A wired doorbell system has three components: a low-voltage (15- to 20-volt) transformer, a chime and a doorbell button. They are connected by 18- or 20-gauge low-voltage wires. Although it’s at low ...

We set up and tear down a lot of home theater and audio/video gear on a daily basis — everything from speakers and subwoofers to amplifiers, receivers, turntables, and everything in-between. And one ...