EAW VR21 Instruction Manual

Contents

EAW VR21 Instruction Manual Manual pdf 9 page image

VR21 and VR51 – 95. OPERATIONSignal ProcessingSometimes external signal processing is desirable to “voice” the loudspeaker toaccommodate particular program material, less than optimum acoustics, feedback control, orpersonal taste. For these purposes, use a suitable electronic signal processor. This can be assimple as a 1/3 octave graphic equalizer or a fully capable DSP (digital signal processor) suchas the EAW Commercial DX810, or the EAW MX8750.Choosing a Power AmplifierThere is no exact answer to the question of what amplifier size you should use for aloudspeaker. The loudspeaker power rating in EAW Commercial’s specifications only meansit has passed a standard power test. This provides a rating that can be used as a point ofcomparison with other loudspeakers. This rating does not necessarily correspond to the bestamplifier size to use nor is it a measure of a “safe” amplifier size to use. Rather, the amplifiershould be sized according to both the sound levels required and the type of audio signalsthat will be reproduced. If you are unsure of how to determine this, consult with a qualifiedprofessional or contact EAW Commercial Technical Support.Preventing damage to the loudspeaker is a function of operating your audio system sothat the loudspeaker is not stressed beyond its design limits.Operating Tips• Do NOT drive any of your electronic equipment into clipping, particularly the poweramplifiers. This can easily damage the loudspeaker.• If driven into clipping, even an amplifier with a power output rating lower than theloudspeaker’s power rating can cause damage to a loudspeaker.• Avoid sustained microphone feedback. This can quickly cause failure of high-frequency drivers.• Avoid extreme boosts on equalizers as these can cause excessive input to the driversat the boosted frequencies. Generally, cutting frequencies is preferred to adjust thefrequency response.• With appropriate signal processing, your loudspeaker should produce exceptionallygood sound. If it is used in a room with problematic acoustics, there is little you cando to overcome the room problems with electronic adjustments. Your best solutionis careful placement and aiming of the loudspeaker so most of the sound is directedonly at the audience.• Most EAW Commercial loudspeakers are capable of sound levels that can bedamaging to human hearing. Take precautions so that audiences are not exposedto such levels. If you must expose yourself to these kinds of volume levels, wearadequate hearing protection.• Take care when moving or lifting the loudspeaker. Injury to you or damage to theloudspeaker can result from careless handling.