Hi. I gave the choice between two power amplifiers to operate my Ground Zero Plutonium Subwoofer. It has a double swing coil with 3000 watts Rms at 2×2 Ohm. Now I have the choice between 2 amplifiers: 1. Ground Zero GZPA 2.3000D 2500 Rms at 2 Ohm 300 € (used) 2. Bridge K2.04 2400 Rms at 2 Ohm (used) 400 € (used) My question has someone experience with one of the two stages or can one recommend that the performance has grown? Which is more recommended for quality, which More for power. What does it look like about power consumption. Have a 2nd battery on reserve and to switch to it. Thanks in advance for your tips and suggestions. MfG Marco