John Haupt has been offering professional service to all of his clients, handling the audio and hearing needs of the Chula Vista area since 1971. We also accept Medi-Cal. Open M- F 9am-4pm-Sat, Sun, Appointments Only Hearing Testing - Hearing Aids - Sales - Repairs & Rentals - Insurance Discounts - Medi-Cal & Most Insurance Accepted - We Offer The Newest Technology & Lowest Prices.