Macro-Tech 600 Maximum Power Matrix - Crown Macro-Tech MA-1200 Reference Manual

Macro-Tech 600/1200/2400 Power Amplifiers
Maximum Power Specifications
Crown's maximum power specifications represent the largest amount of output power you can expect from your amplifier when
it is driven to full output under the given conditions. These specifications can be used to prevent loudspeaker and hearing
damage.
The maximum power matrices include specifications for single cycle and 40 millisecond burst sine waves. Burst signals act
like large transient peaks that are present in common source signals. Loudspeakers can respond to a single cycle burst, so the
single cycle burst specifications should be used to help you protect your loudspeakers. In contrast, a 40 millisecond burst
represents the typical response time of the human ear. Your ear will not respond to the entire dynamic change of a burst that
lasts less than 40 milliseconds.
The burst power specifications are provided at 0.05% THD which is a practical low-distortion condition. Operating the amplifier
at levels higher than 0.05% THD can result in output power levels that are higher than those listed in the maximum power
matrices.
Fig. 6.4 Macro-Tech 600 Maximum Power Matrix
Reference Manual
Maximum Power Notes:
All maximum 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 best-case transformer tap (nor-
mally 240 VAC, 60 Hz). Although it is
an unusual condition, your amplifier
can function well with AC mains volt-
ages up to 10% over the specified line
voltage. With overvoltage conditions,
your amplifier may be capable of de-
livering instantaneous power levels up
to 20% greater than the specifications
in the matrix.
1. A single cycle sine wave is pre-
sented to the amplifier and moni-
tored for nonlinear distortion. The
average power during the burst is
reported. Loudspeakers must be
able to withstand this level if they
are to be safely used with this am-
plifier.
2. A 40-millisecond sine wave burst
(10 percent duty cycle) is pre-
sented to the amplifier and moni-
tored for nonlinear distortion. The
average power during the burst is
reported. This power level is a
measurement of the amplifier's
maximum transient power that can
be perceived by the human ear.
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