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4
REAR PANEL DESCRIPTION
The SRS1500 has several connectors and
features that you should understand.
POWER Switch
Use this switch to turn the SRS1500 on
and off. Make sure the signal source’s level
control is turned down before you turn it on.
AC Receptacle
This is where you connect the AC line-
cord to provide AC power to the SRS1500’s
built-in power amplifiers. Plug the linecord
into an AC socket properly configured for
your particular model.
THERMAL Indicator
The SRS1500 has a thermal protection
circuit that monitors the internal tempera-
ture of the amplifier and heatsink. If the
temperature should exceed a safe operating
level, the signal is muted and the
THERMAL
indicator lights. When the temperature
cools to a safe level once again, the thermal
protection circuit deactivates and normal
operation continues.
Note: Activation of the thermal protec-
tion circuit is an indication that you must
take steps to avoid continued thermal prob-
lems. See “Thermal Considerations” on
page 6.
POWER Indicator
When the
POWER
switch is turned on
and the linecord is connected to an active
AC power supply, this indicator lights green
to let you know that you’re ready to rock
and roll. The cool blue LED on the front of
the cabinet works in the same way.
FULL RANGE INPUT
These are female XLR-type connectors
that accept a balanced line-level signal from
a mixing console or other signal source.
THRU (FULL RANGE OUTPUT)
These are male XLR-type connectors
that produce exactly the same signal that is
connected to the
FULL RANGE INPUT
jack.
Use it to daisy-chain several SRS1500s to-
gether off the same signal source.
HIGH PASS (MID/HIGH FREQ) OUTPUT
These are male XLR-type connectors
that produce the frequencies above 120Hz.
Connect these to a pair of full-range active
speakers or to an amplifer/passive speaker
combination. The SRS1500 reproduces the
frequencies below 120Hz.
SUBWOOFER LEVEL Control
This adjusts the subwoofer level. Use
this control to balance the volume between
the subwoofer and the full-range speakers.
The center detent position is +4 dBu gain,
which is the normal position. Unity gain is
at the 9 o’clock position.
PHASE
This switch reverses the phase of the
signal at the
HIGH PASS OUTPUT
jacks.
Depending on the placement of the
SRS1500 subwoofer relative to the full-
range speakers, you may get a better
low-frequency response in the room if you
reverse the phase of the signal. Experiment
with this switch to determine which position
sounds best.
POWERTHERMAL
THRU
(FULL RANGE OUTPUT)
HIGH PASS
(MID/HIGH FREQ)
OUTPUT
SUBWOOFER
CONTROL
FULL RANGE
INPUT
PARALLEL
120Hz
ON
OFF
NORMAL
REV 180
PHASE
120 VAC 60HZ 350W
POWER
L
R
L
R
SUBWOOFER
LEVEL
(+4dBu )
NORMAL
+15
OO
IN OUT