| Business | Phone |
| Audio America 4481 Ontario Mills Pkwy, Ontario 91764 | (909) 476-7171 |
| Bose Corp 1 Mills Cir # 1010, Ontario 91764 | (909) 481-1014 |
| E & R Car Stereos 11075 S Central Ave, Ontario 91762 | (909) 517-3397 |
| La Sound Usa 2919 E Philadelphia St, Ontario 91761 | (909) 673-0188 |
| O B Audio 716 S Euclid Ave, Ontario 91762 | (909) 984-8585 |
| Trintiny Sound Co 1620 S Carlos Ave, Ontario 91761 | (909) 923-6640 |
| Yim's Stereo 7407 E Riverside Dr, Ontario 91761 | (909) 986-8483 |