McIntosh MC1000
¥ 1,800,000 (1 set of 2, released in 1992)
Commentary
Monaural power amplifier capable of supplying energy with continuous output 1000W.
All stages adopt a double-balanced push-pull circuit realized by Macintosh output transformer technology.
This circuit is a symmetrical amplifier circuit consisting of four pairs of complimentary service balance circuits. It can be realized only by using an output transformer. This circuit realizes low distortion while using 20 parallel 40 power devices.
The power output meter is marked with a peak value of 4000W.
This meter can respond 10 times faster than a professional VU meter and accurately displays the product of output voltage and current.
It is equipped with up to 7 protective circuits such as thermal protection in case of heating and power guard system which always prevents clipping distortion.
The Power Guard system constantly compares the input and output waveforms of the amplifiers and starts distortion control operation when the difference exceeds 0.3%. First, the Power Guard indicator lights up to control the input signal voltage. Instead of reducing the output, however, it is designed to allow overdrive of up to 14 dB until distortion reaches 2%, thus preventing clipping distortion from damaging the speakers.
In addition, the output transformer prevents DC current from flowing out due to an output transistor accident.
The power output meter can be switched to peak hold mode.
Uses a large gold-plated speaker terminal that can directly connect extremely thick speaker cables with a core diameter of 5 mm. This terminal is also compatible with banana plugs.
The optional power controller allows you to turn power on/off from the preamp.
Model Rating
Type | Monaural power amplifier |
Rated Output (Sine Wave Continuous Output) | 1,000W (2 Ω, 4 Ω, 8 Ω) |
Load impedance | 2 Ω, 4 Ω, 8 Ω |
Output frequency band | 20 Hz to 20 kHz |
Total harmonic distortion rate (20 Hz to 20 kHz) | 0.005% or Less (at 250 mW ~ 1,000W Output) |
Intermodulation distortion factor (20 Hz to 20 kHz) | 0.005% or less (within 2 times of the rated output) |
Frequency Band (at 1W output) | 20 Hz ~ 20 kHz + 0 -0.25 dB 10 Hz ~ 100 kHz + 0 -3dB |
Signal-to-noise ratio (IHF-A) | 115 dB (at rated output) |
IHF Dynamic Headroom | 1.5dB |
Damping factor | 30 or more |
Input impedance | 10k Ω |
Input sensitivity | 2.5V |
Power Guard | Overdrive at 1 kHz up to 14 dB THD within 2% |
Pwer | 100 VAC, 50Hz/60Hz, 1,440W (UL/CSA) |
External dimensions | Width 445x Height 255x Depth 491 mm |
Weight | 46kg |