MCACC MCACC ProThe Essence of MCACC Advanced MCACC Feature Comparison Technical DetailsIntroduction
MCACC Reference Guide
Introduction
MCACC Overview
To get the best results from a home theater system, it needs to
be fine-tuned, just like a musical instrument, for accurate
reproduction of sound as the original artists intended. Yet, this is
no easy task in a household multi-channel environment with all
the speakers, furniture, the size and shape of the room, and
various other issues. That’s why Pioneer developed MCACC
(Multi-Channel ACoustic Calibration system), a unique system
which measures and analyses the reverb characteristics of the
speakers, and optimally tunes the sound output to make it just
right for the room.
MCACC was originally introduced in 2001 as the world’s first
automatic sound acoustic correction technology. With the
addition of Phase Control technology which compensates the
phase lag of the low-frequency signals, multi-channel sound is
now further optimized to bring out the best from your home
theater. MCACC is now available at three levels—MCACC,
Advanced MCACC, and MCACC Pro—in accordance with the
grade of the AV receiver.
MCACC—Basis of Acoustic Field Correction
With a dedicated microphone, MCACC measures
the speaker size, level, and distance and
automatically compensates for the difference.
The delay of the subwoofer sound is also adjusted to be in
phase with the other channels.
Details on page 5
Advanced MCACC—Precise Speaker Drive and
Advanced Correction for the Listening Environment
Advanced MCACC features a 3D calibration
method with even more precise measurements
by including the time axis, as well as Auto Phase
Control Plus for real-time analysis and automatic
compensation, Standing Wave Control for reducing unwanted
resonance, and Subwoofer EQ for adjusting the LFE tone.
Details on page 6
MCACC Pro—Professional Level Correction from
Source Material to Speaker Output
In addition to the above features, MCACC Pro
goes a step further by analyzing the phase and
group delay characteristics due to network
filtering to precisely control phase differences
between speakers. The result is the sound coherence of full-
range speakers while retaining the wide frequency range
advantage of multi-way speakers. This correction is also
performed between channels, providing a smooth flow of sound
as if all delivered from the same type of speaker. Other features
include independent correction for dual subwoofers, and speaker
position adjustment in 1-millimeter increments. MCACC Pro
corrects phase differences in all ranges and all channels, from
phase difference in the original audio material to the sound
emitted from the speakers.
Details on page 8
Optimize Speakers’
Characteristics
Optimize Room Acoustic &
Source Condition
Optimize AV Receiver’s
Performance
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