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
and black to amplifier main speaker black terminal, right or left but not both. 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.
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