Tube preamplifier and power amplifier
A vacuum-tube preamplifier and power amplifier share one chassis, combining source selection, vacuum-tube preamplification, and power amplification in one fully analog component.
Start with your room, speakers, sources, phono cartridge, and future system plans. Pearl Audio can help determine whether the MA2375 is the right center for the system. Call (503) 222-2599 or use our contact form to request an audition.
Pearl Audio’s Take
McIntosh’s first vacuum-tube integrated amplifier in more than a decade brings a fully analog vacuum-tube preamplifier and power amplifier together in one component. The MA2375 combines 75 watts per channel with configurable phono playback, analog tonal adjustment, and practical paths for expanding an analog system.
A vacuum-tube preamplifier and power amplifier share one chassis, combining source selection, vacuum-tube preamplification, and power amplification in one fully analog component.
McIntosh Unity Coupled Circuit Output Transformers deliver the rated output through dedicated 4-, 8-, and 16-ohm speaker connections.
Support for moving-magnet, low-output moving-coil, and high-output moving-coil cartridges includes adjustable capacitance, resistance, and gain.
A five-band analog equalizer joins full-range stereo preamplifier and mono subwoofer outputs for flexible system planning.
Audio: Instrumental music; there is no spoken narration.
The video presents the MA2375 and its illuminated vacuum tubes, controls, connections, and McIntosh Watt Meters. On-screen feature cards identify it as McIntosh’s first vacuum-tube integrated amplifier in more than a decade and highlight the five-band analog equalizer, Unity Coupled outputs for 4-, 8-, and 16-ohm speakers, KT88 output tubes, analog inputs, mono subwoofer output, 75 watts per channel, configurable moving-magnet and moving-coil phono input, Power Guard SGS®, Sentry Monitor™, and Power Control.
The official McIntosh overview above presents the MA2375’s controls and construction. These verified details explain how its analog architecture supports source selection, tonal adjustment, system integration, and private listening.
The circuit uses four KT88 output tubes, four 12AT7 driver tubes, two 12AX7A preamplifier tubes, and two additional 12AT7 preamplifier tubes. A polished stainless-steel chassis frames the illuminated tubes and blue McIntosh Watt Meters.
The MA2375 supports moving-magnet, low-output moving-coil, and high-output moving-coil cartridges. Adjustable capacitance, resistance, and gain let the phono stage be configured around the cartridge.
A five-band analog equalizer provides optional tonal adjustment at 30 Hz, 125 Hz, 500 Hz, 2 kHz, and 10 kHz. Two Watt Meters display left- and right-channel output in watts and decibels.
Full-range stereo preamplifier and mono subwoofer outputs provide expansion paths. Data Ports, RS232, Home Theater PassThru, Power Control, and the included remote support broader system operation.
Power Guard SGS® and Sentry Monitor™ protection technologies monitor operation. The High Drive headphone amplifier includes Headphone Crossfeed Director (HXD®).
The MA2375 weighs 93 lb (42.2 kg) net. Its packaged dimensions are 25.25 × 23.25 × 14.5 in (64.1 × 59.1 × 36.8 cm), and its packaged weight is 103 lb (46.7 kg). McIntosh products may be ordered by phone or email for pickup at Pearl Audio, or Pearl Audio can provide local delivery and installation within the Portland, Oregon service area. They are not available for carrier delivery to customer addresses. Plan stable support, suitable access for connections, and ventilation in accordance with the owner’s manual.