Anthem Audio D2 - Manual (Page 34)

26
Bass response highly depends on room acoustics and experimentation with subwoofer placement is
recommended. Start by temporarily placing the subwoofer in the listening area, play some music with a
range of bass and walk around the room. Positions where the bass range sounds smooth are suitable
for permanent subwoofer placement as long as decor allows.
Crossover (Xover) Frequency:
The crossover divides audio in two frequency bands, resulting in lower bass level in Small channels and no
midrange/treble in the subwoofer. If your subwoofer has a crossover, it should be bypassed – set its
frequency control to the highest frequency.
A crossover does not cut frequencies off like a cliff, but rolls them off according to a slope. If set to 80 Hz,
for example, your main speakers will still play lower frequencies – they just won’t have to play them as loudly.
This also lightens the load on the amplifier leaving extra power for mid and high frequencies. Setting the
crossover to the lowest number on your speaker’s specification page is unlikely to provide the best result.
Using the buttons choose a frequency between 25 Hz - 160 Hz suitable for the low frequency capability
of your speakers. With THX certified speakers, the crossover should be set to 80 Hz.
LFE is redirected only when Subwoofer is set to No. If set to Yes or Super, the Movie configuration XOVER
FREQ should not be set much lower than 80 Hz otherwise some LFE information will be lost.
Advanced Settings – Crossover Frequency:
When ADV SETTINGS is set to On, each speaker type can be set to a Crossover Frequency that best suits its
low frequency characteristics and room acoustics. For example, if placing a speaker against a wall causes
excessive bass, the Advanced Crossover can be used to roll off the excess bass.
If room acoustics cause response to drop in the crossover region, the subwoofer channel can be set to
overlap other channels to compensate, for instance setting SUB/LFE XOVER to 90 Hz and FRONTS XOVER to
70 Hz. In the opposite situation, if there is a bass peak in the crossover region, you can spread settings to
flatten response, for example SUB/LFE XOVER to 70 Hz and FRONTS XOVER to 90 Hz.
A very low setting, such as 25 Hz, may be used to protect full-range speakers from potentially harmful
signals. Scrolling below 25 Hz or above 160 Hz brings the Off setting which bypasses the crossover.
Advanced Settings – Subwoofer Phase and Polarity:
Certain subwoofer positions can cause bass frequency cancellation. When the front speakers and
subwoofer are out of phase or misaligned, they work against each other resulting in weak and dislocated
sounding bass. This can be corrected by adjusting Phase and Polarity.
If your subwoofer has these controls, set them to zero/normal before making menu adjustments. The
advantage of adjusting through the setup menu is hearing changes instantly from the listening position.
As a general guide, set Polarity to Normal if the subwoofer is near the front speakers and to Inverted if the
subwoofer is near the back of the room. With bass material or the “shhhh” noise between FM radio stations
playing, compare Normal to Inverted and use the setting that provides louder bass.
The Phase control provides further alignment – listen to FM “shhhh” noise and adjust until bass is loudest.
Advanced Settings – Bypass LFE Crossover:
If you have set SUB/LFE XOVER to much lower than 80 Hz, the upper portion of the LFE signal will be lost.
With BYPASS LFE XOVER set to Yes, LFE goes to the subwoofer without going through the crossover,
preventing loss of LFE information. This also applies to the 6-Ch input’s SUB input (effectively an LFE input).
3. SETUP
continued …