Coustic's S series amplifiers manage to look ultra-cool while delivering super-efficient bass power. With the high mass extruded aluminum heat sink set off by a curved heat shield with carbon fiber finish, this S series is not an amp for the shy or timid. Coustic also knows that while looking good is one thing, sounding good is whole different ball game. The S series is designed using the latest Surface Mount Device (SMD) technology for high efficiency and rock-solid power. This means that the S series will continue to deliver clean power even in low impedance loads. Coustic also uses a patented, state-of-the-art power supply for ultimate sound quality and reliability. A built-in 12 dB / octave high-pass or low-pass crossover and variable bass boost allows you to fine-tune the ultimate system. Adding on to a factory sound system? You're going to love the speaker level inputs with Coustic's unique Intelli-Sense automatic turn-on. A soft-start turn-on and muted turn-off eliminates those annoying pops when turn