Acoustic Energy Aegis Neo Manuel du propriétaire - Page 6

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6. Controls & System Setup

Select a few short examples of familiar programme material - both movie and

music - to use while adjusting the subwoofer. Listen also from a variety of different

positions in the room. Check for balance and consistency of sound - neither too

much nor too little bass across the range of programme material and listening

positions. Experimentation and careful listening is the key to finding a good

subwoofer setup.

Sub-woofer Location

Broadly speaking, the closer a subwoofer is to the corner of the room (assuming the

walls are solid), the more bass it will generate in the room (and the lower its volume

need be set). Moving the subwoofer closer to a corner however will also tend to

reduce the consistency of the subwoofer volume over the listening room (a corner

location being the worst in this respect). Positions closer to the corner will also tend

to change the character of the bass produced by the subwoofer - it will emphasise

the very lowest signals more. This change in bass character with location is the

variable that enables a good compromise position for the subwoofer to be found.

Volume Level

Setting the subwoofer volume is important in terms of both overall system balance

and the demands of different types of programme material. You may find that

material with an emphasis on music works better with a lower subwoofer volume

than movie material with an emphasis on "effects". Finding a compromise between

the two is a matter of subwoofer volume adjustment in parallel with adjusting its

position in the room.

Crossover Frequency

As you adjust other parameters you may find that moving the crossover frequency

a little from the suggested starting value is beneficial. Adjust other aspects of the

setup, particularly subwoofer location and phase, before adjusting the crossover

frequency significantly.

Phase

Adjusting the subwoofer

Phase

should be left until after the Location is chosen

and the

Volume Level

and

Crossover Frequency

the phase if it is proving difficult to get satisfactory results by location, volume and

crossover adjustment alone.

Notch Frequency, Notch Slope

and

If, while adjusting the subwoofer, it becomes apparent that a low frequency room

resonance (bass boom) is dominating the sound of the system, the

can be used to suppress the resonance. First, set the

Notch Level

-12dB

. Now adjust the

and listen to the effect on the sound. When the

frequency of the room resonance (usually between 60Hz and 90Hz in typically

dimensioned rooms) its effect on the sound will be suppressed. When the correct

frequency has been identified, adjust the

the sound. Aim for a high

Notch Slope

0dB) value.

Page 4

are set. Experiment with adjusting

Notch Level

Notch Filter

Notch Slope

MAX

Notch Frequency

in steps from 45Hz upwards

matches the

Notch Frequency

Notch Slope

and

Notch Level

value and a low

Notch Level

(i.e. close to

If the Notch Slope is set too low (especially if the

Note:

Crossover Frequency is set to a low value) it will begin

to operate more as a second volume control. Try to

keep the slope set relatively high.

Note:

The Notch Filter will have increasingly little

effect as its frequency is adjusted above the crossover

frequency (nominally 80Hz on audio-visual LFE signals).

Once the

Notch Filter

worthwhile revisiting and fine-tuning the

Crossover Frequency

7. Specification

Type:

Closed box, active subwoofer.

Drivers:

0mm pulp cone with 48mm thermally

bonded voice coil. High-power long-throw magnet

system.

Low Frequency Cut-off:

Amplifier:

00 Watts into 8 Ohms

and the

Low Pass Filter:

Variable nd order, 45Hz to 50Hz

Phase:

Variable 0° to 80°

Notch Filter:

Variable. Frequency: 40 to 00Hz, Q: .5 to

5.0, Level: 0dB to -dB

to fine-tune

Dimensions (H x W x D):

Weight:

7.0kg (single, unpacked)

Acoustic Energy reserves the right to modify product

specifications.

is set it will probably be

Volume Level

and

Phase

settings again.

- 6dB @ 6Hz

40 x 360 x 35mm