Source: Press Release, Last Accessed: 2017/11/01

The MA252 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 loudspeakers or 160 Watts per channel into 4 Ohm loudspeakers. The amplifier features 2 unbalanced, 1 balanced and 1 Moving Magnet phono input. All 4 inputs can be given user-friendly names to simplify user control. Bass and treble tone controls help fine tune the music to one’s personal preferences. A full range subwoofer output is included for use with a powered subwoofer to further enhance low frequencies.
The MA252 features McIntosh's 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. Thanks to its solid-state output, the MA252 is the manufacturer's first product containing vacuum tubes to include the patented Power Guard technology which monitors the output signal for signs of over-driving and makes real time micro adjustments to the input signal to prevent harsh sounding clipping.
Other McIntosh technologies found in the MA252 include Sentry Monitor (a protective circuit for accidental shorts in speaker wires), 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.

For more information: http://www.mcintoshlabs.com/

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