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ANTHEM ROOM CORRECTION
ARC corrects the effects of reflective surfaces and room boundaries on sound quality
by measuring the response of each speaker relative to the listening area and equalizing
it. ARC equalizes response without stressing the amplifier or speakers and does not
downsample the source material to process it. ARC’s filters are neither graphic nor
parametric – ARC is a sophisticated system that flattens response using its ability to
create practically any suitable function, inherently correcting phase effects created by the
room.
The default correction range is up to 5 kHz. Although the limit can be changed if
needed, a higher one is generally not advised since the microphone becomes directional
at upper frequencies, affecting measurement accuracy especially if the height of the
speaker’s high frequency driver is not at ear level.
ARC also detects how much the room reinforces low frequencies due to its boundaries
and pressurization. This room gain shows as a bump in the target response. ARC does
not remove it because if flattened, bass sounds thin. Ideal anechoic speaker response,
a straight line as measured in a special non-reverberant facility, is not the same as ideal
in-room response which normally includes, to varying degree, this room gain.
ARC senses where each speaker’s low-frequency response declines and sets high-pass
filters accordingly. Calibration is set such that average level is the same when comparing
EQ “On” vs “Off”. Note that to set levels ARC uses a midrange band that’s wider than
the standard home theater setup noise, which is centered at 1 kHz and narrow so
there’s no chance its level would be reduced by a crossover.
Sample response:
Eq IS ALSO AVAILABLE FOR
MY SUBWOOFER(S) – SHOULD
I USE IT?
Since rooms and correction
systems, the answer varies
although it is best to disable the
subwoofer’s EQ before running
ARC. If the resulting calculated
and target curves resemble each
other, there is usually no reason
to use the sub’s EQ. If the curves
significantly differ through a wide
range, enable the sub’s EQ and run
ARC again to see if it helps. If you
have run ARC with the sub’s EQ
enabled, ARC must be run again
once the sub’s EQ is turned off.
Multiple Paradigm subs with PBK:
Results are often better with PBK
run on each sub before using ARC.