McIntosh MC205 - Manual (Page 16)

16
A continuous average power output rating of 200 watts and
an output current of greater than 25 amperes per channel,
makes this one of the most advanced and powerful ampli-
fiers McIntosh has ever manufactured. Refer to figures 13
and 14. The distortion limits for the MC205 are no more
than 0.005% at rated power output for all frequencies from
20Hz to 20,000Hz. Typical performance at mid frequen-
cies is less than 0.002%. The true distortion readings on
the MC205
are so low,
it takes
special
measuring
techniques
to make
accurate
readings.
The MC205
can deliver
the best
possible
perfor-
mance from
any type of
high qual-
ity Loud-
speaker
System.
Design Philosophy
The MC205 McIntosh Power Amplifier to uses the recently
developed Dynamic Power Manager TM (DPM) Circuitry.
Technical Description
The MC205 can easily drive 4 ohm speakers, with their
high current demand. Additionally, the MC205 can be used
with 8 ohm speakers, and deliver equal power. McIntosh’s
new DPM TM design enables it to run on higher voltage rails
when connected to less current-hungry 8 ohm speakers and
still deliver 200 watts. The power penalty usually paid with
8 ohm speakers on high current amplifiers does not exist
with this new design.
The high efficiency circuit design of the MC205 con-
tributes to low operating temperatures. More than 2100
square inches of heat sink area occupies almost half of the
MC205’s chassis space and keeps the amplifier operating
safely with convection cooling. No fans are needed.
Protection Circuits
The MC205 incorporates its version of the McIntosh Sen-
try Monitor output transistor protection circuit. There is
absolutely no compromise in sonic performance with this
circuit, and it ensures safe operation of the amplifier under
even the most extreme operating conditions. The different
types of protection circuits incorporated in the MC205 in-
sure a long and safe operat-
ing life.
The MC205 also includes the
unique patented McIntosh
Power Guard circuit. Power
Guard eliminates the pos-
sibility of ever overdriving
the amplifier into clipping.
Refer to figures 15, 16 and
17. An overdriven amplifier
can produce both audible and
inaudible distortion levels
exceeding 40%. The audible
Figure 13
Figure 15
Input Test Signal
Block Diagram
of the
Power Amplifier
(one channel shown)
Figure 14