Unlike other attempts at bass synthesis, the 120A’s patented subharmonic synthesis process produces smooth,musical low frequencies that don’t interfere with mid- or high-band information– even at maximum levels. The result is unmatched low-end punch at levels that won’t destroy your system. In fact, the 120A is optimized to allow audio professionals to get the most out of their high-performance, low frequency speaker systems, and includes both a subwoofer output (with its own level control) and main outputs that can be configured as either full-range (including synthesis) or high frequency-only.