d&b audiotechnik J-INFRA Manual - Halaman 5

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Halaman Cetak
d&b audiotechnik J-INFRA Manual
INPUT A
AMP A
AMP B
Input/Output routing 2-Way Active mode
Cardioid polar pattern
Hypercardioid polar pattern
J-INFRA Manual

Operation

Only operate J-INFRA loudspeakers with a d&b amplifier configured for
NOTICE!
the J-INFRA, otherwise there is a risk of damaging the loudspeaker
components.
When "2-Way Active" and J-INFRA mode are selected, each pair of
amplifier output channels drives a single J-INFRA cabinet.
The input signal is fed to one amplifier channel, while the input signal is
routed (linked) to the second channel internally.
OUT A
2-Way
SenseDrive
With D12 amplifiers, to enable SenseDrive the loudspeaker cabinet has
to be connected to output A.
The two channels are tuned to create a cardioid dispersion pattern thus
OUT B
providing maximum rejection to the rear.
2-Way
Controller settings
When J-INFRA cabinets are placed close to J-SUB cabinets the standard
mode is selected.
70 Hz circuit
When J-INFRA cabinets are located remotely from J-SUB cabinets there
is less coupling between the systems. Selecting the 70 Hz circuit
compensates for this effect by extending the upper frequency limit to
70 Hz.
HCD circuit
Selecting HCD (Hypercardioid) optimizes the tuning of front and rear
channels for a maximum rejection at the left and right sides behind the
cabinet providing a hypercardioid dispersion pattern. This characteristic
is particularly useful for a setup with subwoofers stacked at the left and
right sides of a stage providing minimum interference onstage.
HCD mode can be used either freely radiating or in front of walls. The
minimum distance to rear walls is provided by the wheels on the cabinet
back. Even in HCD mode adjacent J-INFRAs have to be at least 60 cm
(2 ft) apart.
(1.1 EN)
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