Secondhand As New Lexicon MX400 Dual Reverb/Delay Processor - Part # LEXMX400VLexicon MX400 Dual Stereo Multi Effects Processor Used but As New. Item No. LEXMX400V EU. Preloved, as new, Lexicon MX400 dual stereo multi effects unit. This item was used for approximately 3 months for a band that I accepted a mixing job with but subsequently split up. It would have done no more than 10 gigs. Plug in programming and recall with the power of Lexicon hardware. You want the rich, luscious sound thats defined studio reverb for three