The Mark Levinson® № 523 preamplifier is a six-input dual-monaural preamplifier featuring Pure Path circuit design, class-A Pure Phono stage, and configurable balanced, unbalanced, and class-A Main Drive Headphone outputs.

Specifications and Features:

• Analog Inputs: 2 balanced (XLR), 3 single-ended (RCA) line, 1 single-ended (RCA) phono w/ ground.
• Analog Outputs: 1 balanced (XLR); 1 pair single-ended (RCA), 1 headphone (¼”, 6.3mm TS).
• Output Impedance: <80Ω single ended, <160Ω balanced.
• Dimensions: Height (with feet): 3.75”/ Height(without feet): 3.25” x 17.25”W x 18”D (10.2cm/8.9cm x 43.8cm x 45.7cm).