RCF TTP 4-A Dual 10" 2-Way 3200W Narrow-Directivity Powered Line-Source Array Speaker with RDNet (Black) - Manuale (Pagina 22)

22
EN
IMPORTANT NOTE: The following presets are valid for TTL C4-A, TTP C4-A and TTW C4-A only.
Since TTx C4-A speakers are studied to be used in clusters, the usual RCF line array preset management is considered�
LOW FREQUENCY PRESET
In the low frequency range the interaction between the sound of single cabinets produces an
increase of sound level in low frequencies proportional to the number of loudspeakers in the
cluster� This effect unbalances the global equalization of the system: the interaction between the
loudspeakers decreases, increasing the frequency (they become more directive)�
For the control of the displacement described above it is necessary to progressively reduce the
low frequencies level in the global equalization reducing the gain if the frequency decreases
(low shelf filter)�
The preset is suggested considering the number of the cabinets in the cluster: the final tuning
of the system should be done with measurements and listening sessions, considering the
environmental conditions�
HIGH FREQUENCY PRESET
The sound propagation, in particular the high frequencies (1�5 KHz and up), depends essentially
on the conditions of the air in which it travels� We can generally affirm that air absorbs high
frequencies and the amount of absorption depends on temperature, humidity and the distance
that sound covers�
The decibel decrease is well modelled by a mathematical formula that combines the three
parameters (temperature, humidity and distance) giving a profile of the absorption in function
of the frequency�
In the case of a loudspeaker cluster the goal is the audience coverage with the best possible
uniformity, obtainable only by compensating for the absorption introduced by air� It is easy to
understand that every cabinet should be compensated differently from the other array cabinets
because the compensation should consider the distance at which the cabinet is aiming�
The compensation should be translated in terms of decibels that should be progressively added
with the increase of high frequencies�
There are 4 groups of 4 prestes, making a total of sixteen presets:
C - CLOSE (C1, C2, C3, C4)
When the listening distance is less than 8 meters�
M - MEDIUM (M1, M2, M3, M4)
When the listening distance goes from 8 to 16 meters�
F - FAR (F1, F2, F3, F4)
When the listening distance goes from 16 to 32 meters�
H - HIGH DISTANCE (H1, H2, H3, H4)
When the listening distance is more than 32 meters�
The number following the letter stands for the number of speakers on the cluster.
PART 2 | 8. PRESETS
TTL C4-A, TTP C4-A, TTW C4-A