I've written about this building before since it was once "that building that looks like a car radio" and make the "Sounds Real Good!" commercial.
I'm not sure if Cash-N-Dash was the immediate next tenant in the building after Continental Sound, but I think they were. Sadly, they un-radioized the building though you can still see signs of the old design (the stars were the knobs, and the windows were the radio tuner readouts, I think).
I'm not exactly sure when this place closed shop, but I'm pretty sure they dashed sometime this summer.