MTX Audio RFL Series 4000W RMS Reference Amplifier - RFL4001DThe MTX RFL4001D mono block amplifier a monster of clean power. It is at the cutting edge of technology and performance. With more than 4000W RMS in class D (very high efficiency), it pushes the limits of amplification. To achieve this, we spent three years in development to bring together the best in high fidelity and in high output. We also used the best components available. The power supply is cut by the most efficient MOSFETs available from the