McIntosh MC207 User Manual

Page 17

Technical Description

tortion of many non-feedback designs.

All transistors are selected to have nearly constant cur-

rent gain over the entire current range they must cover. Out-
put transistors in particu-
lar, have matched uni-
form current gain, high
current-bandwidth prod-
uct and large active re-
gion safe operating area.
To accommodate the high
current demands of a 4
ohm loudspeaker, the
MC207 Output Circuitry
utilizes a multiplicity of
power output transistors.
Refer to figure 14. An
automatic tracking bias
system completely elimi-
nates any trace of cross-
over distortion. Precision
metal film resistors and
low dielectric absorption
film capacitors are used
in all critical circuit loca-
tions.

The MC207 is the

Figure 13

Block Diagram of the Amplifiers

and

Meter Circuitry

(One of Seven Channels Illustrated)

Figure 14

first McIntosh Power Amplifier to use the newly developed
Dynamic Power Manager

(DPM) Circuitry. Refer to fig-

ure 15 on the next page. The MC207 can easily drive 4