Need an ignition interlock device near San Diego? Intoxalock is available at Sound Check Systems, a certified Intoxalock ignition interlock installer. We can install your breathalyzer in cars, trucks, vans and other vehicles.Sound Check Systemsis a locally owned and operated car audio and window tinting shop with more than 12 years' experience. From car stereos, DVD players, car alarms and remote starts to window tinting, fog lightsand Nextel cell phones, our shop features it all. We have been installing ignition interlock devices for Intoxalock since 2009.