mark levinson 626 dual monaural forforstaerkerMark Levinson 626 dual monaural preamplifier The Mark Levinson 626 dual mono preamplifier delivers uncompromising sound quality with advanced digital processing and a fully balanced dual mono design that ensures maximum precision and exceptional realism in your music. At the heart of the 626 is Mark Levinson's own Pure Path design, which uses a directly coupled and fully balanced dual mono signal path along with a balanced R 2R ladder volume