Description

In excellent condition, no defects. Any photo or video by request. Delivery to any point on the planet. Mail me to clarify the shipping cost. ============================================= 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. This beautifully crafted integrated amplifier includes our Hybrid Drive™ technology that uses the best of vacuum tubes and solid state to produce the best sound performance. 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 over driving 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 FTC Power Output Rating 100 W Power Output per Channel 100 W into 8 ohms 160 W into 4 ohms Number of Channels 2 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 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 ====== 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 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 Unit Dimensions (W x H x D) 12" (30.5cm) x 7-5/8" (19.4cm) x 16-1/2" (41.9cm) Unit Weight 28 lbs (12.7 kg) Shipping Weight 37 lbs (16.8 kg) Service Port 0