JL Audio MHD600/4-24V, Руководство пользователя

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PreamP outPuts
The MHD600/4-24V incorporates a pass-
through preamp output section, so that additional
amplifiers can easily be connected to the same
signal(s) feeding the MHD600/4-24V. These
preamp output signals are accessible via a stereo
pair of RCA-type jacks, labeled “Preouts”, on the
Connection Panel.
The term “pass-through” refers to the fact that
the Preamp Output signals are not affected by
any crossover filter or input sensitivity setting
selected on the MHD600/4-24V (if the input
signal is full-range, the Preamp Output will be
full-range). These preamp output signals are
buffered to prevent noise and are always preamp
level, regardless of the level of signals feeding the
MHD600/4-24V’s inputs.
The pass-through Preamp Outputs can be
configured two different ways using the switch
labeled “Preouts From” in the “General Setup”
section of the Control Panel.
1) “Front”: The preamp output delivers the same
signal that is connected to the MHD600/4-24V’s
“Front Inputs”. This mode is useful for feeding
a subwoofer amplifier when the MHD600/4-24V
is being used to drive front and rear speaker
systems. In this mode, the preamp output level
will track with the signal level of the front input
signals, allowing the user to fade the rear channels
in and out, without affecting the subwoofer level.
3) “F+R” (Front + Rear): This mode delivers a
sum of the signals being fed to the “Front
Inputs” and the “Rear Inputs” of the
amplifier. When the MHD600/4-24V is
being used to drive front and rear speaker
systems, this preamp output mode will deliver
a summed front/rear signal to the subwoofer
amplifier, while permitting fading of the front
and rear speaker systems from the source unit.
remote leVel control (oPtional)
With the addition of the optional Remote Level
Control (HD-RLC), you can control the volume
of one or both channel pairs of the MHD600/4-
24V from the cockpit. This is useful for subwoofer
level control or even as a master volume control
for the system.
The HD-RLC connects to the jack labeled
“Remote Level Control” on the Connection
Panel of the amplifier using a standard telephone
cable (supplied with the HD-RLC).
If desired, multiple MHD amplifiers can be
controlled from a single HD-RLC controller
using a simple phone line “splitter” and multiple
phone cables (not supplied).