Power Amplifier PA1.3 is special design for subwoofer. It is perfect to drive the subwoofer of double 18 inch. The power of PA1.3 is 2 x 1300W @ 8 ohms stereo, and it is 2 x 2000W @ 4 ohms stereo. PA1.3 adopts the world famous brand Toshiba transistors. There are 32 pcs Toshiba transistor for each channel. This amplifier is very solid, even in long-time tour and rough environment.