Crown MA-1202 Operation Manual page 26

MA Series Power Amplifiers
8 Specifications
Minimum Power Notes:
All minimum power specifications are based on
0.1% regulated AC mains and an ambient room
temperature of 70°F (21°C). International units
with multi-tap transformers are specified for the
worst-case transformer tap (normally 100 VAC,
50 Hz). The standard EIA power measurement
(RS-490) is not identified here because it is
identical to the FTC Continuous Average Power
specification.
1. A 1-kHz sine wave is presented to the ampli-
fier and the output monitored for nonlinear dis-
tortion. The level is increased until the THD
reaches 0.1%. At this level the average power
per channel is reported.
2. A sine wave is presented to the amplifier over
the range from 20 Hz to 20 kHz and the output
monitored for nonlinear distortion. The level at
each frequency is increased until the THD
reaches 0.1%. At this level the average power
per channel is reported.
3. A 1-kHz sine wave is presented to the ampli-
fier and the output monitored for nonlinear dis-
tortion. The level is increased until the THD
reaches 0.05%. At this level the average power
per channel is reported.
4. Continuous power in the context of Federal
Trade Commission testing is understood to be a
minimum of five minutes of operation. Harmonic
distortion is measured as the RMS sum total and
given as a percentage of the fundamental output
voltage. This applies for all wattages greater than
Figure 8.4 Macro-Tech 602 Minimum Power Matrix
0.25 watts.
page 26 Operation Manual