Operation Manual

REL Acoustics ‘ST III’ User Manual

To connect to differential (balanced output) power amplifiers using the

BALANCED high level input

To engage the Neutrik Speakon plug, insert fully into socket and rotate clockwise until locked.

To remove the Neutrik Speakon plug, grip body of plug, place thumb on chrome lever, move

lever backwards rotate plug anti-clockwise (counter-clockwise in the US) quarter turn and

withdraw.

The high level balanced input is also single channel and is designed to take the high level

output from the speaker terminals of differential output (bridged mode) amplifiers. Because

the intention of using separate bridged amplifiers is to ensure entirely separate signal paths

for both channels, two separate Sub-Bass Systems are required for your system to reach its

optimum potential, one for each channel.

A differential amplifier does not have to be a mono amplifier. There are a number of stereo

integrated and basic amplifiers that are differential.

The output topology of the amplifier should be checked before connection to the Sub Bass

System is made, if this is not clear from the amplifier user manual then consult the

manufacturer.

Supplied Neutrik Speakon High level Interconnect

YELLOW

BAL HI INPUT Release lever RED + -

RIGHT

MONO

BLACK BLOCK

SPK OUT

PRE AMPLIFIER

Ground

(see below)

High Level connections should be made to the same binding posts as the main speakers

Note: Monoblock amplifiers may or may not be bridged output. See the manufacturers

documentation for your amplifier if you are uncertain.

The BLACK should be connected to ground at the pre-amplifier. If the pre amplifier does not

have a ground terminal, then use one of the chassis screws at the rear of the pre-amplifier.

The output level is adjusted using the control marked HI LEVEL