Acoustic Energy Aegis Neo Owner's Manual
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Page 36. Controls and System SetupSubwoofer ControlsAccompanying the mains and signal input sockets onthe subwoofer connection panel are a Power switch, aVolume Level control, a Crossover Frequency control,a Phase control and Notch Frequency, Slope andLevel controls. Their functions are described in thefollowing paragraphs. Use of the controls to setup andadjust the subwoofer is described in the System Setupparagraphs.PowerThe power switch incorporates an automatic switch-on/off function. With the switch set to AUTO thesubwoofer will switch on automatically when anaudio signal is present. It will switch off again whenno signal has been present for around 0 minutes.With ON selected the subwoofer remains switched-onpermanently.Note: There is a short delay between auto switch-onand audible sound from the subwoofer.Volume LevelThe level control adjusts the volume of the subwooferrelative to the satellites. Begin with the level controlset to around 50%. Detailed subwoofer adjustmentguidelines can be found in the following paragraphs.Crossover FrequencyThe crossover frequency control adjusts the upper frequency at which thesubwoofer output is filtered for the full-range speakers to take over. If the AegisNeo Subwoofer is to be used exclusively in an audio-visual system it should beconnected via the AV Subwoofer Line Input on which the Crossover Frequencycontrol is inoperative.If the Aegis Neo Subwoofer is to augment the low frequency performance of a pairof full range speakers, the crossover frequency should be set to match their lowfrequency roll-off frequency. The larger the speaker, the lower its low frequencyroll-off will be. Finding the optimal crossover frequency setting will requireexperiment and adjustment, but reasonable initial values for different speakertypes are as follows:Large floor stand speaker (Aegis Neo 3): 45HzMedium stand mount loudspeakers: 60HzSmall stand mount speakers (Aegis Neo ): 80HzMiniature satellite loudspeakers: 00HzSubwoofer PhaseThe phase control varies the subwoofer acoustic phase (timing) with respect to thesatellites. With the switch set to 0° the subwoofer output is in phase with the fullrange speakers. With the control set to 80° the subwoofer output is out of phase.Adjusting the subwoofer phase can help optimise the sound of subwoofer systems.Further subwoofer phase advice can be found below.Notch Frequency, Slope and LevelThe Notch Frequency, Slope and Level controls enable a targeted Notch Filter tobe applied to the subwoofer output. Such a filter can be useful in reducing theaudibility of any listening room resonances. The Notch Frequency control sets thecentre frequency of the filter, the Notch Slope control sets the sharpness of thefilter (maximum slope equals sharpest filter) and the Notch Level control sets thedepth of the filter. Setting the Notch Level control to 0dB switches-off the filter.System SetupBefore listening to your subwoofer and system make one final check of the cablesand connections. If all appears well begin listening at a relatively low volume toconfirm that the system is operating as expected. Only increase the volume if youare happy that the sound at low volume is fundamentally as expected. If you areunhappy, turn the system off and re-check all the cables and connections.The Aegis Neo Subwoofer may take a little time to reach normal operatingtemperatures and to “run-in”. Your ears too will take some time to adjust to the newsound, so it is unwise therefore to make rapid judgements about the performanceof the system.The most important aspect of the Aegis Neo Subwoofer setup is its integrationwith the satellite speakers. Assuming the locations chosen for these are satisfactory,adjusting the subwoofer’s location in the room, its Volume Level and Phase, and, ifit is used in a conventional stereo system, its Crossover Frequency, should enable agood result to be achieved. Leave the Notch Level control initially at 0dB. |
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