Tannoy VLS 15 - 7 Equalisation; 8 Mounting and Flying; Asymmetrical Pattern Considerations

VLS Series Operation Manual rev 1.1.0
9
7. Equalisation
7. Equalisation
VLSSeriesloudspeakersrequirenoequalisationorcorrectiontoovercomesystemlimitations;equalisation
isnecessaryonlytocompensatefordifcultacousticenvironments.Over-equalisationcanreducesystem
headroomandintroducephasedistortion,resultingindegradedsound.Ifequalisationisrequired,itshould
beappliedgentlyandsmoothly.BecauseVLSSeriesloudspeakersarephasecoherentdesigns,excessive
equalizationusuallyprovesdetrimentaltotheoverallsoundquality.Whenoneloudspeakerisusedinclose
proximitytoanother,comblteringeffectscancreatecoverageproblems.(Comblteringcreatesanuneven
frequencyresponseacrossthecoverageareaduetoconstructiveanddestructiveinterferenceeffects
betweenthetwosources.)Comblteringcannotbecuredbyequalisation;thisshouldbeaddressed
withproperloudspeakerplacement.
8. Mounting and flying
8.1 Asymmetrical pattern considerations
VLSSeriesloudspeakersaredesignedwithanasymmetricalverticaldispersionpattern,afeaturewhichallows
improvedperformancewithsimpliedmountinginmanyapplications.TheverticaldispersionoftheVLS7and
VLS15is+6/-22degreesfromacousticcenteraxis,whilethepatternoftheVLS30is+3/-11degreesfrom
acousticcenteraxis.Pleasebeawareofthisfeaturewhenplanningyourinstallation.Inmanysituationswhere
conventionalcolumnloudspeakerswouldrequiresubstantialdownwardtilt,aVLSSeriesloudspeakerwould
requirelesstiltorevenallowushmounting,thusprovidingasimplerinstallationwithimprovedvisualaesthetics.
+6°
-22°
+3°
-11°
VLS 30
671 [26,41]
536 [21,11]
+6°
-22°
536 [21,11]
VLS 7 VLS 15