User Manual

14
bass from the main system is carried forward into the Sub-Bass System. This is a very important point and
together with REL’s Natural RollOff™ circuitry, ensures far superior system integration of the Sub-Bass
System with the main system.
HIGH LEVEL INPUT: Connections should be made to the same binding post on main amplifier as the main
speakers. Red to amplifier main right speaker red terminal, yellow to amplifier main left speaker red
terminal. Depending on the design of the amplifier, the black to amplifier main speaker black terminal,
right or left but not both. Please see a complete description of connecting to ClassD and
differential/balanced amplifier output designs in the following pages. Plug the Neutrik Speakon plug into
the HIGH LEVEL Speakon socket. Note: This connection does not draw power from the power amplifier and,
yes, your REL is a powered sub bass system. However, by deriving its signal from the main power amplifier,
better sound quality is achieved.
.1/LFE INPUT: This requires a phono-to-phono cable and is a dedicated true .1 channel. This circuit
therefore eliminates the normal Natural RollOff™ Crossover and passes the .1 LOW LEVEL signal through
with only the required 120Hz fourth-order filter.
LOW LEVEL INPUT: This single channel phono input allows for conventional connection to a preamplifier
and should be used in the rare event that a HIGH LEVEL connection proves incompatible. Plug one end of
a single phono-phono cable into the LOW LEVEL input jack of the REL and the other end into either the
left or right channel output of your preamplifier. Because much sub-50Hz bass information is mono, there
is little need to connect both left and right channels. Should your system require this style of connection
– HIGH LEVEL is preferred – additional performance is available by purchasing a second, matching REL and
running each as separate stereo subs.
PHASE SWITCH – Used to set phase
Position 0 / HIGH LEVEL, LOW LEVEL or LFE: 0 degrees phase
Position 180 / HIGH LEVEL, LOW LEVEL or LFE: 180 degrees phase
PHASE SELECTION AFFECTS BOTH HIGH- AND LOW LEVEL INPUTS
Crossover is always engaged for HIGH LEVEL INPUT. The .1/LFE signal does not pass through the
crossover circuit.