Mb Quart ZA1-1500.1 1500W Monoblock Z-Line Series Class SQ A/B Amplifier RMS Power Rating: 4 ohms: 500 watts x 1 chan. / 2 ohms: 1000 watts x 1 chan. / 1 ohm: 1500 watts x 1 chan. Wired remote bass level control included Fluid-FETS hand selected insulated MOSFETS Focused mass heat sink designs Q-Stasis preamp stage with wide input range