The Alesis M1 ACTIVE's internal active crossover and custom-designed dual amplifiers ensure a broad, extremely accurate frequency response with clear imaging. The amplifiers (a 75-watt woofer amp and 25-watt tweeter amp) along with 8th order high and low-pass electronic crossover filters provide superb audio reproduction. The M1 Active's woofer and tweeter were specifically designed for the most linear, low distortion response in powered monitoring applications. Its 6.5" woofer cone is formulated from non-woven carbon fiber. Priced as pair.