MA252 2-Channel Integrated Amplifier

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.

The MA252 features our McIntosh Monogrammed Heatsinks™ which are connected to advanced high current output transistors. These transistors eliminate the typical amplifier warm-up time so that the MA252 is in peak operating condition from the moment it’s turned on. A powerful control microprocessor is used for smooth system operation, along with some of the latest audio-grade circuit components that deliver the best possible sound.

Thanks to its solid state output, the MA252 is our first product containing vacuum tubes to include our patented Power Guard® technology. Power Guard monitors the output signal for signs of overdriving and makes real time micro adjustments to the input signal to prevent harsh sounding clipping that could potentially damage your speakers. If Power Guard is activated, the 2 vacuum tubes connected to the affected audio channel(s) will flash an amber color; they will return to their normal green color when the clipping has stopped.

Other McIntosh technologies found in the MA252 include Sentry Monitor™, High Drive headphone amplifier and gold-plated speaker binding posts. Input selection, bass, treble, tone bypass, balance and input offset levels can be adjusted using the front panel knobs or the included remote control; all settings and input selection will be shown on the OLED display. The entire unit sits atop a beautiful polished stainless steel chassis with a classic McIntosh-styled die cast aluminum name badge attached to each side. Contact your local dealer​ to learn more.
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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

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 Autoformer

No

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)

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