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 temperature 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 protection 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 together 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.

POWER

ON

OFF

120 VAC 60HZ 350W

THERMAL

POWER

 

 

PARALLEL

SUBWOOFER

HIGH PASS

THRU

FULL RANGE

CONTROL

(MID/HIGH FREQ)

(FULL RANGE OUTPUT)

INPUT

 

OUTPUT

 

 

NORMAL

120Hz

 

 

 

 

 

(+4dBu )

 

 

 

 

L

 

 

L

 

 

 

OO +15

 

 

 

SUBWOOFER

 

 

 

LEVEL

 

 

 

NORMAL

R

 

 

 

 

 

R

 

 

 

REV 180

 

 

IN

PHASE

OUT

 

 

4