Tannoy VLS SERIES

7. Equalisation
VLS Series Operation Manual rev 1.0.0
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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centeraxis,whilethepatternoftheVLS30is+3/-11degreesfrom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.
VLS 7/15: + 6°
VLS 30: + 3°
VLS 7/15: - 22°
VLS 30: - 11°