If you want to get the most out of your for 1000 wattage subwoofer, I will recommend you purchase an amplifier which can output 1000 watt RMS (Per Sub); for example, if two subwoofers of 1000 Watt (Power Rating) you contain like (RMS x2 = 2000 watt) a 2000 wattage amplifier requires as for one 1000 watt subwoofer > single 1000 wattage of amp.