| A&R Cambridge Ltd |
| Abbingdon Music Research |
| Joe Akroyd |
| Advanced Music Systems |
| Armstrong Audio |
| Ashdown Engineering |
| Audient |
| Audio Partnership |
| Audiolab |
| Audiotonix |
| Birmingham Sound Reproducers |
| Blackstar Amplification |
| Bowers & Wilkins |
| Brenell Engineering |
| British Homophone |
| Bush (brand) |
| Cadac Electronics |
| Cambridge Audio |
| Carlsbro |
| Castle (company) |
| Celestion |
| Cheetah Marketing |
| Collaro |
| Columbia Graphophone Company |
| Creek Audio |
| Dansette |
| DiGiCo |
| E.M.G. Hand-Made Gramophones |
| Epos Ltd |
| FeONIC |
| Focusrite |
| Funktion-One |
| Garrard Engineering and Manufacturing Company |
| Goldring (audio company) |
| Gramophone Company |
| Hayden (electronics company) |
| Helios Electronics |
| HH Electronics |
| Hiwatt |
| International Audio Group |
| Jennings Musical Instruments |
| KEF |
| Klark Teknik |
| Laney Amplification |
| LEAK |
| Marshall Amplification |
| Matamp |
| Meridian Audio |
| Midas Consoles |
| Monitor Audio |
| Mordaunt-Short |
| MTR Professional Audio |
| Musical Fidelity |
| Neve Electronics |
| Rupert Neve |
| Orange Amps |
| Pink Triangle (audio manufacturer) |
| PMC Ltd. |
| ProAc |
| Quad Electroacoustics |
| Radford Electronics |
| Raindirk Audio |
| Rega Research |
| Reslosound |
| Roksan |
| ROXi |
| SME Limited |
| Solid State Logic |
| Soundcraft |
| Soundscape Digital Technology |
| Spendor |
| Studiomaster |
| Sugden Audio |
| Tannoy |
| Trace Elliot |
| Vox (company) |
| Watkins Electric Music |
| Wharfedale (company) |
| Wilson Benesch |