| Business | Phone |
| Stew Dodge Sound 2343 N Portland Blvd, Portland 97217 | (503) 286-1085 |
| Spectrum Acoustics 3511 Se Belmont St, Portland 97214 | (503) 232-1373 |
| Pdx Audio Po Box 92065, Portland 97292 | (503) 284-2727 |
| Horne Audio Inc 1837 Se 21st Ave, Portland 97214 | (503) 239-1981 |