User manual PROEL PLLAS050

[. . . ] Names and brands quoted throughout the manual are generally deposited or registered by the respective manufacturers. Contents 1 Introduction 1. 1 The sound out front!1. 1. 3 Typical applications of PLLAS050 Vertical Arrays 1. 2 Technological Solutions . 1 1 1 3 3 6 6 7 9 10 13 16 18 21 23 25 27 27 28 28 28 31 31 32 32 35 35 36 36 37 37 38 39 39 41 41 41 53 54 55 55 . . 3 Accessories 3. 1 Accessories for flown or stacked installation . [. . . ] The posterior bars need to be fastened to the coupling housings in the rear of the flying bar, in the seats created by the L-folded plates welded to the crossbars. To obtain a correct assembly, the relative angle between the flying bar and the first enclosure of the array has to equal 0 : to do so insert 94AXSMP1 pins through the second hole from the top in the flying bar and through the hole of the bar. Please note that, in the back of the array, the pin stays on the enclosure, whereas in the front the pin is used on the enclosure immediately below. 5. Pins are disengaged and cams are extracted from KPTAX3210 flying bar 44 5. SUSPENDING AX3210P AND AX1118SP SYSTEMS  Figure 5. 4: Correct coupling point between the hole in the posterior bars and the flying bar. 6. The flying bar is coupled with the enclosure and fixed with pins · Coupling the flying bar with the lifting device The flying bar and the lifting device are coupled through the insertion of 22 mm shackles in the numbered holes on the bar itself. The indication of the correct hole to use will be provided by the LAC simulation software. You can use from one to three flying points according to the availability of the lifting devices and to their load capacity. Please note that, in case of wind, the solution with multiple flying points is to be preferred to improve the array stability. In this phase you can connect the elements of the array to their cables. We advise discharging the weight of the cables on the flying point by tying them with a textile fibre rope, instead of letting them hang freely: this way the position of the array will be much more similar to the simulation produced by the LAC software5 . " "                 '% ,  ) ! " % "             &% , $ #$ #$ %#$ $ & ' ( $ #$ #$ #$ #$ % %#$ $ & & '  ) ! " % "                 '% , #$ #$ #$ #$ % %#$ $ $ & & #$ #$ #$ #$ #$ #$ #$ % % %#$ - . "    %  $  &   '  (      %  $  &   '  (      %  ) * +) % , #$ #$ #$ #$ % % & & & - . "    %  $  &   '  (      %  $  &   '  (      %  ) * +) % , #$ #$ #$ #$ #$ #$ #$ #$ #$ % & ' ( Figure 5. 9: Verified configurations of arrays made with AX3210P and flying bar KPTAX3210. 52 5. SUSPENDING AX3210P AND AX1118SP SYSTEMS 5. 1. 2 Flying an array of AX3210P and AX1118SP using flying bar KPTAX3210 Flying bar KPTAX3210 allows the suspension of systems composed by AX3210P and AX1118SP6 . Array configuration choice We discussed the advisability of systems composed with suspended subwoofers in the preceding chapter. The LAC software will simulate the acoustic behaviour of the system, define its barycentre and determine the mechanical configuration of the system. Sequence of assembly operations The sequence of the assembly operations is exactly the same as described for arrays composed only of AX3210P. The only exception is the angle setting which is different when you have to couple AX3210P systems with AX1118SP. AX1118SP systems feature a U-shaped frame like the one mounted on AX3210P systems, which has a slotted bar for coupling purposes. [. . . ] In summary: There is no single correct position for the measurement microphone that will give reliable results for the entire audio spectrum. It will always be necessary to reposition the microphone according analyzer, the reading on the Y (f ) instrument exactly corresponds to the sought H(f ) module, as the stimulus contains a constant quantity of energy per each octave. Further details are available at www. siasoft. com, www. audiomatica. com and www. meyersound. com/products/sim/sim3/. 97 B. 5. Notes on system measurement  (a)  (b) Figure B. 4: Measurement microphones position: (a) on microphone boom stand, (b) in ground-plane. to the use intended for the results of the measurement. [. . . ]