The JBL Boombox 2 speaker has several buttons and lamps across its top and front panels, and one of these the Infinity button. Here, we explain the function of this (A.K.A PartyBoost) button, what it does, and how to use it. In short, this control lets you join from two to over a hundred PartyBoost … Continue reading JBL Boombox 2 Infinity Button Explained