EAW SB730 Owner's Manual

Also see for KF730P: Specification sheet

Contents

Page 10 of 28 RD0169 (A) KF730 & SB730 OWNER’S MANUAL5.4.1 Factory Signal Processing SettingsThe signal processing adjustments determined by EAW for the KF730 Series Array should befully implemented “as is.” These settings are determined from extensive measurements in typicalvenues as well as the theory of curved sources from the acoustical work of physicists Harry Olsenand Leo Beranak. As such, they will normally provide excellent results in a variety of venues.The signal processor settings are provided in the KF730 Wizard. The Wizard can upload settingsto EAW MX8700 Series processors and selected third party DSP processors.5.4.2 Non-EAW Digital Signal ProcessorsEven though they can be set to numerically equal values, the actual transfer function (magnitudeand phase) of the processing depends on the particular digital processor. The reason is thatdifferent algorithms can be and are used to implement the same processing functions. Thefactory settings were determined using EAW’s MX8750 Digital Signal Processor. If you will beusing a non-EAW DSP, contact EAW about its compatibility with the EAW factory settings.5.5 AMPLIFIER GAIN SETTINGSIn order for Divergence Shading to work properly, all amplifiers for all passbands must be set tothe same voltage gain, regardless of their power output ratings. Among other things, equalamplifier gains are required to maintain array coherence throughout the venue.NOTE: This does NOT mean the same input sensitivity, but the same input to output voltagegain. Consult your amplifier manufacturer if this cannot be readily determined. Do not selectivelyboost or attenuate loudspeaker levels at the amplifiers in order to achieve consistent SPL atvarious distances. This is achieved by adjusting the array curvature as described above.5.6 USER ADJUSTMENTS5.6.1 EqualizationEAW recommends that 1/3 octave or careful use of parametric equalization be used to modifyperformance to accommodate a particular program, venue characteristics, or personal taste.5.6.2 Array MeasurementsSMAART - The SmaartLive program from SIA Software Company is an ideal tool to use tomeasure and optimize a KF730 array for a particular venue. This is a fast, yet sophisticated,process that will indicate problem areas due to particular venue characteristics. Usually it is amatter of applying small amounts of 1/3 octave or parametric equalization to adjust significantanomalies. A demo version of SmaartLive is available at www.siasoft.com.5.7 AMPLIFIER POWER REQUIREMENTSAs is true of all professional loudspeaker systems, the performance of the KF730s and SB730sdepends on amplifiers delivering an adequate supply of clean power. Determining the appropriatepower amplifier wattage for a given loudspeaker and application is a subject of some debate. Infact, there are three distinct issues regarding amplifier power as discussed in the next sections:“Power Ratings,” “Selecting an Appropriate Amplifier Size,” and “Operating Limits.”For more information on selecting amplifiers, please consult EAW’s Technical Paper on AmplifierPower, available on the EAW web site; or contact EAW Applications Support Group.5.7.1 Power RatingsThe KF730 is a bi-amplified loudspeaker, requiring one LF and one MF/HF amplifier channel. TheSB730 has two drivers (SUB 1 and SUB 2) wired separately to the input connectors. This meansthe drivers can be connected in parallel to a single amplifier channel or each can be connected toa separate amplifier channel.