This manual covers the McIntosh MX-110, an Audio Preamplifier and Tuner designed for high-fidelity audio reproduction. As a Hi-Fi Component from its original production run, the MX-110 is engineered for exceptional audio quality and reliable performance. It features a stereo preamplifier with an integrated AM/FM tuner, offering multiple selectable inputs and tone controls to tailor your listening experience. The device operates on 105-127V AC power, with an option for 210-250V AC with a transformer change, and has a power consumption of 25 watts. Its vacuum tube complement includes 12AX7 (x2), 12AU7 (x4), 6FQ7 (x2), and 6X4 (x1).

The purpose of this Original Service Manual is to provide comprehensive technical information for the maintenance and repair of the McIntosh MX-110. It includes detailed sections on chassis and electrical systems, complete wiring diagrams, numerous illustrations and schematics, and essential technical data. This manual is designed to assist owners, technicians, and service professionals in understanding the unit's internal workings, performing routine maintenance such as cabinet and internal cleaning, and executing tube replacements and electrical checks. It is the most complete service documentation available for this model, presented in English.