Anthem AVM 20 Setup Menu - 7. Setup Menu
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7. SETUP MENU
continued …
Advanced Settings Setup – Subwoofer Phase and Polarity:
You can also make precise Subwoofer Phase and Polarity adjustments. These allow you to optimize the the
bass performance of the subwoofer in your system as needed.
Room acoustics vary. If you have the flexibility, experiment with subwoofer placement to determine where
it sounds best in your system, providing deep, tight and well defined bass. Certain subwoofer positions,
however, may cause some bass frequency cancellation – when your front speakers and subwoofer are “out-
of-phase”, they work against each other, resulting in weak and sometimes dislocated sounding bass. This
can be corrected by adjusting the Subwoofer Phase and Polarity settings in this submenu.
If your subwoofer has controls, be sure to set the subwoofer’s cut-off frequency (low-pass) as high as it goes
(or bypass) and its phase control to zero before you make any adjustments in this menu – these functions
will now be controlled by the AVM 20’s Advanced Settings Setup.
When a subwoofer is placed beside or close to the Front speakers, as a general guide, set the Polarity to
‘Normal’. For subwoofers that are at the behind the listening area or toward the back of the room, set Polarity
to ‘Inverted’. With bass material playing, switch the Polarity from ‘Normal’ to ‘Inverted’ as a quick check, and
listen for which has less bass cancellation – leave it in the position where the bass is louder.
While Subwoofer Polarity provides a 180 degree switch (Inverted), Subwoofer Phase allows you to fine tune
the phase alignment of the subwoofer to your front speakers. With bass material playing, adjust the Phase
and listen for any bass cancellation – also leave this in the position where the bass is louder. Alternatively,
listen to the ‘shhhh’ noise created between FM radio stations, and adjust the phase control until the most
natural sounding transition from the main speakers to the subwoofer is found.
THX Audio Setup:
ASA is a proprietary THX technology which processes the sound fed to the two surround and two rear
speakers to provide an optimal surround sound experience. When you set up your home theater system
using all 7.1 speaker outputs, placing the two Rear speakers close together will provide the largest sweet
spot. If for practical reasons you have to place the Rear speakers further apart, go to the THX Audio Setup
menu and choose the setting that most closely corresponds to the Rear speaker spacing.
4i.
THX AUDIO SETUP
a.
NUMBER OF REARS : Two
b. UNITS :
ft
c.
L-REAR TO R-REAR : 4+ ft
d.
THX ULTRA2 SUB : No
e.
BG COMPENSATION : NA
4h. ADVANCED SETTINGS SETUP
This menu is active when
ADV SETTINGS: On in Menu 4
a.
L/R FRONTS XOVER : 80 THX
b.
CENTER XOVER : 80 THX
c.
SURROUNDS XOVER : 80 THX
d.
7.1 REARS XOVER : 80 THX
e.
SUBWOOFER XOVER : 80 THX
f.
SUBWOOFER PHASE :
0 Deg
g.
SUBW’FR POLARITY : Normal