MCINTOSH MA 252

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 Ω speakers or 160 Watts per channel into 4 Ω 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.



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