Audio Database


McIntosh MC2600 1,000,000yen(1990 release)

Stereo power amplifier announced as the top who attained the maximum output and the minimum distortion simultaneously in the mac power amplifier group, and a model.

The stereo has realized Oide power of 1200W in 600W+600W and a mono-operation of bridge connection. Since this consecutive output is using the output transformer, it does not change to 2ohm-8ohm (they are 1ohm-16ohm at the time of a monophonic recording).
Moreover, the power margin which can supply the dynamic power of 2,200W+2,200W (at the time of a mono-operation 4,400W) is realized also to a heavy load lower 80% than a rated impedance. And it has the output current capacity which attains to 200A at the maximum, and the powerful speaker drive is realized.

The power device of a total of 36 9 parallel is adopted as an output stage, and the exothermic is reduced by the large-sized heat sink or the automatic tracking bias circuit with the operational stability of the power stage by an output lance. Furthermore, when a prolonged high power operation continues, the low undesired-sound heat-dissipation fan of two velocities operates, and low-temperature degree operation-ization is attained.
Moreover, in preparation for an emergency over-temp, the auto-return type power-source contact breaker is built in.

In order to correspond to the excessive input exceeding a clipping output, the power guarding system original with a mac is carried, and gain is automatically dropped at the time of an excessive input.
Moreover, to excessive electric currents, such as output short-circuit, the sentry monitor system is controlling the output current.

The new mac circuit which does not generate crossover distortion, loading of a balanced amplification, and strict impedance distribution of each stage and examination of a stream-composition part were given to the circuitry, and the low distortion is realized to a minute output area with the Oide power amplifier in it.

The large-current capacity gilding terminal is adopted as an output-terminal.


Rating of a mode
Form Stereo power amplifier
(sinusoidal consecutive output)
stereo: 600W+600W (2ohm, 4ohm, 8ohm)
mono: 1,200W (1ohm, 2ohm, 4ohm, 8ohm, 16ohm)
Output load impedance stereo: 2 ohm, 4ohm, 8ohm
mono parallel: 1 ohm, 2ohm, 4ohm
mono bridge: 4ohm, 8ohm, 16ohm
Output frequency band 20Hz - 20kHz
(20Hz - 20kHz)
stereo: 0.005% or less (250mW-600W, both channel operation)
mono: 0.005% or less (250mW-1200W)
Cross modulation distortion
(20Hz - 20kHz)
stereo: 0.005% or less
(It is about a single-sided channel at the less than peek 1,200W and both of channel operations time. )
mono: 0.005% or less (a peek and less than 2,400W)
Frequency band
(at the time of 1W output)
20Hz-20kHz+0 -0.26 dB
10Hz-100kHz+0 -3 dB
SN ratio 105dB or less (at the time of an Output power A Wei Ted)
IHF dynamic head room 1.7dB
Dumping factor 40 or more
Input impedance 20kohms (unbalance)
40kohms (equilibrium)
Input sensitivity 1.4V and 2.5V switching
Power guarding It is less than THD2% to over-drive 14dB at 1kHz.
An attached functionality The power meter of an illumination with a voltage regulator
The meter window changeover switch of WATTS/HOLD
Right-and-left independent gain volume
Headphone monitor termination
Speaker on/off switchpoint
Power source AC100V, 50Hz/60 Hz, 2A-24.5A and 15A, Underwriters Laboratories/CSA
Dimensions Width 483x height 267x depth of 457mm (termination included)
Handle path clearance 44mm
Weight 59kg