Maxxsonics Usa $. $2284.89 2 x 2000W @ 4? /2 x 3500 W @ 2 ? / 2 x 5000 W @ 1 ? 1 x 7000 W @ 4 ? / 1 x 10,000 W @ 2 ? World record holders and SPL competitors the world over, know the Hifonics Generation XXV amplifier series.