| Business | Phone |
| Commercial Sound Supply Inc 712 Oak Park Ave, Des Moines 50313 | (515) 243-1946 |
| Rdt Sound & Engineering 3606 E Euclid Ave, Des Moines 50317 | (515) 266-7851 |
| Des Moines Audio Inc 2000 Se 6th St, Des Moines 50315 | (515) 244-4041 |
| Tri Point Audio Technologies 4215 Chamberlain Dr, Des Moines 50312 | (515) 255-9555 |