5
F E A T U R E S
Crossover Low-Pass Filter Control
This control sets the frequency of the low-pass filter,
and is fully adjustable from 50 to 150Hz. Bass sound
below the selected setting are directed to the ICS Sub 24
amplifier and speaker.
Low Level Inputs
Use this input when your system has preamp outs and
amplifier inputs.
Low Level High Pass Outputs
When the low level inputs are used, these outputs
provide the signal that goes to the power amplifier in
the system. The signal from these outputs is high pass
filtered to remove bass sound below 80 Hz.
THX Input
This input is for use with receivers or surround sound
controllers that have built-in THX control systems. This
input bypasses the low pass filter and
ALL
the crossover
controls of the ICS Sub 24.
Speaker Level Inputs
The ICS Sub 24 also has high-level inputs that can be
used when preamp outputs/power amp inputs are not
available. The 5-way gold-plated terminals accept spade
lugs to 5/16 inch, pins, banana plugs, and up to 12-
gauge bare wire. When main speakers are connected to
the speaker level
Speaker Level Outputs
These outputs provide signals for the main speakers
when the speaker level inputs are used. The signal from
this output is high pass filtered to remove bass informa-
tion below 80 Hz.
Bass Level Control
The Bass Level control adjusts the sound level output of
the ICS Sub 24. It is located on the front of the cabinet,
behind the grille.
To access the control grasp the top and bottom edges
of the grill and pull it straight off the front of the
cabinet. A typical setting for the control is around the
12 o’clock position.
Bass Drivers
The ICS Sub 24 uses two 12-inch (305 mm) custom-built
bass unit with dual spiders, a coated paper cone with
butyl surround, and a die-cast aluminum chassis. The
driver has a front-mounted heat sink that draws heat
away from the voice coil, increasing power capacity.
Phase Switch
Determines whether the subwoofer adds or cancels in
the crossover region. The proper setting changes based
upon the current location of the speaker.
Turn On Mode
This switch controls the automatic power up function.
When the switch is set to Auto On, the amplifier will
power up when it senses an input signal. If no input signal
is present, the amplifier switches to low power standby
mode after 8-10 minutes. The LED next to the Power switch
lights green when the amplifier is on, and yellow when it is
in standby mode. Put the switch in the Always On position
to defeat the automatic power down feature.
Power Switch
The main power switch is located next to the power cord
socket. Push in the top side of the switch to turn on the
main power to the system. Push in the bottom side to
turn off the main power. Usually the only time the main
power switch should be turned off is when the sub-
woofer will not be used for an extended period of time,
such as when you are away on a vacation.
Handmade Cabinets
Our cabinet department hand assembles each unit, and
then hand sands each several times. The result is a
cabinet of exceptional workmanship, with sharp corners
and smooth sides.
Veneers
We use premium, book-matched veneers, chosen for
grain consistency and aesthetics. Our cabinet shop
sequences the veneer, maintaining a match from the left
side, across the top, to the right side of the speaker. We
even veneer the inside of the cabinet so it won’t warp or
separate at the edges as the humidity changes .
8
Alternate High Level Connection
The alternate method for making high level connections is to connect both the ICS Sub 24 and the main speakers
directly to the amplifier. This type of connection does not take advantage of the high pass filter provided by the High
Level Outputs of the ICS Sub 24. Consequently the main speakers will operate full range.
There are two connection methods. Both methods are electrically equivalent. Which one you use will depend largely
on you physical set up of your room.
One method is to connect both the main speakers
and the ICS Sub 24 directly to the amplifier.
ALWAYS ON
0
°
PHASE
180
°
HIGH LEVEL IN FROM AMP
L
+
–
R
+
–
HIGH LEVEL OUT TO MAIN SPEAKERS
AUTO ON
+
L
R
-
Amplifier, Receiver or
Preamp/Power Amp
ALWAYS ON
0
°
PHASE
180
°
HIGH LEVEL IN FROM AMP
L
+
–
R
+
–
HIGH LEVEL OUT TO MAIN SPEAKERS
AUTO ON
+
L
R
-
Amplifier, Receiver or
Preamp/Power Amp
The other method is to connect the amplifier to the
main speakers and then run extension wires from the
main speakers to the ICS Sub 24.
