Our walk-in soundproofing store is located at 455 EAST CARMEL ST, SAN MARCOS, CA. 92078 -- Open 8-5 Weekdays. Saturdays 'till Noon! Location Map & Street View. Nearby Airports: San Diego, Palomar (Carlsbad), (Coaster, too!) Oceanside, Fallbrook, Temecula (Rancho California: French Valley). Call for pickup! (888) 942-7723 Se Hable Espanol!