Equipment Mods & Repair

  • Curcio Audio Engineering - High end audio kits and products. Preamps, Power Amps, Tube Digital Processor. Dynaco Repair, Restoration, & Modification Center.  Vacuum tube repair & restoration.  Home of The Dynaco Doctor. 
  • Deltronics Pro Audio Repair - Chicago's premier service center, providing expert repair work for consumers, musicians and audio/video professionals. Expertise includes repair/restoration of vintage audio equipment.
  • eXemplar audio - A company that build tube electronics, offers modification services to upgrade and enhance virtually any tube audio equipment, does custom designs and is the factory authorized agent for assembly of all Bottlehead products.