SYSTEMSdesk + kitchenPUBSREQUIREMENTS• Single audio zone• 4 selectable music sources:CD/MP3 with USB key, RADIOFM and two local sources• Use of low impedance (8ohm)lines• Audio source stereo play• Sound pressure level with widedynamics• Suitable covering of the wholeaudio spectrum that can beplayeddecoderdvdMS02 CD3/Tmusic sourceM12x4mixer preamplifierPROJECT SUB1180AloudspeakerSA2200two low impedance stereo channelsKJGHKJHKJCBJKHBBK SYSTEMSHALLTOILETSPROJECT 550BT/WTloudspeakerPROJECT 550BT/WTloudspeakerRESORTSRESTAURANTBARRECEPTIONCommonareasSAUNA - TURCKISH BATH -HYDORMASSAGEMULTI-PURPOSEhallGARDENREQUIREMENTS• 6 audio zones max. with selectedzonecall and background music• 2 selectable music sourcesCD/MP3 and RADIO FM• Independent volume control foreach zone• Ideal power required within240W• Use of 100V lines• It can spread music inenvironments of various types andwith different acousticsMBT 8006microphonebaseadditionalaudio sourceradiomicrophoneWM505CSL 520TICrecess loudspeakerMMA 6240 TCD/MPintegrated amplifierPROJECT 315 BTloudspeakerCSL 606TWPrecess loudspeakerPROJECT 320 BTloudspeakerGS20Texternal soundsystemCSL 106 Tloudspeaker91
GENERAL INFORMATION ON THE VARIOUS METHODS OF INSTALLATIONFBT: excellence with avast selectionFBT offers a vast andcomprehensive rangeof speakers to meet allsound requirements andapplications. Specificallydesigned to enable simpleand safe installation, with amodern and eye-catchingdesign, these products arethe ideal choice to solve allambient sound distributionrequirements.All product lines,from recessed ceilingloudspeakers in paintfinishedmetal or in plasticwith dual cone or coaxialloudspeakers, speakersconstructed using fireresistantmaterials, IP55-56-68 weatherproofelements, speakersdesigned for clean roomsor special productiondepartments, to theindustrial or entertainmentsound models,have been designedaccording to the latestelectro-acousticalparameters.The result is absoluteexcellence; perfectmusic reproduction andoptimal voice clarity andspeech fidelity. Specialattention has been paidto the simplification andreduction in time requiredfor installation andnetwork connections ofthe power cables, thanksto a special accessory kitsupplied as standard.The basic principles ofeffective surface mountceiling loudspeakerinstallationThe first priority of a highquality sound reproductionsystem is that of providinglisteners with soundinformation at an acousticlevel that is higher thanany possible backgroundnoise. The system mustsimultaneously assurea very wide frequencyband and the maximumintelligibility. It should alsoguarantee a flat frequencyresponse and uniformsound pressure to giveoptimum listening pleasureand clarity. To meetthese requirements, thehypothetical ideal solutionwould be to place eachsound source at an equaldistance from all possiblelistening points.Ceiling applicationIn environments offeringsuitable height, this idealreference standard canbe approximated byusing loudspeakers withvery wide response anddispersion angles thatremain unchanged atdifferent frequencies,arranged in a ceiling orshower type configuration.This gives the followingbenefits:1- Maximum sounddistribution uniformity2- Maximum speechintelligibility3- Constant quality ofmusic reproduction4- Reduced presenceof reverberation andstationary waves in theenvironment5- Sound source remainsat a constant distancefrom the listeningposition6- Ample sound energyalso at the lowest levelOnce the required typeof loudspeaker hasbeen chosen, and thecharacteristic parametersconsidered (particularlythe relationship betweenthe dispersion angleand the room surfacearea), the number ofunits needed to obtainconstant and uniformsound diffusion can beeasily calculated. Thenumber of loudspeakers iscalculated by dividing thefloor area in square metresby the area of coverageof each loudspeaker onthe listening plane. Figure1 clearly illustrates theabove concept.H(H-1,5 mt)2√2,5 mt2√2,5 mtα5√6 mt5√6 mt12 mt24 mtWall applicationsIf the architecturalfeatures of the room arenot compatible with aceiling configuration orif a “wall” application ispreferred, it is essential toobserve a few basic rulesto obtain the best possiblesound distribution. Inorder to maintain thelistening point inside thedirect signal area, bothsurface mounted andexternal loudspeakers,with power from 6 to 20Watt, should be installedat a height of between 2and 2.5 m. The maximum2 x 2ZONAD'OMBRA4√5 mt8√10 mtα5√6 mt1,5 mtfigure 1figure 2figure 3distance between adjacentloudspeakers must be nomore than 5/6 metres alongthe length of the room,which should be no widerthan 4/5 metres. For widerrooms, e.g. about 8-10metres, it is recommendedto install loudspeakers inan alternated pattern alongboth the opposing walls insuch a way as to provideadequate coverage andmaintain sound pressureat the most constantpossible level in the areain question (see figures 2and 3).A quick and approximatecalculation can be madeof distance d, whichseparates the centres oftwo loudspeakers, whenthe angle of emission Aand height of the ceiling His known: d=2*(H-1)*Bwhere H is the height ofthe ceiling expressed inmetres, constant 1 is theheight of the listeningsurface of a seated personand B is the tangent ofA/2. From the above data,it is evident that for thesame ceiling height H,loudspeakers with widerdispersion angles offer alarger sound diffusion areaand therefore a smallernumber of speakers areeffectively needed.figure 4Layout of loudspeakers for 80% coveragefigure 5Layout of loudspeakers for 100% coverageFigure 4 shows the surfacearea covered by the soundsignal with relative darkzones, and figure 5 with adifferent grid and greaternumber of loudspeakers(50%) guaranteesmaximum uniformity.92Angle of Coefficient d with d with d with d withloudspeaker B H=3m H=3.5m H=4m H=4.5memission80 0,84 3,36 4,2 5,04 5,8890 1,00 4 5 6 7100 1,19 4,76 5,95 7,14 8,33110 1,43 5,72 7,15 8,58 10,01120 1,73 6,92 8,65 10,38 12,11130 2,14 8,56 10,7 12,84 14,98
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