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MA2375 Vacuum Tube Integrated Amplifier

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McIntosh MA2375: Fully Analog, Fully Integrated

The McIntosh MA2375 is a fully analog vacuum-tube integrated amplifier and McIntosh’s first vacuum-tube integrated amplifier in more than a decade. It brings a vacuum-tube preamplifier and power amplifier together in one component, delivering 75 watts per channel through McIntosh Unity Coupled Circuit Output Transformers. Dedicated 4-, 8-, and 16-ohm speaker connections make the rated output available across those specified loads.

The MA2375 is equipped to serve as the analog center of a carefully planned stereo system. Two balanced and three unbalanced line inputs accommodate multiple sources, while the configurable phono input supports moving-magnet, low-output moving-coil, and high-output moving-coil cartridges with adjustable capacitance, resistance, and gain. A five-band analog equalizer provides tonal adjustment at 30 Hz, 125 Hz, 500 Hz, 2 kHz, and 10 kHz. Twin McIntosh Watt Meters display left- and right-channel output in watts and decibels.

Key Features

  • Vacuum-tube architecture: Four KT88 output tubes, four 12AT7 driver tubes, two 12AX7A preamplifier tubes, and two additional 12AT7 preamplifier tubes.
  • System expansion: Full-range stereo preamplifier and full-range mono subwoofer outputs.
  • Protection and control: Power Guard SGS®, Sentry Monitor™, Power Control, Data Ports, RS232, Home Theater PassThru, and an included remote control.
  • Private listening: A High Drive headphone amplifier with Headphone Crossfeed Director (HXD®).
  • McIntosh construction: A polished stainless-steel chassis, visible tube illumination, and blue McIntosh Watt Meters.

The MA2375 combines source control, configurable vinyl playback, tonal adjustment, speaker power, and system-expansion connections without adding digital conversion to its fully analog architecture. Pearl Audio can help you evaluate speaker connections, configure the phono input around your cartridge, and plan the MA2375 within a complete music system.

Schedule an audition or speak with Pearl Audio about the MA2375: sales@pearlaudio.com · (503) 222-2599.

Pearl Audio’s Take

Fully analog, fully integrated

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.

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.

75 watts through Unity Coupled outputs

McIntosh Unity Coupled Circuit Output Transformers deliver the rated output through dedicated 4-, 8-, and 16-ohm speaker connections.

Configure phono playback

Support for moving-magnet, low-output moving-coil, and high-output moving-coil cartridges includes adjustable capacitance, resistance, and gain.

Shape and extend the system

A five-band analog equalizer joins full-range stereo preamplifier and mono subwoofer outputs for flexible system planning.

Experience the McIntosh MA2375

Video text alternative

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.

Inside the MA2375

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.

Tube architecture, made visible

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.

Configure the phono input

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.

Useful control in the analog path

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.

Ready for a larger system

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.

Protection and private listening

Power Guard SGS® and Sentry Monitor™ protection technologies monitor operation. The High Drive headphone amplifier includes Headphone Crossfeed Director (HXD®).

Verified specifications
  • Architecture: Fully analog vacuum-tube integrated amplifier
  • Rated output: 75 watts per channel
  • Speaker connections: 4, 8, and 16 ohms
  • Line inputs: Two balanced and three unbalanced
  • Phono input: Moving magnet, low-output moving coil, and high-output moving coil, with adjustable capacitance, resistance, and gain
  • Outputs: Full-range stereo preamplifier and full-range mono subwoofer
  • Equalizer: Five-band analog: 30 Hz, 125 Hz, 500 Hz, 2 kHz, and 10 kHz
  • Control: Data Ports, RS232, Home Theater PassThru, Power Control, and included remote
Purchase Options: In-Store Pickup & Portland-Area Installation

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.

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