For high output speaker systems, PRV Audio's 12MB1000FT-4 midbass is an excellent option capable of amazing performance. A great new addition to the Forte Series, where more power handling and less distortion on mid low mid bass frequencies is the key. All this attention to detail in the 12MB1000FT-4 makes it one impressive driver. With 97.5 dB efficiency and 1000 watts of continuous program power (RMS), this mid bass is ideally suited for car audio systems, making it easier to match a car audio amplifier to only 2 or 4 speakers wired in parallel. Also, its smooth response from 70 to 3,200 Hz makes it perfect for 2 or 3-way designs.