Every product from JSL Speakers is 100% quality tested before it is packaged and shipped. Each product is guaranteed and supported with a 1 year warranty. All components are electronically tested for rub and buzz issues.     

   JSL speaker also perform a set of measurements on every component to ensure that their frequency response and electrical impedance fall within established tolerance windows. Each cone loudspeaker is additionally tested using a low frequency, high-voltage acoustical sweep to check for vibrations or noises (rub and buzz).