11AX Manual / english5.1 ControlsOn the rear side you will find controls that allow de-tailed fine-tuning of your loudspeakers to your particu-lar room acoustics and personal listening preferences.The following tips are intended to assist you at usingthe controls in the best manner.Please note that using the controls may have a greatimpact on the overall sound characteristics of yourloudspeakers. We recommend using the controls withutmost care and only after several audio tests with fa-miliar recordings.5.2 Tweeter LevelThe ‘Tweeter Level’ works within the frequencyrange of the tweeter raising or lowering up to ±4dB. It alters this frequency range as a whole (seefig.).A5X/A7X/A77X/A8X only:5.3 High / Low Shelf EQ (Room EQs)The other two controls operate in a different man-ner. The ‘High Shelf’ and the ‘Low Shelf’ are shelv-ing filters, which progressively raise or lower upto ±6 dB.That means the shelving filters do not alter a wholefrequency band but alter in this band: from a cer-tain point (300Hz and 5kHz respectively in thiscase) the frequencies are gradually being changed(see fig.).5. Speaker AdjustmentTWEETER LEVELA5XLOW SHELFHIGH SHELFOUTPUTSTEREOLINKINPUTUNBALANCED INBALANCED INCONTROLSIN-/ OUTPUTS0-6 dB +6 dB0-6 dB +6 dB0-4 dB +4 dBSerial No.T1.6AL (230V~,50Hz)T3AL (115V~,60Hz)130WATTS