Audio Database


McIntosh MC501 682,500yen( one-set, including-tax. around the 2007 time)

Monophonic power amplifier which adopted the perfect quad balance circuitry.

Two symmetrical full balance circuitries are constituted from all the signal paths from an input to an output, and the noise component and the distorted component are reduced to the level below a limit of measurement by the perfect quad balance circuitry which combines each output by auto FOMA.

By adopting wide-range output auto FOMA, an equivalent output is sent to each load intensity also in which 2/4/8ohm load intensity, maintaining a wide band property (10Hz - 100kHz).
Moreover, a speaker is protected from damage to the system by the fault of a power transistor etc.

When a difference arises in an input/output wave exceeding the maximum power capacity, a comparator supervises the power guarding, and the dynamic operating time, voltage and electric current of an output stage which restrict gain and restrict distortion of an output, and the sentry monitor circuitry controlled to suppress an electric current in safe level is carried.
Furthermore, protection networks, such as DC protection, a temperature protection, a turn-on latency, and an in rushes protection, are carried.

The blue-eyes power meter which displays the output actually outputted is carried.
Moreover, it is also possible to turn OFF the illumination of meter.


Rating of a mode
Form Monophonic power amplifier
Output power 500W (2ohm, 4ohm, 8ohm)
THD 0.005% or less
Input sensitivity/impedance Balance: 4.2V/20kohm
Unbalance: 2.1V/10kohm
Speaker output One line x3 (the object for 2 ohm, the object for 4 ohm, for 8 ohm)
Input terminal RCA: One line
XLR: One line
Power consumption 8A
The maximum Dimensions Width 445x height 245x depth of 376mm
Weight 40.2kg