Intended for serious personal studios and professional music-production environments, the PreSonus Eris Pro Sub 10 lets you take charge of the low-frequency foundation of your mix. An ideal companion to Eris Pro and Eris Studioseries reference monitors, the Eris Pro Sub 10 compliments full-range monitors without overshadowing them and extends the reach of your fullrange system's low end with a more musical and natural approach. Extensive user controls include input gain, continuously variable lowpass filter for creating a seamless crossover transition, and a switchable highpass filter that removes content below 80 Hz from the full-range signal sent to the monitors.