The SWA-400 subwoofer amplifier delivers clean, solid power required to drive medium to large sized subwoofer speakers. Its compact 1U design is compatible with many other popular electronic devices and different styles of multimedia gear. The SWA-400 is engineered to provide high fidelity bass amplification and is tailored for home audio and home theater audio systems. User defined presets give you complete control over crossover frequency, as well as slope, phase, and low-cut. Recall your presets for the type of listening you are doing. Short circuit and thermal protection circuits are built-in. While deep, hard hitting bass is fun and a little annoying to the neighbors, a good subwoofer system also improves your main speaker's fidelity. By driving a separate subwoofer system, your left and right speakers are free to articulate dialog and subtle audio accents while the explosions are hitting you in the chest. This subwoofer amp is an ideal match to our passive in-wall subwoofers. The SWA-400 is stable down to 4 ohms, so it will easily drive one or two subs. The front panel backlit LCD screen will go dark after 2 minutes with no adjustments. Automated power management includes audio trigger and 12V triggers that will shut down and turn on the amp as you need it.