April 23, 2014 By Robert Arends San Diego’s East County is Music to Our Ears! Bet you didn’t know that three of the world’s most renowned musical instrument companies are headquartered in San Diego’s picturesque East County – in the cities of El Cajon and Spring Valley and small town of Mount Laguna. Share the San Diego Love:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on Reddit (Opens in new window)Click to email a link to a friend (Opens in new window)