Charles Darwin generated a lot of controversy with his theory of evolution. Although his theories were well respected in the scientific community, they met with opposition from some in the general public. Sound Storm Laboratories" EVOLUTION is a series of stylish, efficient, high performing amplifiers that are as exciting and well respected as Darwin"s theory, but without all of the controversy. SSL EVOLUTION is loved by scientists and non-scientists alike. The high power output of the two ohm stable EVOLUTION MOSFET monoblock amplifiers make EVOLUTION a natural selection for those wanting a BIG bass sound. The EV1500M, the1,500 watt version of EVOLUTION class AB monoblock, amplifier features a low pass crossover variable from 40Hz to 90Hz, a fixed (200Hz) high pass crossover, and Bass Boost variable from zero to +18dB. It also boasts a variable input gain control, power and protection (thermal, overload, and short circuit) LED indicators, and line and speaker level inputs. Other standard features on this model include chrome plated RCA connectors and screw terminals and a remote subwoofer level control knob. Frequency response is 9Hz to 50Hz (+/-3dB). For technical questions about this product please visit our website, soundstormlab.com, or call a technician at 888.38.STORM. Let us prove to you that when it comes to building an impressive and affordable home-quality theater in your vehicle, Sound Storm is your mobile entertainment solution…and everything else is just noise.