Why do US Amps MD1D say Mono 1ch but they have 2+ and 2- speaker inputs?
http://cgi.ebay.com/NEW-US-AMPS-MERLIN-MD1D-MD-1DN-1200w-MONO-CAR-AMPLIFIER_W0QQitemZ220390776540QQcmdZViewItemQQimsxZ20090406?IMSfp=TL090406153007r7687
http://cgi.ebay.com/NEW-US-AMPS-MERLIN-MD1D-MD-1DN-1200w-MONO-CAR-AMPLIFIER_W0QQitemZ220390776540QQcmdZViewItemQQimsxZ20090406?IMSfp=TL090406153007r7687