767 Broadway Ave., Seaside

394-1700, www.kartunes.com

So the new iPhone upgrade was complicated enough with all the accessories and apps and info plans without figuring out how to sync its 2,400 contacts with the car stereo Bluetooth. Thank heavens there’s a long-time husband-wife-led team of stereo techies over in Seaside standing accessible, friendly and ready to remedy headaches—or blow out ear drums—with their range of sound and security solutions, and without the big box anonymity. Each system—and these guys can get you whatever Viper or Nav-TV toy you need—can be tested in house, standing on the checkerboard floor. Just as crucial: Any installations can be made, or hiccups resolved, right there on Broadway too.