RCF L10750YK Subwoofer - Set of 1 6 Channel Electronic Crossover The 6XS does it all. Sharp 24 dB/octave Linkwitz-Riley alignment crossover with remote level control for the bass. Auto mode input switching Automatically configures the 6XS for two, four or six channels of input with up to eight channels of output. Includes bass management with the Programmable