On sale! (normally $759) The Swan H10 is a one-way vented active 10" subwoofer finished in an ebony veneer covered by piano lacquer, giving a profound and full texture. The electronic circuit design of each unit is both modern and innovative. The H10SUB active subwoofer is the core feature of the H Systems. This speaker comes with a built-in high-pass / low-pass filter. The filter crossover point is 80Hz. It can transmit multi-channel input signals above 80Hz to each satellite and send signals below 80Hz to the built-in subwoofer amplifier. This ensures accurate signal division while maintaining acoustic integrity.