Mark Levinson introduced its new No.523 stereo preamplifier ($15,000) at CES 2017. Todd Eichenbaum, who designed the No.523, explained that it offers many of features found in the company’s No.52 preamplifier ($30,000). However, compared to that reference preamp, the No.523 is an all-new design. It features six line-level inputs, a phono preamplifier, and a headphone amplifier (there’s a 1/4″ jack on the preamp’s front panel). The No.523 is identical in every way to Levinson’s No.526 preamplifier ($20,000), apart from lacking that unit’s internal DAC.