| Business | Phone |
| Just Audio & Alarms Inc 1443 W 6th St # 103, Corona 92882 | (951) 340-1605 |
| U S Car Stereo 1787 Pomona Rd, Corona 92880 | (951) 340-9822 |
| Sound Accent 80 W Grand Blvd, Corona 92882 | (951) 582-0720 |
| Zarb Electronics 1750 California Ave # 117, Corona 92881 | (951) 279-0485 |