4
AV RECEIVERS REFERENCE GUIDE
Audio T
echnologies
Video T
echnologies
Audio Formats & Licenses
Sophisticated Surround System
Connectivity
Network Features
Advanced Control
Audio Technologies
MCACC Auto Room Tuning
1131
831
531
Create the optimum acoustic environment with
Pioneer’s MCACC (Multi-Channel Acoustic
Calibration System), developed with the
expertise of professional recording studios. The system—
complete with custom microphone—automatically compensates
for differences in speaker size, level and distance, and equalises
response.
Phase Control
1131
831
531
When amplifying multi-channel audio signals,
receivers use a Low Pass Filter (LPF) to process
low-frequency signals for subwoofer output. This
causes “phase lag”—a delay of approximately 5
msec—of the low-frequency signals compared to the main
channel signals. As a result, the delayed bass makes the
sound lack synchronisation. Pioneer’s Phase Control
technology effectively eliminates phase lag and significantly
improves the multi-channel sound without any extra
operation.
Subwoofer EQ
1131
831
This EQ feature allows you to adjust the LFE tone. As with
other EQ, the manual adjustment can be done on the AV
receiver’s GUI.
Bass Management System for Dolby-Enabled Speakers
1131
When using Dolby-enabled speakers, the low-frequency
components are usually all redirected to the subwoofer.
Since this will include frequencies featuring directivity, the
resulting sound lacks a seamless feel. MCACC redirects the
low frequency component with directionality to the floor
speaker below the Dolby-enabled speaker element, and the
lower frequency components to the subwoofer. This optimal
signal distribution creates superior sound localisation,
maximising the advantage of Dolby Atmos content.
Dolby-enabled
speaker sound
component
3 Parts
2 Parts
Pioneer
Previous Models
20 Hz
80 Hz
Deep
Bass
Bass
Mid-High
Subwoofer
180 Hz
150 Hz
20 kHz
Deep
Bass
Bass
Deep Bass
Mid-High
Mid-High
Bass
Deep Bass
Mid-High
Bass
Subwoofer
With Traditional Bass Management System
No horizontal sound localisation
Ideal sound image
Ideal sound image =
Auditory sound image
Auditory sound
image
With New Bass Management System for
Dolby-Enabled Speakers
Horizontal sound localisation achieved
The "Phase Control" Compensates for the Delay of Low-Frequency Sound
Speakers
AV Receiver
PHASE CONTROL
Source
Calibration
After Calibration
Speaker distance, sound pressure level, and
frequency response are all equalised.
Before Calibration
Speaker distance, sound pressure level, and
frequency response are all uneven.
The sound field is automatically
measured using the supplied mic.
Speaker sizes and number of
speakers are automatically detected.
SET-UP
MIC
SET-UP
MIC
Acoustic Calibration by MCACC
