The hs-221 utilizes VUE’s revolutionary Active Compliance Management (ACM) technology to reset the size-to-performance benchmark for subwoofer systems. The combination of ACM technology and the hs-221’s highly-sophisticated on-board electronics result in massive amounts of pure, clean low-frequency energy from a dual 21-inch configuration that embodies a significantly smaller enclosure than other dual 21-inch designs.
VUE’s patent-pending ACM technology combines both band-pass and vented alignments into a single enclosure. The hs-221 places two high performance, 21-inch transducers into this configuration, with both woofers sharing a common vented chamber. One woofer’s frontal radiation is direct, while the second woofer’s frontal radiation drives the band-pass chamber.
The hs-221 places two high performance, 21-inch transducers into this configuration, with both woofers sharing a common vented chamber. One woofer’s frontal radiation is direct, while the second woofer’s frontal radiation drives the band-pass chamber.
To make the two ACM subsections combine acoustically we use sophisticated DSP to precisely align the phase arrivals of the front facing woofer, the common chamber vent, and output of the band-pass chamber vent. The powerful amplifier sends 1,000W of pure sine wave power (5,000W “burst” ) with a unique optimal signal to each woofer. The combination of 5,000 watts of burst power produces 143 dB SPL peak output in free field (149 dB SPL half space – ground plane environment).
The combination of ACM, precision-engineered transducers, and sophisticated electronics, allow the hs-221 to deliver very high output while providing flat response down to 27 Hz (in ELF mode). The hs-221’s enclosure has a more compact footprint than most dual 21-inch systems and even some dual 18- inch designs.