The model 2Q is Equi=Tech’s flagship rack mounted balanced power system, delivering virtually 99% quiet, uninterrupted performance. The 2Q simply cleans up and coming power to give your system the purest, most distortion-free result possible. The model 2R provides equally unparalleled sound quality and outcome, however, the 2RQ doesn’t include enhanced features and upgraded components such as switches, digital readout, and the patented LoNo technology contained within the 2Q transformer which additionally produces an extraordinarily silent environmental output. Differences aside, both rack systems are maintenance-free, bullet-proof, and well worth the investment.