Audio Database


McIntosh MC2255 1,098,000yen(1982 release)

Stereo power amplifier which put original creativity for a mac to materialize more certainly the policy "it is longer in a better sound."

The original power guarding organization is carried.
The wave comparator which compares the wave status of an input signal and an output signal is built in. If the total amount of higher-harmonic distortion becomes 0.5% or more, an input will be restricted, a clip-block status will be prevented and a speaker will be protected.

The self-diagnostic unit was carried, the circuitry was automatically checked by dividing into seven, the output to the speaker was automatically stopped until it fixed, when there was a trouble part, and the name by impossible operation is prevented.

It is possible to operate a power transistor at a temperature lower about 20 degrees C than the usual amplifier by adoption of the output transformer which the mac developed uniquely, while raising an impedance matching sharply.
For this reason, the Oide power can be pulled out with allowance and the time which can demonstrate the capacity of a system is extended.

Rating of a mode
Form Stereo power amplifier
Effective output stereo: 250W+250W (1ohm-8ohm)
mono: 500W (0.5ohm-16ohm)
Input sensitivity/impedance 750mV, 2.5V/50kohm (a switching is possible)
Input level adjustment A right-and-left independent succession variable
THD 0.02% (at 0.25W - the time of an effective output 20Hz - 20kHz)
Cross modulation distortion 0.02% (at 0.25W - the time of an effective output 20Hz - 20kHz)
Frequency characteristic 20Hz-20kHz+0 -0.25 dB
SN ratio 95dB
Dumping factor 30 or more
Power guarding 2% or less (1kHz, 20dB)
Power source AC100V, 50Hz/60Hz
Power consumption 1.4kW (at the time of an effective output)
Dimensions Width 411x height 181x depth of 368mm
Weight 37.2kg