Earcos Electronic Repair Service - Barberton, Ohio 44203, Earcos Electronic Repair Service - Barberton, Ohio 44203. Earcos Repair. E.A.R.CO.S. is a full service Electronic Musical Equipment repair company. We repair the following types of music equipment Recording Equipment, Lighting, Effect Processors, Computer Interfaces, Keyboards, Guitar & Bass Amps, Speaker Cabinets, DJ Equipment, Power Amps and Mixers.