L-Acoustics V-DOSC, Руководство оператора

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L-ACOUSTICS V-DOSC Manual Version 4 6/29/2005 Page 86 of 158
Stacking Guidelines
The stacking system is rated for a maximum of 6 V-DOSC enclosures - always use angle
straps between enclosures
For stacked systems, the well-defined vertical coverage of V-DOSC allows little margin for error.
Whether the audience is standing or seated is an important consideration and the system should be
stacked on a riser of suitable height (or on top of subwoofers) so that the system is higher than the
listening level of the first row of the audience. In addition, the entire array should be tilted downwards
(by adjusting rear BUMP2 screwjacks) to obtain better high frequency penetration into the audience.
If the bottom of the array is too low, the first rows receive too much SPL and audience members
directly in front of the system will shadow the following rows acoustically. An additional technique to
avoid build up for the closest members of the audience is to install the system further upstage – the
initial distance-attenuation loss to the first few rows will help provide better SPL distribution
throughout the entire audience without the need to attenuate the mid or high sections of lower
enclosures (which will affect the overall output of the system).
To summarize, the bottom of the stacked array should be higher than the audience (more than 2 m or
6.5 ft above floor level), with the lowest enclosure tilted downwards as necessary. For more details on
stacking procedures, please refer to Section 4.1.
Note: When simulating stacked system coverage in ARRAY2004 or SOUNDVISION, account for the one
degree difference in angle strap values for stacked versus flown systems (see Section 2).
Figure 60: Illustration of Stacking Guidelines
Figure 61: Stacked system example (Puy du Fou, France)