17
It is enclosed in the legendary McIntosh Potted Enclo-
sures and weighs 30 lbs. The six super size main filter
capacitors can store over 350 Joules of energy which
is necessary for the wide dynamic range that “Digital
Audio” demands. Refer to figure 25.
Power Supply Circuits
To compliment the design of the MC462 Power Am-
plifier Circuitry, there is a high current high voltage
power supply. Refer to figures 23 and 26.
The very large Power Transfomer can supply over 13
amps of current. Refer to figure 24 (golf ball is for
size comparsion).
Technical Description, con’t
Figure 23
INRUSH
CURRENT
LIMITER
AC Power
MAIN RELAYS
BACKUP
POWER SUPPLY
CONTROL
LOGIC
LIGHTING
CONTROL
POWER
CONTROL
Block Diagram
of the
Power Supply
Figure 24
Figure 26
Figure 25
The power amplifier draws high current from the AC
power line. Therefore, it is important that they plug
directly into the wall outlet.
Also, most owners desire one power switch for the
whole audio system. The MC462 is equipped with a
circuit that provides remote Power Control from a Mc-
Intosh A/V Control Center. Refer to figure 26. When
the A/V Control Center is switched On, a (+5V) signal
operates the power relay in the MC462. The MC462
also has two remote Power Control Out Jacks. The
Power Control signal from these jacks is delayed by a
fraction of a second so that the turn on power surge of
the next power amplifier occurs at a later time. This
helps prevent power circuit overload that could trip
circuit breakers or blow fuses, a very important fea-
ture in high power Home Systems employing multiple
MC462 Power Amplifiers.
