The MA252 Integrated Amplifier is the first hybrid integrated amplifier from McIntosh. Taking retro design cues from the legendary McIntosh MC275 Vacuum Tube Amplifier, the MA252 combines the best of vacuum tube and solid state circuit design to create an amplifier that’s both visually and sonically stunning.

The preamplifier stage uses two 12AX7a and two 12AT7 vacuum tubes housed inside stylish protective cages; the output stage is a direct coupled solid state amplifier that delivers 100 Watts per channel into 8 Ohm speakers or 160 Watts per channel into 4 Ohm speakers. An all analog design, it comes with 2 unbalanced, 1 balanced and 1 Moving Magnet phono input for turntables. All 4 inputs can be given user-friendly names in order to simplify user control. Bass and treble tone controls help fine tune your music to your personal preferences. A full range subwoofer output is included for use with a powered subwoofer to further enhance low frequencies.

ELECTRONIC SPECIFICATIONS

• Power Output per Channel

  100 Watts into 8 Ohms
  160 Watts into 4 Ohms

• Number of Channels

  2

• Speaker Impedance

  4 or 8 Ohms

• Rated Power Band

  20Hz to 20kHz

• Total Harmonic Distortion

  0.03%

• Dynamic Headroom

  1.8dB

• Frequency Response +0,-0.5dB

  20Hz to 20kHz

• Frequency Response, +0, -3dB

  10Hz to 100kHz

• Sensitivity Phono (Moving Coil)

  N/A

• Sensitivity Phono (Moving Magnet)

  3.0mV

• Sensitivity High Level (Balanced / Unbalanced)

  0.6V/0.3V

• Sensitivity (Power Amp input)

  N/A

• Signal To Noise Ratio (Moving Coil)

  N/A

• Signal To Noise Ratio (Moving Magnet)

  80dB

• Signal To Noise Ratio (High Level)

  97dB

• Signal To Noise Ratio (Power Amp input)

  N/A

• Input Impedance (Balanced / Unbalanced)

  20K/20K

• Damping Factor

  8 Ohms: >200
  4 Ohms: >100

• Maximum Output (Balanced / Unbalanced)

  8V Unbalanced

CONNECTIVITY

• Balanced Input

  1

• Unbalanced Input

  2

• Phono Input Moving Coil

  0

• Phono Input Moving Magnet

  1 (fixed loading)

• Upgradeable Digital Audio Module

  No

• Digital Coaxial Input

  0

• Digital Optical Input

  0

• Digital MCT (DIN) Input

  0

• Digital USB Input

  0

• HDMI (ARC) Input

  0

• Balanced Variable Output

  0

• Unbalanced Fixed Output

  0

• Unbalanced Variable Output

  0

• Headphone Output

  1/4" High Drive

• Subwoofer Output

  1 (mono)

• AM/FM Tuner option

  No

• Home Theater PassThru

  No

• Unbalanced Analog Connector Type

  Standard

• Speaker Binding Post Type

  Standard

• Service Port

  0

DIGITAL AUDIO SPECIFICATIONS

• Digital-to-Analog Converter (DAC) Type

  N/A

• Digital Coaxial Input Sample Rate

  N/A

• Digital Optical Input Sample Rate

  N/A

• Digital MCT (DIN) Input Sample Rate

  N/A

• Digital USB Input Sample Rate

  N/A

CONTROL

• Tone Controls

  Bass and Treble

• Tone Bypass and Input Assign

  Yes

• RS232 Control Input

  No

• Power Control Output

  1

• Rear Panel Data Port

  1

• Rear Panel IR Sensor Input

  No

• Input Level Match

  Yes

GENERAL SPECIFICATIONS

• Vacuum Tube or Solid State

  Preamplifier: Vacuum Tube
  Power Amplifier: Solid State

• Output Type

  Direct Coupled

• Output Meters

  No

• Dual Layer Chassis

  Yes

• Chassis Finish

  Polished stainless steel

• McIntosh Monogrammed Heatsinks™

  Yes

• Power Requirement

  120V 50/60Hz, 3.7A

• Standby Power Requirement

  <0.5 Watts

WEIGHTS & DIMENSIONS

• Dimensions (W x H x D)

  12" (30.5cm) x 7-5/8" (19.4cm) x 18" (45.7cm)

• Weight

  28 lbs (12.7 kg)

• Shipping Weight

  37 lbs (16.8 kg)