Mark Levinson No523 Dual-Mono Preamplifier

Mark Levinson No523 Dual-Mono Preamplifier 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. Features Pure Path discrete, direct coupled, fully balanced, dual-monaural signal path Discrete, balanced R-2R Ladder volume control for precision and performance Class-A Pure Phono stage with physically separated channels for MC and MM Class-A Main Drive Headphone output for up to 32-Ohm headphones using main circuit Six analog line-level and phono inputs; balanced, single-ended, and headphone outputs Selectable fourth-order, 80 Hz high-pass filter allows seamless integration of subwoofers Designed and handcrafted in the USA Specifications Line stage gain: 13.5 dB balanced, 7.5 dB single-ended  Input impedance: >45 kΩ Output impedance: <80 Ω single-ended, <160 Ω balanced Maximum input level, normal gain setting: >10 V RMS, single-ended, >15 V RMS, balanced Maximum output level: >11 V RMS single-ended, >22 V RMS balanced Headphone output impedance: selectable, <3 Ω or 75 Ω Infrasonic filter: Defeatable, 15 Hz, 2nd order (12 dB/octave) Moving magnet mode Input resistance: 47 kΩ Input capacitance: Selectable; 50, 100, 150, 200, or 680 pF Gain: 40 dB @ 1 kHz Moving coil mode Input resistance: selectable; 20, 33, 50, 66, 100, 200, 330, 500, 1000, or 47 kΩ Input capacitance: 50 pF Gain: Selectable; 50, 60, or 70 dB @ 1 kHz 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) Control connectors: Ethernet (RJ45), RS-232 (RJ12), Trigger In and Out, IR In, USB-A, Mini USB Dimensions (HWD): 3.75" x 17.25" x 18" Weight: 39 lb