  string(16) "ELECTRO HARMONIX"
  [8]=>
  string(4) "ENGL"
  [9]=>
  string(3) "EVH"
  [10]=>
  string(6) "FENDER"
  [11]=>
  string(7) "FISHMAN"
  [12]=>
  string(13) "FRACTAL AUDIO"
  [13]=>
  string(6) "HIWATT"
  [14]=>
  string(16) "HUGHES & KETTNER"
  [15]=>
  string(6) "IBANEZ"
  [16]=>
  string(3) "JMI"
  [17]=>
  string(6) "KEMPER"
  [18]=>
  string(6) "LINE 6"
  [19]=>
  string(5) "LINE6"
  [20]=>
  string(8) "MARSHALL"
  [21]=>
  string(9) "MATCHLESS"
  [22]=>
  string(11) "MESA BOOGIE"
  [23]=>
  string(3) "MXR"
  [24]=>
  string(6) "ORANGE"
  [25]=>
  string(6) "PEAVEY"
  [26]=>
  string(5) "PROCO"
  [27]=>
  string(6) "RADIAL"
  [28]=>
  string(6) "ROLAND"
  [29]=>
  string(3) "RTX"
  [30]=>
  string(5) "SUPRO"
  [31]=>
  string(3) "SWR"
  [32]=>
  string(7) "TECH 21"
  [33]=>
  string(3) "VOX"
}