1. A/D/S (Pre-ADST)
2. American Bass
3. Ample Audio (Amplifiers)
4. Arc Audio
5. Ascendant Audio
6. Audax
7. Audiocontrol
8. Audison
9. Bose
10. Brax/Helix
11. Butler Audio
12. Cerwin Vega
13. Coustic
14. Diablo Audio Technologies (Extinct)
15. Diamond Audio
16. Digital Designs (DD)
17. DLS
18. DynAudio
19. Eclipse
20. Focal
21. Harrison Labs
22. Hertz
23. Hifonics
24. Hybrid Audio
25. Image Dynamics (ID)
26. Infinity
27. JL Audio
28. KEF Kar components
29. Kicker
30. Luxman
31. MB Quart
32. McIntosh Laboratories
33. Memphis Audio
34. MMATS
35. Morel
36. Orion
37. Precision Power (PPI)
38. Rainbow
39. Resonant Engineering (RE)
40. Revolution Design Audio (RD)/DB Dynamics
41. Rockford Fosgate
42. ScanSpeak
43. SEAS
44. Sinfoni
45. Sundown Audio
46. Treo
47. TRU Technology
48. Vifa
49. Xtant
50. Zapco
Good Brands
51. Alphard Audio
52. Alpine
53. Altec Lansing (Vintage)
54. Alumapro
55. Audio Development
56. Audiomobile
57. Autotek
58. Avionixx
59. Blitz
60. Boston Acoustics
61. Bravox
62. Cadence
63. CD Technologies (CDT)
64. Clarion (head units)
65. Crossfire
66. Crystal
67. Directed Electronics
68. Earthquake
69. Eton
70. Elevation Audio
71. Fusion
72. Genesis
73. Illusion
74. JBL (amplifiers)
75. JVC Digifine
76. Lunar
77. Maxxsonics
78. Mclaren Audio
79. MTX
80. Naim Audio
81. Panasonic (Headunits)
82. Phoenix Gold (older 1990s amplifiers, subwoofers)
83. Pioneer (subwoofers)
84. Planet Audio
85. Polk Audio
86. Powerbass
87. PRV Audio
88. Soundstream (older pre-Power Acoustik amplifiers)
89. Synergy audio
90. US Acoustics
Mediocre Brands
91. Aiwa
92. Alphasonik
93. Ampere Audio
94. Audio Legion
95. Audiobahn
96. Audiobank
97. Bang & Olufsen
98. Bazooka
99. Blackmore Mobile Electronics
100. Blaupunkt (Bosch)
101. Boss Audio
102. Crescendo audio
103. Crunch
104. D’Amore Engineering
105. DS18
106. Dual
107. Elemental Designs (eD)
108. Eonon
109. Harmon-Kardon
110. Infinity (reference components)
111. Kenwood (head units)
112. Lanzar
113. Lexicon
114. LG
115. Lightning Audio
116. Mark Levinson
117. Matsui (DAB)
118. Metra Electronics
119. NVX Audio
120. Onyx Mobile Audio (Harman/Kardon)
121. Panasonic (subs and amps)
122. Phoenix Gold
123. Pioneer (amplifiers)
124. Power Acoustik
125. Samsung
126. Sanyo
127. SAS Bazooka (bass tubes)
128. Soundstream
129. Taramps
130. Vibe
Stay Away From:
131. American HiFi
132. American Pro
133. Audiovox (VOXX Electronics)
134. Becker (Harman International)
135. DHD
136. Electrovoice
137. JDL
138. Jensen
139. Kenwood
140. Kingwood
141. Kole
142. Kraco
143. Kronik
144. LA Sound
145. Legacy
146. MA Audio
147. Macaudio
148. Magnat
149. Massive Audio
150. Optimus
151. Phase Linear
152. Profile (Leon Speakers)
153. Pyle
154. Pyramid
155. Rockwood
156. SAS Bazooka
157. Sherwood
158. Sony
159. Sound Storm
160. Sparkomatic (Altec Lansing)
161. SPL Audio
162. Thump (owned by Mackie)
163. Ultimate Sounds
164. Volfenhag