Audio Database


McIntosh MA2275 945,000yen(including-tax. around the 2007 time)

Phone amplifier, a preamplifier, the tube integrated amplifier that adopted the thermionic tube as the whole page of power amplifier.

The main signal amplification stages including the phone stage consist of the thermionic tubes. Moreover, the mute of the output is carried out until it will be in the status that the thermionic tube can get warm and output by an automatic turn-on delay, and the influence of the noise by an extraneous vibration etc. is reduced.

The unity couple circuitry original with a mac and the bifilar-wound output transformer are employed as a power amplifier part. By this, a flat frequency response and wide band power handling are secured.

The electromagnetic switch which enclosed inert gas is adopted. This switchpoint is strong to oxidization and enables the distorted signal switchover which is not, without raising a poor contact over a long period of time.

The blue-eyes power meter which displays the output power actually outputted is carried.


Rating of a mode
Form Tube integrated amplifier
<Power amplifier part>
Output power stereo: 75W+75W (2ohm, 4ohm, 8ohm)
Input sensitivity/impedance Line: 2.5V/22kohm
Phone: 2.5mV / 47kohm
<Preamplifier part>
Input sensitivity/impedance Line: 450mV / 22kohm
Phone man-month: 4.4mV / 47kohm
Gain A line -> pre out: 15dB
Line -> tapes output: 0dB
THD 0.5% or less
Speaker output One line x3 (the object for 2 ohm, the object for 4 ohm, for 8 ohm)
Input terminal Line RCA: Six lines (one phone man month/Aux switchover)
Line XLR: One line
Power input RCA: One line
Sound-recording output-terminal RCA: One line
Pre-out termination RCA: One line
Valves employed Preamplifier part: 12AX7Ax2
Phone: 12AT7Ax2
Power amplifier part: KT88x4
Power consumption 250W
The maximum Dimensions Width 445x height 257x depth of 470mm
Weight 35.0kg
Adjunct Remote control