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 . [. . . ] Through this phase you need to pay close attention not to let the cables enter the space between one enclosure and the other, as their compression could cut them. 5 In the experimental phase we verified that the effect produced by the cable weight can be compensated by using a different hole for the coupling with the flying bar, subtracting one hole from the value suggested by the software. 45 5. 1. SUSPENDING AX3210P AND AX1118SP SYSTEMS 5. Guide to System Setup Figure 5. 5: Array coupled in the front and ready (on the left) and power wiring (on the right). During the lifting phase check continuously to make sure that the space between each loudspeaker and the next is free and that the lifting is smooth. If jams were to occur or if cables were to enter the space between the enclosures, do not try to free them during compression or lifting. Never try to operate in the space between the loudspeakers while they are being hoisted. Once the first loudspeakers of the array are under compression you can disengage the slotted bar from its U-shaped frame and insert it in the U-shaped frame of the next loudspeaker. 7. Slotted bars are inserted in the U-shaped frame At this point you can set the relative angle between the enclosures by inserting 94AXSMP1 pins through the numbered holes on the U-shaped frame or in the slotted bar itself. To couple the bar you can either use the hole at its end or the slot. If you use the slot, the numbers next to the holes correspond to the relative angle; instead, if you use the hole, you need to subtract 1. 5 degrees from the numeric value indicated next to the hole used on the U-shaped frame. 46 5. SUSPENDING AX3210P AND AX1118SP SYSTEMS Figure 5. 6: Pins are inserted through the U-shaped profile and the slotted bar 8. The angles are set by inserting the pins Figure 5. 7 shows some mounting examples with the angle set at 0 , 10 and 10. 5 . Next, you see a table for all possible configurations. " "                 '% , - . " "                 '% ,  ) ! % $ & ' ( ) * +) - . " % "             &% , $ #$ #$ %#$ $ & ' ( $ #$ #$ #$ #$ % %#$ $ & & '  ) ! % $ & ' ( % $ & ) * +) - . " % "                 '% , #$ #$ #$ #$ % %#$ $ $ & & #$ #$ #$ #$ #$ #$ #$ % % %#$ - . "    %  $  &   '  (      %  $  &   '  (      %  ) * +) % , #$ #$ #$ #$ % % & & & - . "    %  $  &   '  (      %  $  &   '  (      %  ) * +) % , #$ #$ #$ #$ #$ #$ #$ #$ #$ % & ' ( 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. [. . . ] 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. For time alignment of the Subs, it is necessary to position the microphone in the ground plane. B. 5 Selection of a measurement microphone When using an RTA or a transfer function measurement instrument, it is of paramount importance that the measurement microphone has a linear response. It is therefore necessary to test at a sound pressure level at which the response of the microphone remains linear; otherwise the resulting data from your measurements will be the sum of the responses of the system under test and those of the microphone itself. This will obviously result in tremendous errors5 . [. . . ]