20 DXS12 D-XSUB BOOST D-XSUB OFF D-XSUB XTENDED LF 0 -10 -20 -30 20 DXS15 D-XSUB BOOST D-XSUB OFF D-XSUB XTENDED LF 10 RESPONSE (dB) 10 RESPONSE (dB) 20 0 -10 -20 50 100 500 FREQUENCY (Hz) 1k 2k -30 20 50 100 500 FREQUENCY (Hz) 1k 2k