Remote Level Control (Optional); Speaker Connections - JL Audio HD750/1 Owner's Manual

When connected to the amplifier, the HD-RLC
operates as follows. At full counter-clockwise
rotation, the audio will mute completely. At full
clockwise rotation the level will be the same as if
the HD-RLC was not connected at all. In other
words, it operates strictly as a level attenuator.
@
@
e
0
e
0
( SPEAOCER OUT J
m:u
®
SPEAKER CONNECTIONS
The HD750/1 employs JL Audio's exclusive
Regulated, Intelligent Power Supply (R.LP.S.)
design. This sophisticated power supply allows
the amplifier to produce its optimum power (750
watts x 1) over a wide range of supply voltage and
speaker impedances.
Unlike conventional amplifiers that require
a specific impedance to produce optimum
power, the R.LP.S.-equipped HD750/1 gives
you the freedom to use a variety of speaker
configurations that achieve final nominal
impedances between 1.5 - 4Q (without
sacrificing power output or sound quality).
The operation of the R.LP.S. circuitry is
entirely automatic and adjusts itself every time the
amplifier is turned on. There are no user controls
to configure. The system operates through
multiple stages of impedance optimization,
choosing the stage most appropriate to the actual
impedance of the speakers you connect to it.
Remote
Level
Control
Preouts
REMOTE LEVEL CONTROL (OPTIONAL)
With the addition of the optional Remote Level
Control (HD-RLC), you can control the volume
of the HD750/1 from the front of the vehicle. This
is particularly useful for subwoofer level control.
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 HD amplifiers can be
controlled from a single HD-RLC controller
using a simple phone line "splitter" and multiple
phone cables (not supplied).
DIMPORTANTI
The RBC-I Remote Bass Control used with
JL Audio Slash, Slash v2, e-Series, A-Series and
G-Series amplifiers is NOT compatible with the
HD Series amplifiers. If you attempt to connect
an RBC-l to an HD amplifer, the control will
not work. You must use the HD-RLC controller.
DIMPORTANTI
If you connect a load higher than 40 nominal,
power will drop by half with every doubling of
impedance above 40 stereo. If you connect a
load lower than 1.50 nominal, the amplifier
protection circuitry activates a "safe" mode
which reduces amplifier power to protect the
circuitry from failure (the LED status indicator
on the control panel will light up amber to
indicate that this has happened). See page 14
for details.
13