MTX Audio Thunder Series 1000W RMS Monoblock Amplifier - Thunder1000.1The MTX Audio THUNDER1000. 1 is designed to work with an assortment of subwoofers and is capable of delivering up to 1000 watts RMS in an incredibly small package. This wailin' amp features a high efficiency class D topology. This type of circuit is preferred for driving subwoofers due to its ability to minimise power loss to heat when you rock all night long. 600 watts RMS x 1 @ 2 ohm 1,000 watts RMS x 1 @ 1 ohm variable low pass filter (40 220 Hz,