The SPL ELITE 550.4DF is a compact, ultra-powerful, and ultra-efficient 4-channel amplifier that is stable at 1 Ohm per channel, which is rare for a 4-channel amp! With 4x550W RMS in 1 Ohm and high- and low-pass filters up to 6.000 Hz, this amplifier opens up doors for entirely new types of installations. Plus, the built-in filters allow you to connect heavy SPL tweeters to this amplifier without needing crossover filters.

This versatile amplifier features high and low-pass filters, making it easy to connect to connect midbass driver or subwoofers to the amplifier. The high-pass filter ranges from 15-6.000 Hz, making it perfect for SPL tweeters, while the low-pass filter ranges from 50-6.000 Hz, ensuring that subwoofers and midbass drivers will thrive just as well!