Before live concerts, guitarists do not stand around, shooting the breeze, but instead spend their valuable time adjusting a tuner to ensure their instruments achieve optimal sound quality. Since the advent of electric rock and roll, the primary feature consumers look for involves the capability of a guitar tuner to prevent distortion and feedback. Then, guitarists focus on using the device to perfect the sound of every note played on acoustic, slide, and 12-string guitars. A stereo tuner ensures the sound quality emanating from a stereo receiver reaches optimal pitch and clarity. Such tuning modules, ideally constructed by the same manufacturer, allow users to hone in on a distant FM radio station and narrow the frequency range from where the station emits radio signals. To enhance all the sound quality in your life, go online to eBay and search for reliable sellers who may even offer vintage tuners from the 1950s and 1960s.