Audio Database


McIntosh MC7300 650,000yen(September, 1991 release)

Stereo power amplifier which made the output of MC2600 the one-half.

The output transformer of a new-installation meter is adopted and output which is not related to a load intensity, and output current capacity which exceeds 85A at a peek are realized.

The signal system has adopted the circuitry which used MC2600 as the base, and supports the balance / imbalanced input. Moreover, the sensitivity changeover switch of 2.5V and 1.4V is equipped.
Technologies, such as a symmetry amplification after the predrive stage and an auto tracking bias scheme which does not generate crossover distortion, are adopted.

The gilding terminal which can respond also to a 6mm cable is adopted as an output-terminal.

The large-sized power meter has also adopted the newly developed thing, detects and calculates an Output voltage and an electric current, and shows correctly the actual Output voltage which changes every moment.
A meter pointer corresponds to about 10 times as high-speed responses compared with business-use VU meter, and a peek hold window is also possible for it.

At the time of an emergency over-temp, the auto-return type thermal cut-out operates.
Moreover, if the wave of an input and an output is compared and distortion exceeds the amount of conventions, the power guarding system on which gain is dropped automatically is also carried.
No less than a total of seven kinds are carried, and these careful protections are putting into practice and suppressing the unusual operation.

Rear Internal

Rating of a mode
Form Stereo power amplifier
Output Stereo: 300W+300W (a sinusoidal consecutive output, load-impedance 2/4/8ohm)
Mono-bridge: 600W (a sinusoidal consecutive output, load-impedance 4/8/16ohm)
Mono-parallel: 600W (a sinusoidal consecutive output, load-impedance 1/2/4ohm)
Output load impedance Stereo: 2 ohm, 4ohm, 8ohm
Mono-bridge: 4/8/16ohm
Mono-parallel: 1/2/4ohm
Output frequency band 20Hz - 20kHz
THD Stereo: 0.005% or less
(at the time of 20Hz - 20kHz, 250mW-300W, and both channel drive)
Monophonic recording: 0.005% or less
(at the time of 20Hz - 20kHz, 250mW-600W, and both channel drive)
Cross modulation distortion
(at the time of 20Hz - 20kHz, and both channel drive)
Stereo: 0.005% or less
(a one side channel and less than peek 300W)
Monophonic recording: 0.005% or less
(it is attached to a one side channel and is less than peek 600W)
Frequency band (at the time of 1W output) 20Hz - 20kHz, and +0 -0.25 dB
10Hz - 100kHz, and +0 -3.0 dB
SN ratio 105dB or less (at the time of an Output power A Wei Ted)
Dynamic head room 1.9dB(IHF)
Dumping factor 40 or more
Input impedance 20kohms (unbalance)
40kohms (equilibrium)
Input sensitivity 2.5V and 1.4V switching
Power guarding It is less than THD2% to over-drive 14dB at 1kHz.
Power source AC100V, 50Hz/60 Hz, 0.6A-13A
Dimensions Width 443x height 196x depth of 420mm (termination included)
Weight 35kg