24 d&b Q-Series
The Q-Series configuration examples
A small Q-Series line array configuration as shown on
the opposite page could consist of two D12 amplifiers, three
Q1/Qi1 loudspeakers, one Q7/Qi7 loudspeaker and four
Q-SUBs/Qi-SUBs. Three Q1s/Qi1s are driven by one D12 channel
and one Q7/Qi7 from the other, this total load is acceptable for
one D12. The Q7/Qi7 is suspended horizontally with a rotated
horn as a downfill and enlarges the vertical coverage in the
near field. Four Q-SUBs/Qi-SUBs are driven by the second D12
amplifier.
A medium sized Q-Series configuration as shown on
page 26 could consist of three D12 amplifiers and six Q1/Qi1
loudspeakers along with two subwoofer stacks comprising three
Q-SUBs/Qi-SUBs and one QiCSA-SUBs in CSA mode. Two
Q1/Qi1 loudspeakers are driven from one channel using three
in total of the D12 channels. The forward facing Q-SUBs/Qi-SUBs
are driven from two D12 channels set in the standard Q-SUB
configuration. The rear facing Q-SUBs/QiCSA-SUBs are powered
by the remaining D12 channel configured for Q-SUBs with the
CSA mode selected. In small or medium sized configurations
using music program material a one to one ratio of Q1/Qi1 to
Q-SUBs/Qi-SUBs is recommended.
A large sized Q-Series configuration as shown on page
27 could consist of eight D12 amplifiers, sixteen Q1/Qi1
loudspeakers and two Q7/Qi7 loudspeakers along with two
subwoofer stacks comprising twelve Q-SUBs or Qi-SUBs with the
two middle cabinets in CSA configuration and one J-INFRA. All
the Q1/Qi1 loudspeakers are driven by eight D12 channels,
two Q7/Qi7 loudspeakers driven by one D6 amplifier are used
to cover the near field. Eight forward facing Q-SUBs/Qi-SUBs
are driven by four D12 channels set in the standard Q-SUB
configuration, whilst the rear facing Q-SUBs/QiCSA-SUBs are
driven by two D12 channels configured for Q-SUBs with the CSA
mode selected. The frequency response below 40 Hz can be
significantly enriched by the use of a J-INFRA subwoofer driven
from one D12. As the horizontal constant directivity of a Q1/Qi1
column is maintained down to 400 Hz, two columns of Q1s/Qi1s
can be arrayed side by side to provide wider horizontal coverage.
A horizontal angle of 50° between two columns provides the
best compromise between level and frequency response. The two
Q7s/Qi7s are used to cover the near field providing sufficient
coverage and level.
For further information please refer to the TI 385 d&b Line array
design, which is available for download at www.dbaudio.com.
Small basic configuration example
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